List of seaweeds of South Africa

This is a list of seaweeds recorded from the oceans bordering South Africa:

Kingdom: Plantae — Division: Chlorophyta — Green seaweeds

Class: Bryopsidophyceae

Order: Bryopsidales

Family: Bryopsidaceae

• Bryopsis africana Areschoug, 1851, (Probably along the whole of the west Cape coast)
• Bryopsis eckloniae Stegenga, Bolton & Anderson 1997, (Muizenberg, endemic)
• Bryopsis hypnoides Lamouroux, 1809c, (False Bay)
• Bryopsis myosuroides Kützing 1856, (Plettenberg Bay eastward, as far north into KwaZulu-Natal as Rabbit Rock)
• Bryopsis plumosa (Hudson 1778) C.Agardh 1823, syn. Ulva plumosa Hudson 1778, (False Bay and eastward)
• Pseudobryopsis hainanensis C.K.Tseng 1936, syn. Trichosolen hainanensis (C.K.Tseng) W.R.Taylor 1962, (KwaZulu-Natal from Mabibi northwards)

Family: Caulerpaceae

• Caulerpa bartoniae G. Murray, 1896, (Rare in Western Cape, Cape Hangklip and Muizenberg. Mainly from south coast. endemic)
• Caulerpa brachypus f. parvifolia (Harvey) A.B.Cribb 1958, (extending into KwaZulu-Natal as far south as Protea Banks)
• Caulerpa cupressoides (West) C.Agardh 1817, syn. Fucus cupressoides H.West 1802, Chauvinia cupressoides (M.Vahl) Trevisan 1849, (KwaZulu Natal from Mabibi northwards)
• Strap caulerpa Caulerpa filiformis (Suhr) Hering 1841, syn.Amphibolis filiformis Suhr 1834, Himandactylius filiformis (Suhr) Trevisan 1849, (False Bay to northern KwaZulu-Natal)
• Feathery caulerpa Caulerpa holmesiana G. Murray, 1891, (Mainly a south coast species. the westernmost records at Cape of Good Hope, endemic)
• Caulerpa mexicana Sonder ex Kützing 1849, syn. Caulerpa crassifolia f. mexicana (Sonder ex Kützing) J.Agardh 1873, Caulerpa pinnata f. mexicana (Sonder ex Kützing) Weber-van Bosse 1898, (KwaZulu-Natal coast from Aliwal shoal northwards)
• Caulerpa nummularia Harvey ex J.Agardh 1873, syn. Caulerpa peltata var. nummularia (Harvey ex J.Agardh) Weber-van Bosse 1898, Caulerpa racemosa var. nummularia (Harvey ex J.Agardh) D.Dixit 1926, (Sodwana Bay)
• Caulerpa peltata J.V.Lamouroux 1809, syn. Ahnfeldtia peltata (J.V.Lamouroux) Trevisan, Chauvinia peltata (J.V.Lamouroux) Kützing 1849, Caulerpa racemosa var. peltata (J.V.Lamouroux) Eubank 1944, Caulerpa laetevirens Montagne 1842, Chauvinia laetevirens (Montagne) Trevisan 1849, Caulerpa racemosa var. laetevirens (Montagne) Weber-van Bosse 1898, (as C.racemosa var. laetevirens. Port Alfred northwards. As C.racemosa var. peltata, Durban northwards)
• Caulerpa racemosa var. lamourouxii (Turner) Weber-van Bosse 1898, Ahnfeldtia lamourouxii (C.Agardh) Trevisan 1849, Fucus lamourouxii Turner 1811, Chauvinia clavifera var. lamourouxii (Turner) Kützing 1849, (St Lucia northwards)
• Caulerpa scalpelliformis var. intermedia Weber-van Bosse 1898, syn. Caulerpa scalpelliformis f. intermedia (Weber-van Bosse) Svedelius 1906, (KwaZulu-Natal from Mission Rocks northward)
• Caulerpa serrulata var. hummii (Díaz-Piferrer) Farghaly 1980, syn. Caulerpa hummii Díaz-Piferrer 1969, (Sodwana Bay northwards)
• Caulerpa taxifolia f. asplenoides (Greville) Weber-van Bosse 1898, syn. Caulerpa asplenioides Greville 1853, (KwaZulu-Natal coast from Aliwal shoal northwards)
• Caulerpa webbiana Montagne 1837, syn. Chauvinia webbiana (Montagne) Kützing 1849, (Sodwana Bay northwards)
• Caulerpa zeyheri Kützing 1857, syn. Caulerpa racemosa var. zeyheri (Kützing) Weber-van Bosse 1898, (Haga Haga north of East London northwards into Mozambique)

Family: Codiaceae

• Codium capitatum P.C.Silva 1959, (Port St. Johns northward)
• Duthie’s upright codium Codium duthieae Silva in Silva & Womersley, 1956, (Mainly a south and east coast species, westwards as far as Langebaan logoon.)(From Namibia along the entire South African coast)
• Hairy upright codium Codium extricatum Silva 1959a, (Cape Agulhas to southern KwaZulu-Natal, endemic)
• Fragile upright codium Codium fragile subsp. fragile (Suringar) Hariot 1889, synCodium fragile (Suringar) Hariot subsp. capense Silva 1959a, Acanthocodium fragile Suringar 1867, (Whole of Cape west coast and most of Namibia, Eastward as far as Robberg, Plettenberg Bay)
• Codium isaacii Silva, 1959a, (Namibia to Cape Peninsula, endemic)
• Lucas’ codium Codium lucasii Setchell subsp. capense Silva 1959a, (Strand, False Bay to southern Mozambique)
• Codium megalophysum P.C.Silva 1959, (Port Elizabeth to Isipingo, endemic)
• Codium mozambiquense P.C.Silva 1959, (Port Edward northward into Mozambique, Southern African endemic)
• Codium papenfussii Silva, 1959a, (West coast of Cape Peninsula to southern KwaZulu-Natal, single specimen from Sodwana Bay, endemic)
• Flat-lobed codium Codium platylobium Areschoug 1854, (False Bay to mouth of Mtwalume river in KwaZulu-Natal)
• Codium prostratum Levring 1938, (Dwesa, south of Port St. Johns northward into Mozambique)
• Stephens’ codium Codium stephensiae Dickinson 1932, (St Helena Bay to Transkei, endemic)

Family: Derbesiaceae

• Derbesia hollenbergii Taylor 1945, (Muizenberg and Strandfontein, False Bay, and Eastern Cape and Transkei)
• Derbesia marina (Lyngbye) Solier 1846, syn. Vaucheria marina Lyngbye 1819, (Muizenberg, False Bay, and Eastern Cape and Transkei)

Family Halimedaceae

• Halimeda cuneata Hering in Krauss 1846, (Cape St. Francis eastwards to Mozambique)
• Halimeda gracilis Harvey ex J.Agardh 1887, (Northern Kwazulu-Natal)
• Halimeda tuna (J.Ellis & Solander) J.V.Lamouroux 1816, syn. Halimeda tuna var. typica, Corallina tuna J.Ellis & Solander 1768, (Northern KwZulu-Natal)

Family: Udoteaceae

• Chlorodesmis sp. indet (Oudekraal, Cape Peninsula, endemic)
• Chlorodesmis hildebrandtii A.Gepp & E.S.Gepp 1911, (North Kwazulu-Natal from Rabbit Rock northwards)
• Pseudocodium devriesii Weber-van Bosse 1896, (East London eastward into Mozambique)
• Pseudocodium floridanum Dawes & Mathieson 1972, (Sodwana Bay area)
• Udotea orientalis A.Gepp & E.S.Gepp 1911, syn. Rhipidosiphon orientalis (A.Gepp & E.Gepp) Farghaly 1980, (Hluleka northwards into Mozambique)

Class: Chlorophyceae

Order: Chaetophorales

Family: Chaetophoraceae

• Acrochaete sp. indet (Glencairn (False Bay) and De Hoop nature reserve)
• Stromatella sp. indet (Hondeklipbaai to Yzerfontein)

Family: Chroolepidaceae

• Sporocladopsis novae-zelandiae Chapman, 1949 (Yzerfonten to East London)

Class Dasycladophyceae

Order Dasycladales

Family Dasycladaceae

• Bornetella nitida Munier-Chalmas ex Sonder in Mueller 1880, (Northern KwaZulu-Natal)
• Dasycladus ramosus Y.M.Chamberlain 1958, (Northern KwaZulu-Natal into Mozambique)
• Neomeris vanbosseae M.A.Howe 1909, (Northern KwaZulu-Natal)

Class Siphonocladophyceae

Order Siphonocladales

Family Siphonocladaceae

• Chamaedoris auriculata Børgesen 1933, (no range specified)
• Chamaedoris delphinii (Hariot) Feldmann & Børgesen in Borgesen 1940, syn. Siphonocladus delphinii Hariot 1902, (Port Alfred northwards)
• Dictyosphaeria cavernosa (Forsskål) Børgesen 1932, syn. Ulva cavernosa Forsskål 1775, (Island Rock to Bhanga Nek in northern KwaZulu-Natal)
• Dictyosphaeria versluysii Weber-van Bosse 1905, (Island Rock northwards)

Family Boodleaceae

• Boodlea composita (Harvey) F.Brand 1904, syn. Conferva composita Harvey 1834, Cladophora composita (Harvey) Kützing 1849, Aegagropila composita (Harvey) Kützing 1854, (Sodwana Bay)
• Phyllodictyon anastomosans (Harvey) Kraft & M.J.Wynne 1996, syn. Cladophora anastomosans Harvey 1859, Pterodictyon anastomosans (Harvey) J.E.Gray 1866, Struvea anastomosans (Harvey) Piccone & Grunow ex Piccone 1884, (Sodwana Bay)

Family Valoniaceae

• Valonia macrophysa Kützing 1843, (Morgan Bay northward)
• Valoniopsis pachynema (G.Martens) Børgesen 1934, syn. Bryopsis pachynema G.Martens 1866, Valonia pachynema (G.Martens) Weber-van Bosse 1913, (St Lucia northward)

Class: Ulvophyceae

Order: Cladophorales

Family Anadyomenaceae

• Anadyomene wrightii Harvey ex J.E.Gray 1866, (Shelly Beach northward)
• Microdictyon kraussii J.E.Gray 1866, (Shelly beach northward into Mozambique)

Family: Cladophoraceae

• Chaetomorpha antennina (Bory de Saint-Vincent) Kützing 1847, syn. Conferva antennina Bory de Saint-Vincent 1804, (Port Edward northwards)
• Chaetomorpha aerea (Dillwyn) Kützing 1849, syn. Conferva aerea Dillwyn 1806, Chloronitum aerea (Dillwyn) Gaillon 1828, (False Bay to Cape Agulhas)
• Chaetomorpha capillaris (Kützing) Børgesen 1925, syn. Rhizoclonium capillare Kützing 1847, (Kraalbaai, Langebaan lagoon)
• Chaetomorpha ligustica (Kützing) Kützing 1849, syn. Conferva ligustica Kützing 1843, Rhizoclonium lubricum Setchell & Gardner in Gardner 1919, (Kraalbaai, Langebaan Lagoon)
• Hair weed Chaetomorpha linum (O.F.Müller) Kützing 1845, syn. Conferva linum O.F.Müller 1778, Lychaete linum (O.F.Müller) Areschoug 1851, (Kalk Bay and Simon’s Town harbours)
• Robust hair-weed Chaetomorpha robusta (Areschoug) Papenfuss 1940, syn. Lychaete robusta Areschoug 1851, (Namibia to Hermanus)
• Chaetomorpha sp. indet, (Clovelly, False Bay)
• Cape cladophora Cladophora capensis (C.Agardh) De Toni 1889, syn. Conferva capensis C.Agardh 1824, (Namibia to southern Cape Peninsula)
• Turf cladophora Cladophora contexta Levring 1938, (Olifantsbos to Lüderitz)
• Cladophora dalmatica Kuetzing 1843, (Glencairn, False Bay)
• Blue whip cladophora Cladophora flagelliformis (Suhr) Kützing 1849, syn. Conferva flagelliformis Suhr 1840, Lychaete flagelliformis (Suhr) Areschoug 1851, (Brandfontein to Namibia)
• Cladophora herpestica (Montagne) Kützing 1849, syn. Conferva herpestica Montagne 1842, Aegagropila herpestica (Montagne) Kützing 1854, Cladophoropsis herpestica (Montagne) M.A.Howe 1914, (as Cladophoropsis herpestica, sporadically in South African east coast north of Trafalgar in south KwaZulu-Natal)
• Cladophora horii Hoek & M.Chihara 2000, (The Bluff in Durban, northwards)
• Cladophora isaacii Simons 1960, (Port Nolloth to Cape Hangklip)
• Cladophora mirabilis (C.Agardh) Rabenhorst in Hohenacker 1852, syn. Conferva mirabilis C.Agardh 1820, (Cape Hangklip to Cape Fria, Namibia)
• Cladophora ordinata (Børgesen) C.Hoek 1982, syn. Willeella ordinata Børgesen 1930, (Mkambati (north of Port St Johns) northwards)
• Cladophora prolifera (Roth) Kützing 1843, syn. Conferva prolifera Roth 1797, Chloronitum proliferum (Roth) Gallion 1828, Chantransia prolifera (Roth) Chevalier 1836, Cladophora rugulosa G.Martens 1866, (Port Alfred northwards)
• Cladophora radiosa (Suhr) Kützing 1889, syn. Conferva radiosa Suhr 1834, (Table Bay eastwards to Cape Morgan)
• Cladophora sericia (Hudson) Kützing 1843, syn. Conferva sericea Hudson 1762, Chloronitum sericeum (Hudson) Gallion 1928, (Cape Peninsula north to Melkbosstrand, east to De Hoop nature reserve)
• Cladophora vagabunda (Linnaeus) Hoek 1963, syn. Conferva vagabunda Linnaeus 1753, Ceramium vagabundum (Linnaeus) Roth 1800, (Sodwana Bay and Bhanga Neck in northern KwaZulu-Natal)
• Cladophora sp. indet. (Clovelly to Buffels Bay, Cape Peninsula)
• Rhizoclonium implexum (Dillwyn) Kützing 1845, SYN. Conferva implexa Dillwyn 1809, Rhizoclonium riparium var. implexum (Dillwyn) Rosenvinge 1893, (Kraalbaai, Langebaan lagoon and Clovelly, Cape Peninsula)
• Rhizoclonium riparium (Roth) Harvey 1849, syn. Conferva riparia Roth 1806, Tiresias riparia (Roth) Areschoug 1851, (Kraalbaai and Kowie estuary)

Order: Codiolales

Family: Acrosiphoniaceae

• Urospora media Levring 1938, (Port Nolloth and Groenrivier)

Order: Ulotrichales

Family: Ulotrichaceae

• Ulothrix flacca (Dillwyn) Thuret in Le Jolis 1863, syn. Conferva flacca Dillwyn 1805, Lyngbya flacca (Dillwyn) Harvey 1849, (Cape Peninsula and False Bay)
• Ulothrix speciosa (Carmichael) Kützing 1849, syn Ulothrix zonata var. speciosa (Carmichael) Stockmayer, Lyngbya speciosa Carmichael 1833, Hormotrichum speciosum (Carmichael) P.L.Crouan & H.M.Crouan 1852, Urospora speciosa (Carmichael) Leblond ex G.Hamel 1931, (Known from a single collection at Kalk Bay)

Order: Ulvales

Family: Ulvaceae

• Blidingia marginata (J.Agardh) P.J.L.Dangeard 1958, syn. Enteromorpha marginata J.Agardh 1842, Enteromorpha nana var. marginata (J.Agardh) V.J.Chapman 1956, (Kraalbaai, Langebaan lagoon)
• Blidingia minima (Nägeli ex Kützing) Kylin 1947, syn. Enteromorpha minima Nägeli ex Kützing 1849, Enteromorpha compressa var. minima (Nägeli ex Hauck) Hamel 1931, Enteromorpha nana var. minima (Nägeli ex Hauck) Sjøstedt 1939, (Kraalbaai, Langebaan lagoon to False Bay, and Eastern Cape)
• Chloropelta caespitosa Tanner 1980, (Kalk Bay and Cape Hangklip)
• Enteromorpha atroviridis (Levring) M.J.Wynne 1986, syn. Ulva atroviridis Levring 1938, (Namibia to Oudekraal, Cape Peninsula)
• Percursaria percursa (C.Agardh) Rosenvinge 1893, syn. Zignoa percursa (C.Agardh) Trevisan, Conferva percursa C.Agardh 1817, Enteromorpha percursa (C.Agardh) J.Agardh 1842, (Cape Peninsula – Glencairn, Scarborough, Mouille Point)
• Ulva flexuosa Wulfen 1803, syn. Enteromorpha flexuosa (Wulfen) J.Agardh 1883, (Muizenberg and Dalebrook, False Bay and Eastern Cape)
• Ulva intestinalis Linnaeus 1753, syn. Conferva intestinalis (Linnaeus) Roth 1797, Tetraspora intestinalis (Linnaeus) Desvaux 1818, Scytosiphon intestinalis (Linnaeus) Lyngbye 1819, Enteromorpha intestinalis (Linnaeus) Nees 1820, Fistularia intestinalis (Linnaeus) Greville 1824, Solenia intestinalis (Linnaeus) C.Agardh 1824, Ilea intestinalis (Linnaeus) Leiblein 1827, Hydrosolen intestinalis (Linnaeus) Martius 1833, Ulva enteromorpha var. intestinalis (Linnaeus) Le Jolis 1863, Ulva bulbosa var. intestinalis (Linnaeus) Hariot 1889, Enteromorpha compressa var. intestinalis (Linnaeus) Hamel 1931, (Widespread on west and south coasts, along entire South African coast)
• Ulva lactuca Linnaeus 1753, syn. Phyllona lactuca (Linnaeus) F.H.Wiggers 1780, Ulva fasciata Delile 1813, (Saldanha Bay, False Bay eastwards into Mozambique)
• Ulva linza Linnaeus 1753, syn. Solenia linza (Linnaeus) C.Agardh 1824, Enteronia linza (Linnaeus) Chevallier 1836, Phycoseris linza (Linnaeus) Kützing 1843, Enteromorpha linza (Linnaeus) J.Agardh 1883, (Namibia to False Bay)
• Ulva prolifera O.F.Müller 1778, syn. Ulva enteromorpha f. prolifera (O.F.Müller) Van Heurck, Ulva compressa var. prolifera (O.F.Müller) C.Agardh 1823, Enteromorpha compressa var. prolifera (O.F.Müller) Greville 1830, Enteromorpha prolifera (O.F.Müller) J.Agardh 1883, (Namibia to Eastern Cape)
• Ulva rhacodes (Holmes) Papenfuss 1960, syn. Enteromorpha rhacodes Holmes 1894, (False Bay to Eastern Cape)
• Rigid sea lettuce Ulva rigida C.Agardh 1823, syn. Phycoseris rigida (C.Agardh) Kützing 1843, Ulva lactuca var. rigida (C.Agardh) Le Jolis 1863, (Cape Peninsula to tropical East Africa)
• Ulva uncialis (Kützing) Montagne 1850, syn. Phycoseris uncialis Kützing 1849, Ulva capensis Areschoug 1851, (Namibia to Cape Agulhas)

Family: Ulvellaceae

• Ulvella sp. indet (Port Nolloth to Yzerfontein)

Division: Heterokonta — Class: Phaeophyceae — Brown seaweeds

Order: Cutleriales

Family Cutleriaceae

• Aglaozonia sp. (Muizenberg, False Bay. Brandfontein. Bird Island, eastern Cape)

Order: Desmarestiales

Family Desmarestiaceae

• Acid weed Desmarestia firma (C.Agardh) Skottsberg in Nordenskjöld 1907, syn. Sporochnus herbaceus var. firma C.Agardh 1824, (Möwe Bay, Namibia to Betty’s Bay. Doubtful record for Cape Agulhas)

Order: Dictyotales

Family Dictyotaceae

• Canistrocarpus cervicornis (Kützing) De Paula & De Clerck in De Clerck et al. 2006, syn. Dictyota cervicornis Kützing 1859, (Mission Rocks northwards into Mozambique)
• Dictyopteris delicatula J.V.Lamouroux 1809, syn. Neurocarpus delicatulus (J.V.Lamouroux) Kuntze, Haliseris delicatula (J.V.Lamouroux) C.Agardh 1820. (Isipingo northwards)
• Smooth-tongued dictyopteris Dictyopteris ligulata (Suhr) O.C.Schmidt 1938, syn. Haliseris ligulata Suhr 1834, (Black Rock (Umpangazi?), Natal to Koppie Allen, De Hoop Nature Reserve. Rare on west coast, only collected from Brandfontein)
• Dictyopteris macrocarpa (Areschoug) O.C.Schmidt 1938, syn. Haliseris macrocarpa Areschoug 1847, Neurocarpus macrocarpus (Areschoug) Kuntze 1891, (Port Alfred northwards to Mozambique)
• Dictyota ciliolata Sonder ex Kützing 1859, (Mabibi northwards into Mozambique)
• Dictyota dichotoma (Hudson) J.V.Lamouroux 1809, syn. Ulva dichotoma Hudson 1762, Zonaria dichotoma (Hudson) C.Agardh 1817, Fucus dichotomus (Hudson) Bertolini 1819, Haliseris dichotoma (Hudson) Sprengel 1827, Dichophyllium dichotomum (Hudson) Kützing 1843,(Langebaan and False Bay to Natal. D. dichotoma var. intricata (C.Agardh) Greville 1830, common at Kalk Bay and Dalebrook, and occurring more or less throughout the range of the species)
• Dictyota friabilis Setchell 1926, (Northern KwaZulu-Natal)
• Dictyota humifusa Hörnig, Schnetter & Coppejans in Hörnig et al. 1992, (Isipingo northwards into Mozambique)
• Dictyota liturata J.Agardh 1848, (Kommetjie on Cape Peninsula to Umhlali in KwaZulu-Natal)
• Spotted dictyota Dictyota naevosa (Suhr) Montagne 1840, syn. Zonaria naevosa Suhr 1834, Cutleria naevosa (Suhr) Hering ex Krauss 1846, (Die Walle to Umhlali, KwaZulu-Natal)(Cape Peninsula eatward into KwaZulu-Natal as far as Mission Rocks)
• Distromium skottsbergii Levring 1940, (Protea banks in southern KwaZulu-Natal)
• Multi-fanned zonaria Exallosorus harveyanus (Pappe ex Kützing) J.A.Phillips, 1997. Syn. Zonaria harveyana (Pappe ex Kützing) Areschoug 1851, (Platbank, False Bay to KwaZulu-Natal as far north as Park Rynie. Endemic)
• Lobophora variegata (J.V.Lamouroux) Womersley ex E.C.Oliveira 1977, syn. Dictyota variegata J.V.Lamouroux 1809, Zonaria variegata (J.V.Lamouroux) C.Agardh 1817, Gymnosorus variegatus (J.V.Lamouroux) J.Agardh 1894, Pocockiella variegata (J.V.Lamouroux) Papenfuss 1943, (East London eastward into Mozambique)
• Padina boryana Thivy in W.R. Taylor 1966, (The Haven about 150km west of Port St. Johns eastward into Mozambique)
• Rugulopteryx suhrii (Kützing) De Clerck & Coppejans in De Clerck et al. 2006, syn. Dictyota marginata Areschoug 1851, Dictyota suhrii G.Murray 1888, Stoechospermum suhrii Kützing 1859, (Algoa Bay eatwards into KwaZulu-Natal as far north as Isipingo)
• Spatoglossum asperum J.Agardh 1894, (Isipingo northward)
• Stoechospermum polypodioides (J.V.Lamouroux) J.Agardh 1848, syn. Dictyota polypodioides J.V.Lamouroux 1809, (Mapelane near St. Lucia northward into Mozambique)
• Stypopodium multipartitum (Suhr) P.C.Silva in P.C.Silva, Basson & Moe 1996, syn. Zonaria multipartita Suhr 1834, Cutleria multipartita (Suhr) Hering 1846, Orthosorus multipartitus (Suhr) Trevisan 1849, Spatoglossum multipartitum (Suhr) Kützing 1849, (Arniston eastward into Mozambique)
• Articulated zonaria Zonaria subarticulata (J.V.Lamouroux) Papenfuss 1944, Dictyota subarticulata J.V.Lamouroux 1809, Padina interrupta (Lamouroux) Bory de Saint-Vincent 1827, Phycopteris interrupta (Lamouroux) Kützing 1849, Orthosorus interruptus (Lamouroux) Trevisan 1849, (False Bay eastward to Mozambique)

Order: Ectocarpales

Family: Acinetosporaceae

• Acinetospora crinita (Carmichael) Sauvageau 1899, syn. Acinetospora pusilla var. crinita (Carmichael) Batters, Ectocarpus crinitus Carmichael 1833, (False Bay, Eastern Cape)
• Feldmannia irregularis (Kützing) G.Hamel 1939, syn. Ectocarpus irregularis Kützing 1845, Giffordia irregularis (Kützing) Joly 1965, Hincksia irregularis (Kützing) Amsler 1991, (Cape Peninsula, Langebaan lagoon and Eastern Cape)
• Hincksia granulosa (Smith) P.C.Silva in P.C.Silva, E.G.Meñez & R.L.Moe 1987, Conferva granulosa Smith 1811, Ectocarpus granulosus (Smith) C.Agardh 1828, Giffordia granulosa (Smith) G.Hamel 1939, (Muizenberg and Oudekraal, also Namibia)

Family Chordariaceae

• Asperococcus compressus A.W.Griffiths ex W.J.Hooker 1833, (Table Bay)
• Brown brains Leathesia marina (Lyngbye) Decaisne 1842, syn. Chaetophora marina Lyngbye 1819, Leathesia difformis (Linnaeus) J.E. Areschoug 1847, (All South African coasts: common on west coast, internittent in eastern Cape and KwaZulu-Natal)
• Myriocladia capensis J. Agardh 1848, (Port Nolloth to De Hoop Nature Reserve, endemic)
• Myriogloea abbreviata Kylin 1940, (Sea Point to Port Nolloth, endemic)
• Myriogloea papenfussii Kylin 1940, (False Bay to Melkbosstrand, endemic)
• Myrionema cf. magnusii (Sauvageau) Loiseaux 1967, syn. Ascocyclus magnusii Sauvageau 1927, (Glencairn)
• Papenfussiella gracilis Kylin 1940, (Platboombaai to Swakopmund, Namibia. Endemic to southern Africa)
• Streblonema codii vel. aff. Barton 1896, (Betty’s Bay)
• Streblonema cf. nemastomae Baardseth 1941, (Port Nolloth, Hondeklipbaai)
• Streblonema transfixum Setchell & Gardner 1922b, (Port Nolloth and Hondeklip Bay)
• Zeacarpa leiomorpha Anderson, Simons & Bolton 1988, (Yzerfontein to Dalebrook, Probably more widespread)

Family Chordariopsidaceae

• Cape cord weed Chordariopsis capensis (C.Agardh) Kylin 1940, syn. Chordaria flagelliformis var. capensis C.Agardh 1824, (Cape Frio, Namibia to at least Arniston)

Family Ectocarpaceae

• Ectocarpus acutus Setchell & Gardner 1922c, (Olifantsbos to Hondeklipbaai)
• Ectocarpus fasciculatus Harvey 1841, (Melkbosstrand to De Hoop)
• Ectocarpus siliculosus (Dillwyn) Lyngbye 1819, syn. Conferva siliculosa Dillwyn 1809, Ceramium siliculosum (Dillwyn) C.Agardh 1811, Ectocarpus confervoides f. siliculosus (Dillwyn) Kjellman 1872, Ectocarpus confervoides var. siliculosus (Dillwyn) Farlow 1881, (Port Nolloth to Eastern Cape)

Family: Pylaiellaceae

• Bachelotia antillarum (Grunow) Gerloff 1959, syn. Ectocarpus antillarum Grunow 1867, Pylaiella antillarum (Grunow) De Toni 1895, (False Bay to KwaZulu-Natal)

Family Scytosiphonaceae

• Chnoospora minima (Hering) Papenfuss 1956, syn. Fucus minimus Hering 1841, (Dwesa (about 80 km west of Poert St. Johns) eastward into Mozambique)
• Oyster thief Colpomenia sinuosa (Mertens ex Roth) Derbès & Solier in Castagne 1851, syn. Ulva sinuosa Mertens ex Roth 1806, Encoelium sinuosum (Mertens ex Roth) C.Agardh 1820, Stilophora sinuosa (Mertens ex Roth) C.Agardh 1827, Asperococcus sinuosus (Mertens ex Roth) Bory de Saint-Vincent 1832, Asperococcus sinuosus (C.Agardh) Zanardini 1841, Hydroclathrus sinuosus (Mertens ex Roth) Zanardini 1843, (Throughout South Africa)
• Compsonema cf. sessile Setchell & Gardner 1922a, (Oudekraal)
• Endarachne Endarachne binghamiae J.Agardh 1896′ (False Bay eastwards to KwaZulu-Natal as far as Port Edward)
• Hydroclathrus clathratus (C.Agardh) M.A.Howe in N.L.Britton & C.F.Millspaugh 1920, syn. Encoelium clathratum C.Agardh 1823, Stilophora clathrata (C.Agardh) C.Agardh 1827, Asperococcus clathratus (C.Agardh) J.Agardh 1848, (Northern KwaZulu-Natal from Sodwana northward)
• Starred cushion Iyengaria stellata (Børgesen) Børgesen 1939, syn. Rosenvingea stellata Børgesen 1928, Colpomenia stellata (Børgesen) Børgesen 1930, (Southern Cape Peninsula to KwaZulu-Natal)
• Petalonia fascia (O.F.Müller) Kuntze 1898, syn. Fucus fascia O.F.Müller 1778, Laminaria fascia (O.F.Müller) C.Agardh 1817, Ulva fascia (O.F.Müller) Lyngbye 1819, Ilea fascia (O.F.Müller) Fries 1835, Phyllitis fascia (O.F.Müller) Kützing 1843, Saccharina fascia (O.F.Müller) Kuntze 1891, (Yzerfontein to Soetwater)
• Scytosiphon lomentaria (Lyngbye) Link 1833, Chorda lomentaria Lyngbye 1819, Scytosiphon filum var. lomentarius (Lyngbye) C.Agardh 1820, Fucus lomentarius (Lyngbye) Sommerfelt 1826, Scytosiphon simplicissimus (Clemente) Cremades 1990, Ulva simplicissima Clemente 1807, (Simon’s Town to Lüderitz)
• Sausage skins Scytosiphon simplicissimus (Clemente) Cremades in Cremades et Perez-Cirera 1990, syn. Ulva simplicissima Clemente 1807, (Simon’s Town in False Bay to Lüderitz in Namibia)

Order: Fucales

Family Bifurcariopsidaceae

• Upright wrack Bifurcariopsis capensis (Areschoug) Papenfuss 1940a, syn. Fucodium capense Areschoug 1854, (Cape Infanta to Groen River)

Family Sargassaceae

• Long-leafed sargassum Anthophycus longifolius (Turner) Kützing, 1849 syn. Fucus longifolius Turner 1809, Sargassum longifolium (Turner) C.Agardh 1820, Carpophyllum longifolium (Turner) De Toni 1895, (Platboombaai eastwards as far as Uvongo in southern KwaZulu-Natal)
• Constricted axils Axillariella constricta (J.Agardh) P.C.Silva 1959b, syn. Fucodium constrictum J.Agardh 1848, Ascophyllum constricta (J.Agardh) Kuntze 1891, Ascophylla constricta (Kützing) Kuntze 1891, (Cape Peninsula to Cape Columbine)
• Hanging wrack Brassicophycus brassicaeformis (Kützing) Draisma, Ballesteros, F.Rousseau & T.Thibaut 2010, syn. Pycnophycus brassicaeformis Kützing 1860, Bifurcaria brassicaeformis (Kützing) E.S.Barton 1893, (Cape Agulhas to Sea Point)
• Cystophora fibrosa Simons, 1970, (De Walle to Koppie Allen, and Platboom)
• Hormophysa cuneiformis (J.F.Gmelin) P.C.Silva in P.C. Silva, Meñez & Moe 1987, syn. Fucus cuneiformis J.F.Gmelin 1792, (Rabbit Rock in northern KwaZulu-Natal northwards)
• Polycladia myrica (S.G.Gmelin) Draima, Ballesteros, F.Rousseau & T.Thibaut 2010, syn. Fucus myrica S.G.Gemlin 1768, Cystoseira myrica (S.G.Gmelin) C.Agardh 1820, (as C.myrica, Mission Rocks in KwaZulu-Natal northwards into Mozambique)
• Sargassum aquifolium (Turner) C.Agardh 1820, syn. Fucus aquifolius Turner 1807, Sargassum crassifolium J.Agardh 1848, (Sodwana northwards)
• Sargassum elegans Suhr, 1840, (False Bay to Mozambique. Endemic to southern Africa)
• Sargassum incisifolium (Turner) C.Agardh 1820, syn. Fucus incisifolius Turner 1811, Sargassum heterophyllum (Turner) C.Agardh, 1820, (False Bay eastward into Mozambique. Restricted to Southern Africa and Madagascar)
• Turbinaria ornata (Turner) J.Agardh 1848, syn. Fucus turbinatus var. ornata Turner 1807, Sargassum turbinatum var. ornatum (Turner) C.Agardh 1821, (Common from Sodwana Bay northwards but extending south as far as Durban)

Order: Laminariales

Family Laminariaceae

• Split-fan kelp Laminaria pallida Greville in J. Agardh 1848, Hafgygia pallida (Greville) Areschchoug 1883, Saccharina pallida (Greville) Kuntze 1891, (Danger Point to Cape Nolloth, as the schinzii form to at least Rocky Point in northern Namibia)
• Bladder kelp Macrocystis angustifolia Bory de Saint-Vincent 1826, (Occasional in drift in False Bay. Attached from Cape Point to Paternoster)

Family Lessoniaceae

• Sea bamboo Ecklonia maxima (Osbeck) Papenfuss 1940b, syn. Fucus maximus Osbeck 1757, (Papenkuilsfontein 10 km west of Cape Agulhas to north of Lüderitz, Namibia)
• Spined kelp Ecklonia radiata (C.Agardh) J.Agardh 1848, Laminaria radiata C.Agardh 1817, Capea radiata (C.Agardh) Endlicher 1843, (Forms with long stipes and rugose blades in False Bay, Spinose forms common at Die Dam, Otherwise species common from Koppie Allen to Southern Natal. Longer stiped smooth bladed form as far east as parts of Zululand)(Deep water populations extend to Sodwana Bay at depths up to 60m)

Order: Ralfsiales

Family Neoralfsiaceae

• Neoralfsia expansa (J.Agardh) P.-E.Lim & H.Kawai ex Kraft 2009, syn. Myrionema expansum J.Agardh 1847, Ralfsia expansa (J.Agardh) J.Agardh 1848, (unclear distribution)

Family Ralfsiaceae

• Ralfsia Ralfsia verrucosa (Areschoug) J.Agardh 1848, syn. Cruoria verrucosa Areschoug 1843, (Common on all west coast shores and probably throughout the Agulhas marine province)

Order: Scytothamnales

Family Splachnidiaceae

• Dead man’s fingers Splachnidium rugosum (Linnaeus) Greville 1830, (Dominant in mid-shore throughout west coast, Lüderitz, Namibia to eastern Cape)

Order: Sphacelariales

Family Sphacelariaceae

• Sphacelaria brachygonia Montagne 1843, (St. James and Strandfontein, False Bay, More frequent on south coast as far as Transkei)
• Sphacelaria rigidula Kützing 1843, (Kalk Bay in False Bay to at least Transkei)

Family Stypocaulaceae

• Phloiocaulon squamulosum (Suhr) Geyler 1866, (Betty’s Bay to East London. Endemic)
• Stypocaulon funiculare (Montagne) Kützing 1849, (Port Nolloth to Cape Agulhas and Tsitsikamma)

Order: Sporochnales

Family Sporochnaceae

• Carpomitra costata (Stackhouse) Batters 1902, (Algoa Bay. Vulcan Rock, Hout Bay)
• Sporochnus pedunculatus (Hudson) C. Agardh 1820, (Strandfontein)

Kingdom: Protista — Subkingdom: Biciliata — Infraregnum: Incertae sedis — Phylum(?): Rhodophyta — Red seaweeds

Class: Bangiophyceae

Order: Bangiales

Family Bangiaceae

• Bangia atropurpurea (Mertens ex Roth) C.Agardh 1824, syn. Conferva atropurpurea Mertens ex Roth 1806, Oscillatoria atropurpurea (Roth) C.Agardh 1817, Bangia fuscopurpurea var. atropurpurea (Roth) Lyngbye 1819, Bangia atropurpurea (Mertens ex Roth) C.Agardh 1824, Bangiella atropurpurea (Roth) Gaillon 1833, Bangiadulcis atropurpurea (Roth) W.A.Nelson 2007, (Cosmopolitan)
• Porphyra capensis Kützing 1843, (Abundant on whole of west coast extending into Namibia and along south coast of Western and Eastern Cape. Endemic)
• Pyropia gardneri (G.M.Smith & Hollenberg) S.C.Lindstrom in Sutherland et al. 2011, syn. Porphyrella gardneri G.M.Smith & Hollenberg 1943, Porphyra gardneri (G.M.Smith & Hollenberg) M.W.Hawkes 1977, (Cape of Good Hope to Brandfontein)
• Pyropia saldanhae (Stegenga, J.J.Bolton & R.J.Anderson) J.E.Sutherland in Sutherland et al. 2011, syn. Porphyra saldanhae Stegenga, Bolton & R.J.Anderson 1997, (Hondeklip Bay and Olifantsbos, endemic)

Order: Porphyridiales

Family Phragmonemataceae

• Neevea cf. repens Batters 1900, (Hout Bay)

Class: Compsopogonophyceae

Order: Erythropeltidales

Family Erythrotrichiaceae

• Erythrocladia cf. polystromatica P.J.L.Dangeard 1932, (St James, False Bay and Cape Hangklip)
• Erythrotrichia carnea (Dillwyn) J.Agardh 1883, syn. Erythrocladia carnea, Conferva carnea Dillwyn 1807, Bangia ciliaris subsp. pulchella (Harvey) De Toni 1897, (Probably fairly common, but South African distribution uncertain)
• Erythrotrichia welwitschii (Ruprecht) Batters 1902, syn. Cruoria welwitschii Ruprecht 1850, (Cape of Good Hope and False Bay extending eastwards at least as far as Port Elizabeth)
• Membranella africana Stegenga, Bolton & Anderson 1997, (Cape of Good Hope at least as far as Port Alfred)
• Porphyrostromium boryanum (Montagne) P.C.Silva in Silva, Basson & Moe 1996, Porphyra boryana Montagne 1846, Erythrotrichia boryana (Montagne) Berthold 1882, Phyllona boryana (Montagne) Kuntze 1891, Erythrotrichopeltis boryana (Montagne) Kornmann 1984, Porphyrostromium boryanum (Montagne) M.J.Wynne 1986, (Yzerfontein to Oatlands Point, False Bay)
• Sahlingia subintegra (Rosenvinge, 1909) Kornmann 1989, syn. Erythrocladia subintegra Rosenvinge 1909, Erythrocladia irregularis f. subintegra (Rosenvinge) Garbary, Hansen & Scagel 1981. Erythropeltis subintegra (Rosenvinge) Kornmann & Sahling 1985, Erythrotrichopeltis subintegra (Rosenvinge) Kornmann & Sahling 1985, (Worldwide – probably widely distributed in SA )

Class: Florideophyceae

Order: Acrochaetiales

Family Acrochaetiaceae

• Acrochaetium brebneri (Batters) G.Hamel 1928, syn. Rhodochorton brebneri Batters 1897, Chantransia brebneri (Batters) Rosenvinge 1909, Audouinella brebneri (Batters) P.S.Dixon 1976, (False Bay side of the Cape Peninsula)
• Acrochaetium balliae (Stegenga), nom. illeg. syn. Audouinella balliae Stegenga 1985, (Port Nolloth to Hout Bay)
• Acrochaetium catenulatum M.A.Howe 1914, (Namibia to Eastern Cape)
• Acrochaetium endozoicum (Darbishire) Batters 1902, syn. Chantransia endozoica Darbishire 1899, Rhodochorton endozoicum (Darbishire) Drew 1928, Audouinella endozoica (Darbishire) P.S.Dixon 1976, (Cape Peninsula)
• Acrochaetium moniliforme (Rosenvinge) Børgesen 1915, Chantransia moniliformis Rosenvinge 1909, Rhodochorton moniliforme (Rosenvinge) Drew 1928, Kylinia moniliformis (Rosenvinge) Kylin 1944, Chromastrum moniliforme (Rosenvinge) Papenfuss 1945, Audouinella moniliformis (Rosenvinge) Garbary 1979, (False Bay eastward at least as far as Transkei)
• Acrochaetium plumosum (K.M.Drew) G.M.Smith 1944, syn. Colaconema plumosum (Drew) Woelkerling 1971, Rhodochorton Plumosum Drew 1928, (Hondeklip Bay to Betty’s Bay)
• Acrochaetium reductum (Rosenvinge) G.Hamel 1927, syn. Chantransia reducta Rosenvinge 1909, (Between False Bay and Plettenberg Bay)
• Acrochaetium secundatum (Lyngbye) Nägeli 1858, syn. Callithamnion daviesii var. secundatum Lyngbye 1819, (Namibia to False Bay)
• Acrochaetium tenuissimum (F.S.Collins) Papenfuss 1945, syn. Chantransia virgatula f. tenuissima F.S.Collins in Collins, Holden & Setchell 1900, (Groot Bergriver estuary in Velddrif and Estuarine environment in Transkei)
• Audouinella occulta H.Stegenga 1985, (Hout Bay)
• Audouinella monorhiza (Stegenga) Garbary 1987, syn. Colaconema monorhiza Stegenga 1985, (Noordhoek and Olifantsbos, Cape Peninsula)
• Audouinella pectinata (Kylin) Papenfuss 1945, syn. Chantransia pectinata Kylin, 1906, (Doring Bay to Olifantsbos)
• Audouinella spongicola (Weber-van Bosse) Stegenga 1985, syn. Acrochaetium spongicola Weber-van Bosse 1921, (Hout Bay to Bird Island, Eastern Province)

Order Balliales

Family Balliaceae

• Ballia callitricha (C.Agardh) Kützing 1843, syn. Sphacelaria callitricha C.Agardh 1824, (West side of Cape Peninsula to Cape Agulhas)
• Ballia sertularioides (Suhr) Papenfuss 1940, syn. Callithamnion sertularioides Suhr 1840, (Lüderitz in Namibia to Hout Bay, Southern African endemic)

Order Bonnemaisoniales

Family Bonnemaisoniaceae

• Asparagopsis armata Harvey 1855syn. Falkenbergia rufolanosa (Harvey) F.Schmitz in Engler & Prantl 1897, (Platbank, Cape Peninsula eastwards)
• Asparagopsis taxiformis (Delile) Trevisan de Saint-Léon 1845, syn. Fucus taxiformis Delile 1813, Lictoria taxiformis (Delile) J.Agardh 1841, (Scottburgh, Common north of Cape Vidal)
• Bonnemaisonia hamifera Hariot 1891, (Known from one collection at Strandfontein, False Bay)
• Delisea flaccida (Suhr) Papenfuss 1940, syn. Sphaerococcus flaccidus Suhr 1834, (Olifantsbos on the Cape Peninsula eastwards)

Order Ceramiales

Family Callithamniaceae

• Aglaothamnion hookeri (Dillwyn) Maggs & Hommersand 1993, syn. Conferva hookeri Dillwyn 1809, Callithamnion hookeri (Dillwyn) S.F.Gray 1821, (Namibia to East London)
• Aglaothamnion tripinnatum (C.Agardh) Feldmann-Mazoyer 1941, syn. Callithamnion tripinnatum C.Agardh 1828, Phlebothamnion tripinnatum (C.Agardh) Kützing 1849, (Brandfontein, and south coast as far as East London)
• Callithamnion cordatum Børgesen 1909, (Cape Hangklip to Kowie River)
• Callithamnion exiguum Stegenga, Bolton & R.J.Anderson 1997, (Betty’s Bay)
• Callithamnion stuposum Suhr 1840, syn. Phlebothamnion stuposum (Suhr) Kützing 1843, Spongoclonium stuposum (Suhr) De Toni 1903, (Swartklip to KwaZulu-Natal)
• Callithamnion sp. indet. (Cape Peninsula to East London)
• Heteroptilon pappeanum (Kützing) Hommersand in Hommersand, D.W. Freshwater, J. López-Bautista, & S. Fredericq 2006, syn. Euptilota pappeana Kützing 1849, (Hondeklipbaai to Cape Agulhas, endemic)
• Heteroptilon rigidulum (De Clerck, Bolton, R.J.Anderson & Coppejans) Hommersand & De Clerck in Hommersand, D.W. Freshwater, J. López-Bautista, & S. Fredericq 2006, syn. Aglaothamnion rigidulum De Clerck, Bolton, R.J.Anderson & Coppejans 2004, (as Aglaothamnium rigidulum, Port Edward to Palm Beach, endemic)

Family Ceramiaceae

• Antithamnion diminuatum var. polyglandulum Stegenga 1986, (Olifantsbos in the southern Cape Peninsula eastward to KwaZulu-Natal)
• Antithamnion pseudoarmatum Stegenga 1986, (Olifantsbos and Brandfontein, endemic)
• Antithamnion sp. indet. (Cape Hangklip)
• Antithamnionella spirographidis (Schiffner) E.M.Wollaston 1968, syn. Antithamnion spirographidis Schiffner 1916, Irtugovia spirographidis (Schiffner) Perestenko 1994, (Kraalbaai)
• Antithamnionella tasmanica Wollaston 1968, (Kalk Bay to Kowie River)
• Antithamnionella tormentosa Stegenga 1986, (Cape Peninsula from Three Anchor Bay to Muizenberg, endemic)
• Antithamnionella verticillata (Suhr) Lyle 1922, syn. Callithamnion vertillatum Suhr 1840, Antithamnion verticillatum (Suhr) De Toni 1903, (Swartklip in False Bay to Transkei)
• Balliella crouanioides (Itono) Itono & T.Tanaka 1973, syn. Antithamnion crouanioides Itono 1971, (Aliwal shoal northwards)
• Bornetia repens Stegenga 1985, (Swartklip in False Bay to Transkei, possibly KwaZulu-Natal)
• Callithamniella capensis Simons 1970, (Muizenberg to East London, endemic)
• Callithamnion stuposum Suhr 1840, syn. Phlebothamnion stuposum (Suhr) Kützing 1843, Spongoclonium stuposum (Suhr) De Toni 1903, (Rare on weat coast, common on south coast and KwaZulu-Natal at least as far north as Mabibi)
• Carpoblepharis flaccida (J.V.Lamouroux) Kützing 1849, syn. Ptilota flaccida (J.V.Lamouroux) C.Agardh 1822, Delesseria flaccida J.V.Lamouroux 1813, (Namibia to the Kei river, Southern African endemic)
• Carpoblepharis minima E.S.Barton 1893, (Möwe Bay in Namibia to Buffels Bay on the Cape Peninsula)
• Centroceras clavulatum (C.Agardh) Montagne 1846, syn. Ceramium clavulatum C.Agardh 1822, Spyridia clavulata (C.Agardh) J.Agardh 1842, (Whole southern African coast)
• Centroceras distichum Okamura 1934, (Cape Hangklip)
• Ceramium arenarium Simons 1966, (Swakopmund in Namibia to East London, Southern African endemic)
• Ceramium atrorubescens Kylin 1938, (Swakopmund to Port Nolloth, Southern African endemic)
• Ceramium aff. callipterum Mazoyer 1938, (West side of southern Cape Peninsula)
• Ceramium camouii E.Y.Dawson 1944, (Cape Point eastwards along south coast)
• Ceramium capense Kützing 1841, (Lüderitz to Kommetjie, endemic)
• Ceramium centroceratiforme Simons 1966, (Cape Hangklip to Kei River, endemic)
• Ceramium dawsonii A.B.Joly 1957, (False Bay eastward along entire Cape south coast)
• Ceramium glanduliferum Kylin 1938, (Sea Point on Cape Peninsula eastward into KwaZulu-Natal, Southern African endemic)
• Ceramium obsoletum C.Agardh 1828, (From Namibia south and eastwards along the whole Cape South coast, South African endemic)
• Ceramium papenfussianum Simons 1966, (Primarily a West Coast species, endemic)
• Ceramium poeppigianum Grunow 1868, syn. Reinboldiella poeppigiana (Grunow) Feldmann & Mazoyer 1937, (Stilbaai to KwaZulu-Natal as far as Mission Rocks)
• Ceramium planum Kützing 1849, (Swakopmund in Namibia to False Bay. Southern African endemic)
• Ceramium tenerrimum (G.Martens) Okamura 1921, syn. Hormoceras tenerrimum G.Martens 1866, (Whole of Cape west coast and east to Knysna)
• Ceramium sp. indet. (Port Nolloth, endemic?)
• Compsothamnionella sciadophila Stegenga 1990, (Found once at Muizenberg, endemic)
• Crouania attenuata (C.Agardh) J.Agardh 1842, syn. Mesogloia attenuata C.Agardh 1824, (Kalk Bay eastwaerd into tropical East Africa)
• Crouania francescoi Cormaci, G.Furnari & Scammacca 1978, (False Bay eastwards to northern KwaZulu-Natal)
• Gayliella flaccida (Harvey ex Kützing) T.O.Cho & L.J.McIvor in Cho et al. 2008, syn. Hormoceras flaccidum Harvey ex Kützing 1862, Ceramium flaccidum (Harvey ex Kützing) Ardissone 1871, (as Ceramium flaccidum, probably widespread alongmost of the South African east coast)
• Grateloupia belangeri (Bory de Saint-Vincent) De Clerck, Gavio, Fredericq, Cocquyt & Coppejans 2005, syn. Iridaea belangeri Bory de Saint-Vincent 1834, Phyllymenia belangeri (Bory de Saint-Vincent) Setchell & N.L.Gardner 1936, (Whole west coast extending into Namibia. Southernmost record from Platboombaai, endemic)
• Laurenciophila minima Stegenga 1986, (Clovelly in False Bay to Kowie river, endemic)
• Microcladia gloria-spei Stegenga 1986, (Port Nolloth to Southern Cape Peninsula),
• Platythamnion capense Stegenga 1986, (Only known from Platboombaai, endemic)
• Pterothamnion recurvatum (Wollaston) Athanasiadis & Kraft 1994, syn. Platythamnion recurvatum E.M.Wollaston 1972, (Paternoster to Olifantsbos, Port Alfred)
• Seagriefia fasciculifera Stegenga, Bolton & R.J.Anderson 1997, (Just east of Cape Hangklip, endemic)
• Syringocolax macroblepharis Reinsch 1875, (Cape Agulhas to Morgan Bay near Kei Mouth, endemic)

Family Callithamniaceae

• Callithamnion collabens (Rudolphi) L.McIvor & Maggs 2002, syn. Asperocaulon collabens Rudolphi 1831, Aristothamnion collabens (Rudolphi) Papenfuss 1968, (Namibia to Port Alfred, Southern African endemic)
• Euptilota fergusonii A.D.Cotton 1907, (Sodwana Bay northwards)
• Euptilota molle (Wollaston) O.De Clerck 2004, syn. Thamnocarpus mollis Wollaston 1992, Carpothamnion molle (Wollaston) P.C.Silva 1996, (Only reported from southern KwaZulu Natal at Protea Banks and northern Eastern Cape, endemic)

Family Dasyaceae

• Dasya echinata Stegenga, Bolton & R.J.Anderson 1997, (Brandfontein, Strandfontein in False Bay, and Waterloo Bay in Eastern Cape, endemic)
• Dasya scoparia Harvey in J. Agardh 1841, (Lambert’s Bay to East London), (Lamberts Bay to Mabibi in northern KwaZulu-Natal)
• Dasya stanleyi (Weber-van Bosse) A.J.K.Millar 1996, syn. Dasyopsis stanleyi Weber-van Bosse 1913, Eupogodon stanleyi (Weber-van Bosse) P.C.Silva 1987, (Coral reef habitats in northern KwaZulu-Natal)
• Dipterocladia pinnatifolia (Suhr) Y.S.D.M.de Jong in De Jong, Prud’homme van Reine & Lokhorst 1997, (Probably restricted to Eastern Cape and extending into southern KwaZulu-Natal as far as Sottburgh, endemic)
• Heterosiphonia arenaria Kylin 1938, (Swartklip. Brandfontein, and Port Elizabeth to East London, endemic)
• Heterosiphonia crispa (Suhr) Falkenberg 1901, syn. Dasya crispa Suhr 1840, (Lamberts Bay to KwaZulu-Natal, endemic)
• Heterosiphonia dubia (Suhr) Falkenberg 1901, syn. Dasya dubia Suhr 1840, (Paternoster to KwaZulu-Natal, Southern African endemic)
• Heterosiphonia pellucida (Harvey) Falkenberg 1901, syn. Dasya pellucida Harvey 1849, (Lamberts Bay to Brandfontein, endemic)

Family Delesseriaceae

• Acrosorium acrospermum (J.Agardh) Kylin 1938, syn. Nitophyllum ascospermum J.Agardh 1852, (False Bay to Eastern Cape, endemic)
• Acrosorium maculatum (Sonder ex Kützing) Papenfuss 1940, syn. Aglaophyllum maculatum Sonder ex Kützing 1866, Nitophyllum uncinatum var. maculatum (Sonder ex Kützing) De Toni 1900, (Southern Cape Peninsula to KwaZulu-Natal)
• Acrosorium ciliolatum (Harvey) Kylin 1924, syn. Nitophyllum ciliolatum Harvey 1855, Aglaophyllum ciliolatum (Harvey) Kützing 1869, Nitophyllum venulosum Zanardini 1866, Acrosorium venulosum (Zanardini) Kylin 1924, (as A. venulosum, Kommetjie to KwaZulu-Natal) (as A. ciliatum, Kommetjie eastward extending into KwaZulu-Natal at least as far as Sodwana Bay)
• Apoglossum ruscifolium (Turner) J.Agardh 1898, syn. Fucus ruscifolius Turner 1802, Delesseria ruscifolia (Turner) J.V.Lamouroux 1813, (Oudekraal to Brandfontein)
• Augophyllum marginifructum” (R.E.Norris & M.J.Wynne) S.-M.Lin, Fredericq & Hommersand 2004, syn. Myriogramme marginifructa R.E.Norris & M.J.Wynne 1987, (Leadsman shoal northwards)
• Bartoniella crenata (J.Agardh ex Mazza) Kylin 1924, syn. Phitymophora crenata J.Agardh ex Mazza 1908, (Muizenberg and Cape Hangklip at least as far as Mission Rocks, endemic)
• Botryocarpa prolifera Greville 1830, (Namibia to southern Cape Peninsula)
• Botryoglossum platycarpum (Turner) Kützing 1843, syn. Fucus platycarpus Turner 1809, Delesseria platycarpa (Turner) J.V.Lamouroux 1813, Phyllophora platycarpa (Turner) Greville ex Krauss 1846, Nitophyllum platycarpum (Turner) J.Agardh 1876, (Namibia to Cape of Good Hope. Southern African endemic)
• Caloglossa leprieurii (Montagne) G.Martens 1869, syn. Delesseria leprieurii Montagne 1840, Hypoglossum leprieurii (Montagne) Kützing 1849, Caloglossa leprieurii (Montagne) J.Agardh 1876, (Langebaan lagoon, Berg river estuary. Also known from estuarine areas and mangrove vegetations of the Eastern Cape and KwaZulu-Natal)
• Delesseria papenfussii M.J.Wynne 1984, (Port Nolloth to Brandfontein. Southern African endemic)
• Erythroglossum sp. indet. (Glencairn to Hluleka, endemic)
• Gonimophyllum africanum M.T.Martin & M.A.Pocock 1953, (Table Bay to Kei River)
• Haraldiophyllum bonnemaisonii (Kylin) A.D.Zinova 1981, syn. Myriogramme bonnemaisonii Kylin 1924, Nitophyllum bonnemaisonii (Kylin) Kylin 1934, (Kommetjie to Muizenberg on the Cape Peninsula)
• Holmesia capensis J.Agardh 1890, (Brandfontein eastward, endemic)
• Hymenena venosa (Linnaeus) Krauss 1846, syn. Fucus venosus Linnaeus 1771, Delesseria venosa (Turner) J.V.Lamouroux 1813, (Namibia to southern Cape Peninsula)
• Martensia elegans Hering 1841, syn. Capraella elegans (Harvey) J.De Toni 1936, Mesotrema elegans (Hering) Papenfuss 1942, (Common south coast species, extending into KwaZulu-Natal at least as far as Sodwana Bay)
• Martensia flabelliformis Harvey ex J.Agardh 1863, syn. Capraella flabelliformis (Harvey) J.De Toni 1936, Neomartensia flabelliformis (Harvey ex J.Agardh) Yoshida & Mikami 1996, (Collected once from Sodwana Bay)
• Myriogramme eckloniae Stegenga, Bolton & R.J.Anderson 1997, (Drift material at Muizenberg, endemic)
• Myriogramme livida (J.D.Hooker & Harvey) Kylin 1924, syn. Nitophyllum lividum J.D.Hooker & Harvey 1845, Cryptopleura livida (J.D.Hooker & Harvey) Kützing 1868, (Swakopmund to Kommetjie)
• Myriogramme prostrata (E.Y.Dawson, Neushul & Wildman) M.J.Wynne 1990, syn. Haraldia prostrata E.Y.Dawson, Neushul & Wildman 1960, (Collected only from Sodwana Bay area)
• Neuroglossum binderianum Kützing 1843, (Namibia to southern Cape Peninsula)
• Nienburgia serrata (Suhr) Papenfuss 1956, syn. Nitophyllum serratum Suhr 1836, Scutarius serratus (Suhr) Kuntze 1891, (Cape Hangklip eastwards intoKwaZulu Natal at least as far as Umhloti, north of Durban, endemic)
• Papenfussia laciniata (Harvey) M.D. Guiry 2005?, syn. Pollexfenia laciniata Harvey 1844, (Both sides of the Cape Peninsula, endemic)
• Patulophycus eclipes A.J.K.Millar & M.J.Wynne 1992, (Frequently collected on deep reef systems in southern KwaZulu-Natal)
• Platyclinia sp. (Olifantsbos)
• Platysiphonia delicata (Clemente) Cremades in Cremades & Perez-Cirera 1990, syn. Conferva delicata Clemente 1807, Polysiphonia miniata (C.Agardh) Kützing 1849, (Known from eastern Atlantic, Indian Ocean, Australia and New Zealand. South African distribution not specified, but found in KwaZulu-Natal by implication.)
• Platysiphonia intermedia (Grunow) M.J.Wynne 1983, syn. Sarcomenia intermedia Grunow 1867, (Port Nolloth to Cape Agulhas)
• Pollexfenia minuta (Kylin) Papenfuss 1942, syn. Papenfussia minuta Kylin 1938, (Cape Hangklip to East London, endemic)
• Taenioma perpusillum (J.Agardh) J.Agardh 1863, syn. Polysiphonia perpusilla J.Agardh 1847, (Langebaan lagoon, and Eastern Cape)
• Delesseriaceae vel. aff. (Oudekraal, endemic)

Family Inkyuleeaceae

• Inkyuleea beckeri (F.Schmitz ex Mazza) H.-G.Choi, Kraft & G.W.Saunders 2000, syn. Ballia beckeri F.Schmitz ex Mazza 1911, (Possibly limited to southern KwaZulu-Natal and Eastern Cape, endemic)

Family Rhodomelaceae

• Acrocystis nana Zanardini 1872, (Northern KwaZulu-Natal from Island Rock onward)
• Aiolocolax pulchellus M.A.Pocock 1956, (Blaauwberg eastwards)
• Amansia rhodantha (Harvey) J.Agardh 1841, syn. Delesseria rhodantha Harvey 1834, Rytiphlaea rhodantha (Harvey) Decaisne 1842, (Primarily distributed in northern KwaZulu-Natal from Mabibi northwards, with a single collection at Park Rynie)
• Aphanocladia cf. skottsbergii (Levring) Ardré 1969, syn. Pterosiphonia skottsbergii Levring 1941, (Cape Hangklip)
• Bostrychia intricata (Bory de Saint-Vincent) Montagne 1852, syn. Scytonema intricatum Bory de Saint-Vincent 1828, Stictosiphonia intricata (Bory de Saint-Vincent) P.C.Silva 1996, (Saldanha Bay, Kommetjie on Cape Peninsula eastward along whole of south coast)
• Bostrychia moritziana (Sonder ex Kützing) J.Agardh 1863, syn. Polysiphonia moritziana Sonder ex Kützing 1849, (Langebaan lagoon, Mangrove vegetation along Transkei and KwaZulu-Natal coasts)
• Bostrychia scorpioides (Hudson) Montagne 1842, syn. Amphibia scorpioides (Hudson) Stackhouse, Fucus scorpioides Hudson 1762, Rhodomela scorpioides (Hudson) 1822, (Langebaan lagoon. mangrove vegetation along Transkei coast. Does not appear to extend into KwaZulu-Natal)
• Bostrychia tenella (J.V.Lamouroux) J.Agardh 1863, syn. Plocamium tenellum J.V.Lamouroux 1813, (Common along most of the KwaZulu-Natal coast, extending into Mozambique.)
• Chondria armata (Kützing) Okamura 1907, syn. Lophura armata Kützing 1866, (Entire KwaZulu-Natal coast extending into Eastern Cape at learst as far south as Bird Island, Algoa Bay)
• Chondria capensis (Harvey) Askenasy 1888, syn. Laurencia capensis Harvey 1849, Chondriopsis capensis (Harvey) J.Agardh 1863, (Namibia to just east of Cape Agulhas. Southern African endemic.)
• Colacopsis velutina (M.T.Martin & M.A.Pocock) R.E.Norris 1988, syn. Melanocolax velutina M.T.Martin & M.A.Pocock 1953, (Brandfontein to East London, endemic)
• Dasyclonium palmatifidum (Grunow) Scagel 1962, syn. Polyzonia palmatifida Grunow 1874, Euzoniella palmatifida (Grunow) Cuoghi Costantini 1912, (Primarily a south coast species, extending into KwaZulu-Natal as far as Shelly Beach, endemic)
• Dictyomenia stephensonii Papenfuss 1947, (Bashee river mouth (Mbashe) eastward into KwaZulu-Natal as far north as Umhlali Beach, endemic)
• Digenea simplex (Wulfen) C.Agardh 1822, syn. Conferva simplex Wulfen 1803, (Northern KwaZulu-Natal from Mission Rocks northward)
• Falkenbergiella capensis Kylin 1938, (St James, Muizenberg and Swartklip in False Bay. Cape south coast. Endemic)
• Halopithys subopaca (Simons) L.E.Phillips & De Clerck 2005, syn. Digeneopsis subopaca Simons 1970,(Southern Mozanbique and northern KwaZulu-Natal as far south as Mapelane)
• Herposiphonia didymosporangia Stegenga & Kemperman 1987, (St James, Brandfontein and coast of De Hoop nature reserve, Southern African endemic)
• Herposiphonia falcata (Kützing) De Toni 1903, syn. Polysiphonia falcata Kützing 1863, (Brandfontein, endemic)
• Herposiphonia heringii (Harvey) Falkenberg 1901, syn. Polysiphonia heringii Harvey 1847, (Between Hondeklipbaai and St James, endemic)
• Herposiphonia prorepens (Harvey) F.Schmitz 1895, syn. Polysiphonia prorepens Harvey 1847, (Cape Hangklip, Cape south coast to KwaZulu-Natal, endemic)
• Herposiphonia secunda (C.Agardh) Ambronn 1880, syn. Hutchinsia secunda C.Agardh 1824, Polysiphonia secunda (C.Agardh) Zanardini 1840, Herposiphonia tenella f. secunda (C.Agardh) Hollenberg 1968, (Muizenberg, Cape Agulhas eastward to the tropics)
• Janczewskia meridionalis M.T.Martin & M.A.Pocock 1953, (Brandfontein to Northern KwaZulu-Natal, endemic)
• Kentrophora natalensis (J.Agardh) S.M.Wilson & Kraft in R.J.F. Henderson, S.M. Wilson & Kraft 2001, syn. Kuetzingia natalensis J.Agardh 1863, Plectrophora natalensis (J.Agardh) Wilson & Kraft 2000, (From just south of the Eastern Cape/KwaZulu-Natal border eastward into Mozambique)
• Laurencia brongniartii J.Agardh 1841,(Protea Banks in southern KwaZulu-Natal to Saxon Reef near the Mozambique border)
• Laurencia complanata (Suhr) Kützing 1849, syn. Chondria complanata Suhr 1846,(Hluleka, Eastern Cape northward to southern Mozambique, Southern African endemic)
• Laurencia flexuosa Kützing 1849, (False Bay to KwaZulu-Natal at least as far north as Mabibi, endemic)
• Laurencia glomerata (Kützing) Kützing 1849, syn. Chondria glomerata Kützing 1847, (Port Nolloth?, Melbosstrand?, Cape Peninsula eastward)
• Laurencia natalensis Kylin 1938, syn. Laurencia obtusa var. natalensis (Kylin) Børgesen 1945, (Pearly Beach to Agulhas, more abundant along south and east coast, extending into southern Mozambique)
• Laurencia obtusa (Hudson) J.V.Lamouroux 1813, syn. Fucus obtusus Hudson 1778, Chondria obtusa (Hudson) C.Agardh 1817, Sphaerococcus obtusus (Hudson) Wahlenberg 1826, (Cape Hangklip, Brandfontein)
• Laurencia peninsularis Stegenga, Bolton & R.J.Anderson 1987, (False Bay to East London, endemic)
• Laurencia pumila (Grunow) Papenfuss 1943, syn. Laurencia flexuosa var. pumila Grunow 1867, (Tsitsikamma eastward into southern Mozambique)
• Neurymenia fraxinifolia (Mertens ex Turner) J.Agardh 1863, syn. Fucus fraxinifolius Mertens ex Turner 1809, Delesseria fraxinifolia (Mertens ex Turner) C.Agardh 1817, Amansia fraxinifolia (Mertens ex Turner) C.Agardh 1822, Dictyomenia fraxinifolia (Mertens ex Turner) J.Agardh 1841, Epineuron fraxinifolium (Mertens ex Turner) Harvey ex Kützing 1849, (Widespread in Indo-Pacific region, southern limit at Sodwana Bay in KwaZulu-Natal)
• Neurymenia nigricans T.Tanaka & Itono 1969, (KwaZulu-Natal from St Lucia northwards)
• Ophidocladus simpliciusculus (P.L.Crouan & H.M.Crouan) Falkenberg in Schmitz & Falkenberg 1897, syn. Polysiphonia simpliciuscula P.L.Crouan & H.M.Crouan 1852, (Hondeklipbaai?, Platboombaai on Cape Peninsula to Mozambique)
• Osmundaria melvillii (J.Agardh) R.E.Norris 1991, syn. Amansia melvillii J.Agardh 1885, Vidalia melvillii (J.Agardh) F.Schmitz 1895, (Tropical species extending as far south as Sodwana Bay in northern KwaZulu-Natal)
• Osmundaria serrata (Suhr) R.E.Norris 1991, syn. Carpophyllum serratum Suhr 1840, Dictyomenia serrata (Suhr) J.Agardh 1841, Spirhymenia serrata (Suhr) Harvey 1847, Vidalia serrata (Suhr) J.Agardh 1863, Euspiros serratus (Suhr) Kuntze 1891, (Port St. Johns eastward into KwaZulu-Natal as far as Mission Rocks)
• Pachychaeta brachyarthra (Kützing) Trevisan 1875, syn. Griffithsia brachyarthra Kützing 1860, (Cape Agulhas eastward)
• Pachychaeta cryptoclada Falkenberg 1901, (Swartklip, Brandfontein, more common in Eastern Cape, endemic)
• Placophora binderi (J.Agardh) J.Agardh 1863, syn. Amansia binderi J.Agardh 1841, Micramansia binderi (J.Agardh) Kützing 1865, (Kalk Bay on the Cape Peninsula extending along south and east coast to southern Mozambique)
• Placophora monocarpa (Montagne) Papenfuss 1956, syn. Polysiphonia monocarpa Montagne 1842, (Melkbosstrand to Strandfontein in False Bay, possibly further east, endemic)
• Polysiphonia incompta Harvey 1847, (Namibia, the entire South African coast into Mozambique)
• Polysiphonia kowiensis Stegenga, Bolton & R.J.Anderson 1997, (Langebaan Lagoon, Kowie estuary, endemic)
• Polysiphonia namibiensis Stegenga & Engeldow in Stegenga, Bolton & Anderson 1997, (Olifantsbos, Cape Agulhas, Eastern Cape. Southern African endemic)
• Polysiphonia scopulorum Harvey 1855, syn. Vertebrata scopulorum (Harvey) Kuntze 1891, Lophosiphonia scopulorum (Harvey) Womersley 1950, (Muizenberg and Clovelly in False Bay)
• Polysiphonia urbana Harvey 1847, (Port Nolloth to Cape Agulhas. Southern African endemic)
• Polysiphonia virgata (C.Agardh) Sprengel 1827, syn. Hutchinsia virgata C.Agardh 1824, Carradoria virgata (C.Agardh) Kylin 1956, Carradoriella virgata (C.Agardh) P.C.Silva 1996, (Namibia to Brandfontein)
• Polysiphonia sp.1 (Muizenberg, endemic)
• Polysiphonia sp.2 (Betty’s Bay, endemic)
• Polyzonia elegans Suhr 1834, (Port Alfred eastward through all KwaZulu-Natal into southern Mozambique)
• Pterosiphonia cloiophylla (C.Agardh) Falkenberg in Schmitz & Falkenberg 1897, syn. Rytiphlaea cloiophylla (C.Agardh) J.Agardh, Rhodomela cloiophylla C.Agardh 1822, Polysiphonia cloiophylla (C.Agardh) J.Agardh 1863, (Namibia, Cape west coast and Cape south coast)
• Pterosiphonia spinifera (Kützing) Ardré 1967, syn. Polysiphonia spinifera Kützing 1843, (Cape Hangklip, KwaZulu-Natal)
• Pterosiphonia stangeri (J.Agardh) Falkenberg 1901, syn. Polysiphonia stangeri J.Agardh 1863, Vertebrata stangeri (J.Agardh) Kuntze 1891, (Swartklip in False Bay, Cape south coast and KwaZulu-Natal. Southern African endemic)
• Pterosiphonia sp. indet. (Near Cape Hangklip, endemic)
• Rhodomelopsis africana M.A.Pocock 1953, (Brandfontein near Cape Agulhas, Cape south coast into KwaZulu-Natal and southern Mozambique.)
• Streblocladia camptoclada (Montagne) Falkenberg 1901, syn. Polysiphonia camptoclada Montagne 1837, (Yzerfontein to Clovelly in False Bay)
• Streblocladia corymbifera (C.Agardh) Kylin 1938, syn. Hutchinsia corymbifera C.Agardh 1828, Polysiphonia corymbifera (C.Agardh) Endlicher 1843, (Saldanha to St. James in False Bay)
• Stromatocarpus parasiticus Falkenberg in Schmitz & Falkenberg 1897, (Blaauwberg to Cape Hangklip, endemic)
• Symphyocladia cf. marchantioides (Harvey) Falkenberg in Schmitz & Falkenberg 1897, syn. Amansia marchantioides Harvey 1855, (Cape Hangklip, endemic)
• Tayloriella tenebrosa (Harvey) Kylin 1938, Polysiphonia tenebrosa Harvey 1847, (Doring Bay, Muizenberg and Glencairn in False Bay eastward, Southern African endemic)

Family Spyridiaceae

• Spyridia cupressina Kützing 1849, (Probably restricted to Eastern Cape and southern KwaZulu-Natal)
• Spyridia filamentosa (Wulfen) Harvey in Hooker 1833, syn. Fucus filamentosus Wulfen 1803, Hutchinsia filamentosa (Wulfen) C.Agardh 1824, Polysiphonia filamentosa (Wulfen) Sprengel 1827, Ceramium filamentosum (Wulfen) C.Agardh 1828, (Rare in Western Cape. False Bay, Eastern Cape to tropical East Africa)
• Spyridia hypnoides (Bory de Saint-Vincent) Papenfuss 1968, syn. Thamnophora hypnoides Bory de Saint-Vincent 1834, (Palm Beach to Black Rock near the Mozambican border)
• Spyridia plumosa F.Schmitz ex J.Agardh 1897, (Camps Bay, Kowie area, extending into KwaZulu-Natal as far as Shelly Beach, endemic)

Family Wrangeliaceae

• Anotrichium furcellatum (J.Agardh) Baldock 1976, syn. Griffithsia furcellata J.Agardh 1842, Neomonospora furcellata (J.Agardh) Feldmann-Mazoyer & Meslin 1939, Corynospora furcellata (J.Agardh) Levring 1974, (False Bay, Kowie)
• Anotrichium tenue (C.Agardh) Nägeli 1862, syn. Griffithsia tenuis C.Agardh 1828, (Doring Bay to Cape Agulhas and further east to KwaZulu-Natal)
• Griffithsia confervoides Suhr 1840, (Namibia to KwaZulu-Natal, Southern African endemic)
• Gymnothamnion elegans (Schousboe ex C.Agardh) J.Agardh 1892, syn. Callithamnion elegans Schousboe ex C.Agardh 1828, (Bakoven on Cape Peninsula to KwaZulu-Natal)
• Gymnothamnion elegans var. bisporum Stegenga 1986, (Hout Bay to East London, endemic)
• Hommersandiella humilis (Kützing) Alongi, Cormaci & G.Furnari 2007, syn. Callithamnion humile Kützing 1849, Lomathamnion humile (Kützing) Stegenga 1989, (Namibia to Cape Hangklip, Southern African endemic)
• Lomathamnion capense Stegenga 1984, (Cape Point to Arniston, endemic)
• Pleonosporium filicinum (Harvey ex J.Agardh) De Toni 1903, syn. Halothamnion filicinum Harvey ex J.Agardh 1876, (Swartklip in False Bay to Natal, Southern African endemic)
• Pleonosporium harveyanum (J.Agardh) De Toni 1903, syn. Halothamnion harveyanum J.Agardh 1876, (Namibia to East London, Southern African endemic)
• Pleonosporium paternoster Stegenga 1986, (Paternoster and Oudekraal, endemic)
• Pleonosporium ramulosum (J.Agardh) De Toni 1903, Corynospora ramulosa J.Agardh 1851, (Port Nolloth to southern Cape Peninsula, endemic)
• Ptilothamnion polysporum Gordon-Mills & Wollaston in Wollaston 1984; (Swartklip in False Bay to Mozambique)
• Shepleya elixithamnia Gordon-Mills & R.E.Norris 1986, (Reported only from a few places in southern KwaZulu-Natal and northern Eastern Cape, endemic)
• Spongoclonium caribaeum (Børgesen) M.J.Wynne 2005, syn. Mesothamnion caribaeum Børgesen 1917, Pleonosporium caribaeum (Børgesen) R.E.Norris 1985, (Clovelly in False Bay to KwaZulu-Natal, Widespread in tropical regions.)
• Tiffaniella cymodoceae (Børgesen) E.M.Gordon 1972, syn. Spermothamnion cymodoceae Børgesen 1952, (Platbank on Cape Peninsula to Mozambique)
• Tiffaniella schmitziana (E.S.Barton) Bolton & Stegenga 1987, syn. Spermothamnion schmitzianum E.S.Barton 1893, (Kraalbaai, Strandfontein, Port Elizabeth to Hluleka, endemic)
• Wrangelia argus (Montagne) Montagne 1856, syn. Griffithsia argus Montagne 1841, (Northern KwaZulu-Natal)
• Wrangelia penicillata (C.Agardh) C.Agardh 1828, syn. Griffithsia penicillata C.Agardh 1824, (Northern KwaZulu-Natal)
• Wrangelia purpurifera J.Agardh 1863, (Paternoster to Kowie River, endemic)

Order Colaconematales

Family Colaconemataceae

• Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton 1991, (Kommetjie eastward entire south coast and Eastern Cape)
• Colaconema codicola (Børgesen) H.Stegenga, J.J.Bolton, & R.J.Anderson 1997, (Kraalbaai in Langebaan lagoon, and Transkei)
• Colaconema daviesii (Dillwyn) Stegenga 1985, (Hondeklipbaai to Transkei)
• Colaconema desmarestiae (Kylin) P.W.Gabrielson 2004, syn. Acrochaetium desmarestiae Kylin 1925, Rhodochorton desmarestiae (Kylin) Drew 1928, Audouinella desmarestiae (Kylin) Garbary, G.I.Hansen & Scagel 1983, (as Audouinella desmarestiae, Northern Cape region)
• Colaconema endophyticum (Batters) J.T.Harper & G.W.Saunders 2002, syn. Acrochaetium endophyticum Batters 1896, Chantransia endophytica (Batters) De Toni 1924, Audouinella endophytica (Batters) P.S.Dixon 1976, (Cape Hangklip)
• Colaconema interpositum (Heydrich) H.Stegenga, J.J.Bolton & R.J.Anderson 1997, (Platbank, Cape Peninsula)
• Colaconema nemalionis (De Notaris ex L.Dufour) Stegenga 1985, (Hondeklip Bay to East London)
• Colaconema panduripodium H.Stegenga, J.J.Bolton & R.J.Anderson 1997, (Hondeklip Bay and Oudekraal, endemic)

Order Corallinales

Family Corallinaceae

• Amphiroa anceps (Lamarck) Decaisne 1842, syn. Bostrychia anceps (Lamarck) Decaisne, Corallina anceps Lamarck 1815, (Stilbaai eastwards into KwaZulu-Natal as far north as Mabibi)
• Amphiroa beauvoisii J.V.Lamouroux 1816, (Cape Hangklip to tropical east Africa)
• Amphiroa bowerbankii Harvey 1849, (Stilbaai eastward into KwaZulu-Natal up to Mabibi)
• Amphiroa capensis Areschoug 1852, (Llandudno on Cape Peninsula to Kowie River, endemic)
• Amphiroa ephedraea (Lamarck) Decaisne 1842, syn. Corallina ephedraea Lamarck 1815, (Cape Hangklip to KwaZulu-Natal and Mozambique)
• Arthrocardia carinata (Kützing) Johansen 1984, syn. Corallina carinata Kützing 1858, (South and east coasts)
• Arthrocardia corymbosa (Lamarck) Decaisne 1842, syn. Corallina corymbosa Lamarck 1815, Amphiroa corymbosa (Lamarck) Decaisne 1842, Cheilosporum corymbosum (Lamarck) Decaisne 1842, (Southern Cape Peninsula eastward)
• Arthrocardia flabellata (Kützing) Manza 1940, syn. Corallina flabellata Kützing 1858, (Probably along most of the southern African coast) (Probably along the entire South African coast extending into Mozambique)
• Arthrocardia filicula (Lamarck) Johansen 1984, syn. Corallina filicula Lamarck 1815, Cheilosporum palmatum var. filicula (Lamarck) Yendo 1902, (Namibia and west coast)
• Corallina officinalis Linnaeus 1758, (Oudekraal to Kowie river) (Oudekraal eastward to Mission Rocks)
• Jania cultrata (Harvey) J.H.Kim, Guiry & H.-G.Choi 2007, syn. Amphiroa cultrata Harvey 1849, Cheilosporum cultratum (Harvey) Areschoug 1852, (as Cheilosporum cultratum, Platboombaai on Cape Peninsula to Mozambique)
• Jania adhaerens J.V.Lamouroux 1816, syn. Corallina adhaerens (J.V.Lamouroux) Kützing 1858, (Cape Hangklip eastwards)
• Hydrolithon farinosum (J.V.Lamouroux) D.Penrose & Y.M.Chamberlain 1993, syn. Melobesia farinosa J.V.Lamouroux 1816, Fosliella farinosa (J.V.Lamouroux) M.A.Howe 1920, (Lala Neck, north of Sodwana Bay, KwaZulu-Natal)
• Hydrolithon onkodes (Heydrich) D.Penrose & Woelkerling 1992, syn. Lithothamnion onkodes Heydrich 1897, Goniolithon onkodes (Heydrich) Foslie 1898, Lithophyllum onkodes (Heydrich) Heydrich 1901, Porolithon onkodes (Heydrich) Foslie 1909, Spongites onkodes (Heydrich) Penrose & Woelkerling 1988, (Sodwana Bay in northern KwaZulu-Natal.)
• Hydrolithon pellire Y.M.Chamberlain & R.E.Norris 1994, (Port Alfred in Eastern Cape to Durban in KwaZulu-Natal).
• Hydrolithon samoënse (Foslie) Keats & Y.M.Chamberlain 1994, syn. Lithophyllum samoënse Foslie 1906, Pseudolithophyllum samoënse (Foslie) Adey 1970, (Yzerfontein, Western Cape to Sodwana Bay, KwaZulu-Natal.)
• Hydrolithon superficiale Keats & Y.M.Chamberlain 1994, (Sodwana Bay, KwaZulu-Natal.)
• Jania crassa J.V.Lamouroux 1821, (St. James in False Bay, Eastern Cape and KwaZulu-Natal)
• Jania intermedia (Kützing) P.C.Silva 1996, syn. Corallina intermedia Kützing 1858, (Palm Beach northward into Mozambique)
• Jania prolifera (J.V.Lamouroux) J.H.Kim, Guiry & H.-G.Choi 2007, syn. Corallina prolifera J.V.Lamouroux 1816, Cheilosporum proliferum (J.V.Lamouroux) Hariot 1902, Cheilosporum africanum Manza 1937, (as Cheilosporum proliferum/africanum, Stilbaai eastward extending into Mozambique)
• Jania rosea (Lamarck) Decaisne 1842, syn. Corallina rosea Lamarck 1815, Cornicularia rosea (Lamarck) V.J.Chapman & P.G.Parkinson 1974, Haliptilon roseum (Lamarck) Garbary & H.W.Johansen 1982, (as Haliptilon roseum, Sodwana Bay northwards)
• Jania sagittata (J.V.Lamouroux) Blainville 1834, syn. Corallina sagittata J.V.Lamouroux 1824, Amphiroa sagittata (J.V.Lamouroux) Decaisne 1842, Arthrocardia sagittata (J.V.Lamouroux) Decaisne 1842, Cheilosporum sagittatum (J.V.Lamouroux) Areschoug 1852, (as Cheilosporum sagittatum, Melkbosstrand to northern Mabibi in KwaZulu-Natal.)
• Jania verrucosa J.V.Lamouroux 1816, syn. Corallina verrucosa (Lamouroux) Kützing 1858, (False Bay eastward)
• Lithophyllum acrocamptum Heydrich 1902, syn. Lithophyllum incrustans f. incrassatum Foslie 1900, Lithophyllum incrassatum (Foslie) Foslie 1909, Lithothamnion incrassatum (Foslie) Jadin 1935, (Seaview (Port Elizabeth) to Umdloti (Durban))
• Lithophyllum corallinae (P.L.Crouan & H.M.Crouan) Heydrich 1897, syn. Melobesia corallinae P.L.Crouan & H.M.Crouan 1867, Dermatolithon corallinae (P.L.Crouan & H.M.Crouan) Foslie 1902, Lithophyllum pustulatum var. corallinae (P.L.Crouan & H.M.Crouan) Foslie 1905, Lithophyllum macrocarpum f. corallinae (P.L.Crouan & H.M.Crouan) Foslie 1909, Tenarea corallinae (P.L.Crouan & H.M.Crouan) Notoya 1974, Titanoderma corallinae (P.L.Crouan & H.M.Crouan) Woelkerling, Y.M.Chamberlain & P.C.Silva 1985, (Kommetjie (Western Cape) to KwaZulu-Natal)
• Lithophyllum incrustans R.A.Philippi 1837, syn. Lithothamnion incrustans (Philippi) Foslie 1895, Crodelia incrustans (Philippi) Heydrich 1911, (Coffee Bay (south of Port St. Johns))
• Lithophyllum neoatalayense Masaki 1968, (as Titanoderma neoatalayense, Groenriviermond (Northern Cape) to Cape Agulhas (Western Cape))
• Lithophyllum polycephalum Foslie, syn. Titanoderma polycephalum (Foslie) Woelkerling, Y.M.Chamberlain & P.C.Silva 1985, (as Titanoderma polycephalum, False Bay to Cape Agulhas (Western Cape))
• Lithophyllum pustulatum (J.V.Lamouroux) Foslie 1904, syn. Melobesia pustulata J.V.Lamouroux 1816, Titanoderma pustulatum (J.V.Lamouroux) Nägeli 1858, Dermatolithon pustulatum (J.V.Lamouroux) Foslie 1898, Epilithon pustulatum (J.V.Lamouroux) M.Lemoine 1921, Tenarea pustulata (J.V.Lamouroux) Shameel 1983, (as Titanoderma pustulatum, Occasional throughout the west coast and increasing in abundance toward KwaZulu-Natal where it is particularly abundant.)
• Metamastophora flabellata (Sonder) Setchell 1943, syn. Melobesia flabellata Sonder 1845, Mastophora flabellata (Sonder) Harvey 1849, (Palm Beach northwards into Mozambique)
• Neogoniolithon brassica-florida (Harvey) Setchell & L.R.Mason 1943, syn. Melobesia brassica-florida Harvey 1849, Lithothamnion brassica-florida (Harvey) Areschoug 1852, Goniolithon brassica-florida (Harvey) Foslie 1898, (Algoa Bay, Eastern Cape.)
• Pneophyllum amplexifrons (Harvey) Y.M.Chamberlain & R.E.Norris 1994, syn. Melobesia amplexifrons Harvey 1849, Lithophyllum amplexifrons (Harvey) Heydrich 1897, (Palm Beach, south of Port Shepstone, KwaZulu-Natal, northward into Mozambique.)
• Pneophyllum coronatum (Rosanoff) Penrose in Chamberlain 1994, syn. Melobesia coronata Rosanoff 1866, (Oudekraal, western Cape Peninsula, Western Cape.)
• Pneophyllum fragile Kützing 1843, (Widespread along the west coast.)
• Pneophyllum keatsii Y.M.Chamberlain 1994, (Oudekraal, western Cape Peninsula, Western Cape, to Cape Agulhas, Western Cape.)
• Spongites discoidea (Foslie) D.Penrose & Woelkerling 1988, syn. Lithophyllum discoideum Foslie 1900, Hydrolithon discoideum (Foslie) M.L.Mendoza & J.Cabioch 1985, (Port Nolloth, Northern Cape, to Cape Agulhas, Western Cape.)
• Spongites impar (Foslie) Y.M.Chamberlain 1994, syn. Lithophyllum impar Foslie 1909, (Cape St. Martin just south of St. Helena Bay, Western Cape, to Oudekraal, western Cape Peninsula, Western Cape.)
• Spongites yendoi (Foslie) Y.M.Chamberlain 1993, syn. Lithophyllum yendoi (Foslie) Foslie 1900, Goniolithon yendoi Foslie 1900, Lithothamnion yendoi (Foslie) Lemoine 1965, Pseudolithophyllum yendoi (Foslie) Adey 1970, (Throughout South Africa (Namibia to the Mozambican border). Most abundant along the southern west and south coasts, becoming less common toward the east.)

Order Gelidiales

Family Gelidiaceae

• Gelidium abbottiorum R.E.Norris 1990, (Brandfontein to northern KwaZulu-Natal), (Cape Hangklip to Kosi Bay)
• Gelidium applanatum Stegenga, Bolton & R.J.Anderson 1997, (Vulcan Rock off Hout Bay and Muizenberg)
• Gelidium capense (S.G.Gmelin) P.C.Silva in P.C.Silva, E.G.Meñez, & Moe 1987, (Melkbosstrand to Kenton on Sea Eastern Cape. Endemic?)
• Gelidium foliaceum (Okamura) E.M.Tronchin 2002, syn. Gelidium pusillum f. foliaceum Okamura 1934, Onikusa foliacea (Okamura) R.E.Norris 1992,(Between Kei Mouth and Sodwana Bay)
• Gelidium micropterum Kützing 1868, (Cape Peninsula to Knysna)
• Gelidium pristoides (Turner) Kützing 1843, (Sea Point and False Bay eastwards)
• Gelidium pteridifolium R.E.Norris, Hommersand & Fredericq 1987, (Glencairn, Cape Hangklip, Eastern Cape and southern KwaZulu-Natal up to Tinley Manor just north of Durban)
• Gelidium reptans (Suhr) Kylin 1938, syn. Phyllophora reptans Suhr 1841, (Cape Peninsula and False Bay to KwaZulu-Natal and Mozambique)
• Gelidium vittatum (Linnaeus) Kützing 1843, syn. Fucus vittatus Linnaeus 1767, Suhria vittata (Linnaeus) Endlicher 1843, Chaetangium vittatum (Linnaeus) P.G.Parkinson 1981, (Möwe Bay, Nabibia to Brandfontein, drift specimens to Port Elizabeth)
• Ptilophora coppejansii E.M.Tronchin & O.De Clerck 2004, (Protea Banks, endemic)
• Ptilophora diversifolia (Suhr) Papenfuss 1940, syn. Phyllophora diversifolia Suhr 1840, Membranifolia diversifolia (Suhr) Kuntze 1891, (Port Elizabeth to just south of Durban, endemic)
• Ptilophora helenae (Dickinson) R.E.Norris 1987, basionym. Gelidium helenae Dickinson 1950, (Mission Rocks, drift between Mission Rocks and Richards Bay)
• Ptilophora hildebrandtii (Hauck) R.E.Norris 1990, basionym Thysanocladia hildebrandtii Hauck 1886, (Sodwana Bay northwards)
• Ptilophora leliaertii E.M.Tronchin & O.De Clerck 2004, (Protea Banks and drift on nearby beaches)
• Ptilophora pinnatifida J.Agardh 1885, syn. Beckerella pinnatifida (J.Agardh) Kylin 1956, (Just south of Durban in KwaZulu-Natal to Algoa Bay in Eastern Cape)

Family Gelidiellaceae

• Gelidiella acerosa (Forsskål) Feldmann & G.Hamel 1934, syn. Fucus acerosus Forsskål 1775, Echinocaulon acerosus (Forsskål) Børgesen 1932, (Just south of Sodwana Bay into Mozambique)

Family Pterocladiaceae

• Pterocladiella caerulescens (Kützing) Santelices & Hommersand 1997, syn. Gelidium caerulescens Kützing 1868, Pterocladia caerulescens (Kützing) Santelices 1976, (Sodwana Bay from 2-mile reef to 7-mile reef)

Order Gigartinales

Family Caulacanthaceae

• Caulacanthus ustulatus (Mertens ex Turner) Kützing 1843, syn. Fucus acicularis var. ustulatus Mertens ex Turner 1808, Sphaerococcus ustulatus (Mertens ex Turner) C.Agardh 1828, Gigartina ustulata (Mertens ex Turner) Greville 1830, Hypnea ustulata (Mertens ex Turner) Montagne 1840, Gelidium ustulatum (Mertens ex Turner) J.Agardh 1842, Olivia ustulata (Mertens ex Turner) Montagne 1846, (Whole South African coast)
• Heringia mirabilis (C.Agardh) J.Agardh 1846, syn. Sphaerococcus mirabilis C.Agardh 1820, (Namibia to East london, Southern African endemic)

Family Cystocloniaceae

• Hypnea ecklonii Suhr 1836, (Pearly Beach to Namibia, Southern African endemic)
• Hypnea musciformis (Wulfen) J.V.Lamouroux 1813, syn. Fucus musciformis Wulfen in Jacquin 1789, Ceramium musciforme (Wulfen) Ruchinger 1818, Sphaerococcus musciformis (Wulfen) C.Agardh 1822, Hypnophycus musciformis (Wulfen) Kützing 1843, (Brandfontein, also south and east coast)
• Hypnea rosea Papenfuss 1947, (Strand in False Bay and Die Walle, just west of Cape Agulhas, and south and east coasts, endemic)
• Hypnea spicifera (Suhr) Harvey in J. Agardh 1847, syn. Gracilaria spicifera Suhr 1834, Hypnophycus spicifera (Suhr) Kützing 1843, (virtually the entire South African coast, Southern African endemic)
• Hypnea tenuis Kylin 1938, (Mainly south and east coast, as far west as Swartklip in False Bay)
• Hypnea viridis Papenfuss 1947, (Isipingo northwards into southern Mozambique, Southern African endemic)
• Rhodophyllis reptans (Suhr) Papenfuss 1956, syn. Halymenia reptans Suhr 1834, Euhymenia reptans (Suhr) Kützing 1849, Kallymenia reptans (Suhr) E.S.Barton 1893, (Hondeklipbaai to KwaZulu-Natal, Southern African endemic)

Family Dumontiaceae

• Gibsmithia hawaiiensis Doty 1963, (Known from only a few locations in northern KwaZulu-Natal)

Family Gigartinaceae

• Chondracanthus teedei (Mertens ex Roth) Kützing 1843, syn. Ceramium teedei Mertens ex Roth 1806, Gigartina teedei (Mertens ex Roth) J.V.Lamouroux 1813, (Kraalbaai in Langebaan Lagoon, and Eastern Cape)
• Gigartina bracteata (S.G.Gmelin) Setchell & N.L.Gardner 1933, syn. Fucus bracteatus S.G.Gmelin 1768, (Namibia to Cape of Good Hope, drift material from Muizenberg, Southern African endemic)
• Gigartina insignis (Endlicher & Diesing) F.Schmitz in E.S.Barton 1896, syn. Iridaea insignis Endlicher & Diesing 1845, (Muizenberg, Cape Hangklip to Kowie River, Southern African endemic)
• Gigartina pistillata (S.G.Gmelin) Stackhouse 1809, syn. Fucus pistillatus S.G.Gmelin 1768, (Smitswinkel Bay and Swartklip east to the Kowie area)
• Gigartina tysonii Reinbold in Tyson 1912, (Three Anchor Bay to Camps Bay, drift specimens from Platboombaai and Olifantsbos, endemic)
• Iridaea convoluta (Areschoug ex J Agardh) Hewitt 1960, syn. Gigartina convoluta Areschoug ex J.Agardh 1899, (Table Bay to Cape of Good Hope, endemic)
• Mazzaella capensis (J.Agardh) Fredericq in Hommersand et al. 1993, Iridaea capensis J.Agardh 1848, Iridophycus capensis (J.Agardh) Setchell & N.L.Gardner 1936, Gigartina capensis (J.Agardh) D.H.Kim 1976, (Port Nolloth to Cape Agulhas, extending into Namibia, Southern African endemic)
• Rhodoglossum alcicorne Stegenga, Bolton & R.J.Anderson 1997, (Hout Bay, endemic)
• Sarcothalia radula (Esper) Edyvane & Womersley 1994, syn. Fucus radula Esper 1802, Sphaerococcus radula (Esper) C.Agardh 1822, Iridaea radula (Esper) Bory de Saint-Vincent 1828, Gigartina radula (Esper) J.Agardh 1851, (Port Nolloth to Cape Agulhas, rare at De Hoop, extending into Namibia)
• Sarcothalia scutellata (Hering) Leister 1993, syn. Sphaerococcus scutellatus Hering 1841, Dicurella scutellata (Hering) Papenfuss 1940, Gigartina scutellata (Hering) Simons 1983, (Namibia to Cape Hangklip)
• Sarcothalia stiriata (Turner) Leister in Hommersand, Guiry, Fredericq & Leister 1993, syn. Fucus stiriata Turner 1807, Sphaerococcus stiriatus (Turner) C.Agardh 1817, Sphaerococcus radula var. stiriatus (Turner) Rudolphi 1831, Mastocarpus stiriatus (Turner) Kützing 1843, Gigartina stiriata (Turner) J.Agardh 1851, (Namibia and Port Nolloth to Cape Agulhas)

Family Kallymeniaceae

• Kallymenia agardhii R.E.Norris 1964, (Namibia to Cape Agulhas, Southern African endemic)
• Kallymenia schizophylla J.Agardh 1848, (Namibia to southern Cape Peninsula and Cape Hangklip. Southern African endemic)
• Pugetia harveyana (J.Agardh) R.E.Norris 1964, syn. Kallymenia harveyana J.Agardh 1844, (Namibia to southern Cape Peninsula, Drift material from Muizenberg)
• Thamnophyllis discigera (J.Agardh) R.E.Norris 1964, syn. Rhodymenia discigera J.Agardh 1841, Callophyllis discigera (J.Agardh) J.Agardh 1847, (Port Nolloth to Cape Agulhas)
• Thamnophyllis pocockiae R.E.Norris 1964, (St Helena bay to East London)

Family Phacelocarpaceae

• Phacelocarpus oligacanthus Kützing 1868, syn. Phacelocarpus tortuosus var. oligacanthus (Kützing) De Toni 1900, (Cape Agulhas to Widenham near Umkomaas, endemic)
• Phacelocarpus tortuosus Endlicher & Diesing 1845, (KwaZulu-Natal, unspecified range)
• Phacelocarpus tristichus J.Agardh 1885, (Sodwana Bay northward)

Family Phyllophoraceae

• Ahnfeltiopsis complicata (Kützing) P.C.Silva & DeCew 1992, syn. Chondrus complicatus Kützing 1849, Gymnogongrus complicatus (Kützing) Papenfuss 1943, (Namibia to False Bay, Southern African endemic)
• Ahnfeltiopsis glomerata (J.Agardh) P.C.Silva & DeCew 1992, syn. Gymnogongrus glomeratus J.Agardh 1849, (Namibia to Cape Agulhas, Southern African endemic)
• Ahnfeltiopsis intermedia (Kylin) Stegenga, Bolton & R.J.Anderson 1997, syn. Gymnogongrus intermedius Kylin 1938, (Kalk Bay, Sea Point and possibly Keurboomstrand in Plettenberg Bay)
• Ahnfeltiopsis polyclada (Kützing) P.C.Silva & DeCew 1992, syn. Chondrus polycladus Kützing 1849, Gymnogongrus polycladus (Kützing) J.Agardh 1851, (False Bay to Brandfontein, possibly Melkbosstrand and Postberg)
• Ahnfeltiopsis vermicularis (C.Agardh) P.C.Silva & DeCew 1992, syn. Sphaerococcus vermicularis C.Agardh 1817, Gymnogongrus vermicularis (C.Agardh) J.Agardh 1851, (Hondeklipbaai to False Bay, South African endemic)
• Gymnogongrus dilatatus (Turner) J.Agardh 1851, syn. Fucus dilatatus Turner 1811, Sphaerococcus dilatatus (Turner) C.Agardh 1817, Pachycarpus dilatatus (Turner) Kützing 1843, (Namibia to southern Cape Peninsula, drift material from Muizenberg)
• Gymnogongrus tetrasporifer Papenfuss in R.A.Anderson & Bolton 1990, (Port Alfred eastwards extending into KwaZulu-Natal as far north as Bhanga Nek, endemic)
• Schottera nicaeensis (J.V.Lamouroux ex Duby) Guiry & Hollenberg 1975, syn. Halymenia nicaeensis J.V.Lamouroux ex Duby 1830, Rhodymenia palmetta var. nicaeënsis (Lamouroux ex Duby) J.Agardh 1842, Rhodymenia nicaeensis (J.V.Lamouroux ex Duby) Montagne 1846, Gymnogongrus nicaeënsis (J.V.Lamouroux ex Duby) Ardissone & Straforello 1877, Phyllophora nicaeënsis (J.V.Lamouroux ex Duby) F.Schmitz 1893, Petroglossum nicaeensis (Duby) Schotter 1953, (Known from several localities in southern KwaZulu-Natal)

Family Rhizophyllidaceae

• Portieria hornemannii (Lyngbye) P.C.Silva in P.C. Silva, Meñez & Moe 1987, syn. Desmia hornemannii Lyngbye 1819, Chondrococcus hornemannii (Lyngbye) F.Schmitz 1895, (Table Bay, False Bay, south and east coast, extending into Mozambique)
• Portieria tripinnata (Hering) De Clerck in De Clerck, Tronchin & Schils 2005, syn. Rhodymenia tripinnata Hering in Krauss 1846, (Haga Haga near Kei Mouth to Mission Rocks)

Family Solieriaceae

• Meristotheca papulosa (Montagne) J.Agardh 1872, syn. Kallymenia papulosa Montagne 1850, Eucheuma papulosa (Montagne) A.D.Cotton & Yendo 1914, (Protea Banks to Mabibi)

Order Gracilariales

Family Gracilariaceae

• Gracilaria aculeata (Hering) Papenfuss 1967, syn. Gelidium aculeatum Hering 1846, (Kenton near Port Alfred eastward into KwZulu-Natal as far as Cape Vidal)
• Gracilaria canaliculata Sonder 1871, (Cape Vidal northwards into Mozambique)
• Gracilaria corticata (J.Agardh) J.Agardh 1852: (1851-1863), syn. Rhodymenia corticata J.Agardh 1841, Sphaerococcus corticatus (J.Agardh) Kützing 1849, (Port Edward northwards into Mozambique)
• Gracilaria denticulata F.Schmitz ex Mazza 1907, syn. Tylotus denticulatus (F.Schmitz ex Mazza) Papenfuss, (Kenton near Port Alfred eastward into Mozanbique)
• Gracilaria salicornia (C.Agardh) E.Y.Dawson 1954, syn. Sphaerococcus salicornia C.Agardh 1820, Corallopsis salicornia (C.Agardh) Greville 1830, (Cape Vidal northwards)
• Gracilaria verrucosa (Hudson) Papenfuss 1950, syn. Fucus verrucosus Hudson 1762, (recorded from: St Helena Bay, Velddrif, Saldanha Bay, Langebaan Lagoon, Table Bay, False bay, Swartkops River)
• Gracilaria vieillardii P.C.Silva in Silva, Meñez & Moe 1987, (Most of KwaZulu-Natal coast)
• Gracilariopsis lemaneiformis(Bory de Saint-Vincent) E.Y.Dawson, Acleto & Foldvik 1964, syn. Gigartina lemaneiformis Bory de Saint-Vincent 1828, Gracilaria lemaneiformis (Bory de Saint-Vincent) Greville 1830, Cordylecladia lemanaeformis (Bory de Saint-Vincent) M.A.Howe 1914, (Simon’s Town in False Bay)

Family Pterocladiophilaceae

• Gelidiocolax suhriae (M.T.Martin & M.A.Pocock) K.-C.Fan & Papenfuss 1959, syn. Choreocolax suhriae M.T.Martin & M.A.Pocock 1953, (Blaauwberg to Strandfontein, endemic)

Order Halymeniales

Family Halymeniaceae

• Carpopeltis maillardii (Montagne & Millardet) Chiang 1970. syn. Phyllophora maillardii Montagne & Millardet 1862, (Durban northwards extending into Mozambique)
• Carpopeltis phyllophora (J.D.Hooker & Harvey) F.Schmitz in Schmitz & Hauptfleish 1897, syn. Acropeltis phyllophora J.D.Hooker & Harvey 1847, Cryptonemia phyllophora (J.D.Hooker & Harvey) J.Agardh 1872, (Palm Beach northward)
• Codiophyllum natalense J.E.Gray 1872, (Probably from Port Alfred to Protea Bamks in southern KwaZulu-Natal)
• Cryptonemia natalensis (J.Agardh) Chiang 1970, syn. Meristotheca natalensis J.Agardh 1876, (Kenton on Sea eastwards extending into KwaZulu-Natal as far as Durban, endemic)
• Grateloupia doryphora (Montagne) M.A.Howe 1914, syn. Halymenia doryphora Montagne 1839, (Port Nolloth to Cape Agulhas)
• Grateloupia filicina (J.V.Lamouroux) C.Agardh 1822, syn. Delesseria filicina J.V.Lamouroux 1813, (Whole west coast and south coast to Eastern Cape as far as the Kowie area)
• Halymenia durvillei Bory de Saint-Vincent 1828, (Sodwana Bay northwards into Mozambique)
• Pachymenia orbitosa (Suhr) L.K.Russell in L.K. Russell et al. 2009′ syn. Iridaea orbitosa Suhr 1840, Aeodes orbitosa (Suhr) F.Schmitz 1894, (Whole Cape west coast, extending into Namibia, and eastward at least as far as Cape Agulhas, endemic)
• Pachymenia carnosa (J.Agardh) J.Agardh 1876, syn. Platymenia carnosa J.Agardh 1848. Iridaea carnosa (J.Agardh) Kützing 1849, Schizymenia carnosa (J.Agardh) J.Agardh 1851, (Whole west coast into Namibia, eastward to Brandtfontein)
• Pachymenia cornea (Kützing) Chiang 1970, syn. Iridaea cornea Kützing 1867, Cyrtymenia cornea (Kützing) F.Schmitz 1897, Phyllymenia cornea (Kützing) Setchell & Gardner 1936, (Doring Bay to East London)
• Polyopes constrictus (Turner) J.Agardh 1851, syn. Fucus constrictus Turner 1809, Sphaerococcus constrictus (Turner) C.Agardh 1822, Gelidium constrictum (Turner) Kützing 1849, (Doring Bay to Kei River mouth)
• Prionitis filiformis Kylin 1941, (Port Elizabeth to Port Edward, endemic)
• Prionitis nodifera (Hering) E.S.Barton 1896, syn. Sphaerococcus nodifer Hering 1841, Gigartina nodifera (Hering) Hering 1846, Mammillaria nodifera (Hering) Kuntze 1891, Zanardinula nodifera (Hering) De Toni fil. 1936, (Three Sisters at Riet River, 10 km west of Port Alfred to Mission Rocks, endemic)
• Thamnoclonium dichotomum (J.Agardh) J.Agardh 1876, syn. Polyphacum dichotomum J.Agardh 1841, Thamnoclonium hirsutum var. africanum Kützing 1849, Thamnoclonium claviferum J.Agardh 1876, Thamnoclonium codioides J.Agardh 1876, (Predominantly restricted to southern KwaZulu-Natal, but extending into northern KwZulu-Natal as far as Sodwana Bay)

Family Tsengiaceae

• Tsengia lanceolata (J.Agardh) Saunders & Kraft 2002, syn. Nemastoma lanceolatum J.Agardh 1847, (Hondeklipbaai to Cape Hangklip)
• Tsengia pulchra (Baardseth) Masuda & Guiry 1994, syn. Nemastoma pulchrum Baardseth 1941, (found only once at the Cape of Good Hope)

Order Hildenbrandiales

Family Hildenbrandiaceae

• Hildenbrandia lecannellieri Hariot 1887, (Entire west coast and east coast as far as Port Elizabeth)
• Hildenbrandia rubra (Sommerfelt) Meneghini 1841, (Probably the whole of the west coast)

Order Nemaliales

Family Galaxauraceae

• Dichotomaria diesingiana (Zanardini) Huisman, J.T.Harper & G.W.Saunders 2004, syn. Galaxaura diesingiana Zanardini 1846, (Arniston eastward to Mission Rocks and Cape Vidal)
• Dichotomaria obtusata (J.Ellis & Solander) Lamarck 1816, syn. Corallina obtusata J.Ellis & Solander 1786, Galaxaura obtusata (J.Ellis & Solander) J.V.Lamouroux 1816, (as Galaxaura obtusata, Protea Banks northward)
• Dichotomaria tenera (Kjellman) Huisman, J.T.Harper & G.W.Saunders 2004, syn. Galaxaura tenera Kjellman 1900, (Isipingo northwards)
• Galaxaura rugosa (J.Ellis & Solander) J.V.Lamouroux 1816, syn. Corallina rugosa J.Ellis & Solander 1786, (Sodwana northward)
• Tricleocarpa cylindrica (J.Ellis & Solander) Huisman & Borowitzka 1990, syn. Corallina cylindrica J.Ellis & Solander 1786, Galaxaura cylindrica (J.Ellis & Solander) J.V.Lamouroux 1821, Halysium cylindricum (J.Ellis & Solander) Kützing 1843, (Jesser Point at Sodwana northwards)

Family Liagoraceae

• Helminthocladia papenfussii Kylin 1938, (Oudekraal eastward at least as far as Cape Morgan)
• Helminthora furcellata (Reinbold ex Tyson) M.T.Martin 1947, (Endemic, Three Anchor Bay to Cape Hangklip)
• Liagora ceranoides J.V.Lamouroux 1816, syn/ Liagora viscida f. ceranoides (J.V.Lamouroux) Hauck 1882, (Sodwana Bay)
• Neoizziella divaricata (C.K.Tseng) S.M.Lin, S.-Y.Yang & Huisman 2011, syn. Liagora divaricata C.K.Tseng 1941, (as Liagora divaricata, Sodwana Bay)

Family Scinaiaceae

• Nothogenia erinacea (Turner) P.G.Parkinson 1983, (Cape Fria, Namibia to East London)
• Nothogenia ovalis (Suhr) P.G.Parkinson 1983, syn. Dumontia ovalis Suhr 1840, (Endemic, Möwe Bay, Namibia to Cape Agulhas)
• Scinaia capensis (Setchell) Huisman 1985, syn. Gloiophloea capensis Setchell 1914, (Endemic, Melkbosstrand to Kowie area of Eastern Cape)
• Scinaia salicornioides (Kützing) J.Agardh 1851, syn. Ginnania salicornioides Kützing, (Endemic, Muizenberg to east coast)

Order Nemastomatales

Family Nemastomataceae

• Predaea feldmannii Børgesen 1950, (Known only from Sodwana Bay)

Family Schizymeniaceae

• Haematocelis sp. vel aff. (Melkbosstrand)
• Platoma cyclocolpum (Montagne) F.Schmitz 1894, Halymenia cyclocolpa Montagne 1841, (Only collected once at Wright Canyon in Sodwana Bay)
• Schizymenia apoda (J.Agardh) J.Agardh 1851, syn. Platymenia apoda J.Agardh 1848, Platymenia undulata var. obovata J.Agardh 1848, Schizymenia obovata (J.Agardh) J.Agardh 1851, (Port Nolloth to Cape Agulhas)

Order Palmariales

Family Meiodiscaceae

• Meiodiscus concrescens (K.M.Drew) P.W.Gabrielson in Gabrielsen et al. 2000, syn. Audouinella concrescens (K.M.Drew) P.S.Dixon 1976, Rhodochorton concrescens, K.M. Drew 1928, (Hout Bay)

Family Rhodophysemataceae

• Rhodophysema feldmannii Cabioch 1975, (Hout Bay to Platbank on Cape Peninsula)

Family Rhodothamniellaceae

• Rhodothamniella floridula (Dillwyn) Feldmann in T.Christensen 1978, (Lambert’s Bay to Hluleka, Transkei)

Order Peyssonneliales

Family Peyssonneliaceae

• Peyssonnelia atropurpurea P.L.Crouan & H.M.Crouan 1867, (Yzerfontein to Brandfontein)
• Sonderophycus capensis (Montagne) M.J.Wynne 2011, Peyssonnelia capensis Montagne 1847, Pterigospermum capense (Montagne) Kuntze 1891, Sonderopelta capensis (Montagne) A.D.Krayesky 2009, (as Peyssonnelia capensis, Hout Bay on Cape Peninsula eastwards extending into Mozambique)
• Peyssonnelia replicata Kützing 1847, syn. Pterigospermum replicatum (Kützing) Kuntze 1891, (Palm Beach to St Lucia, endemic)

Order Plocamiales

Family Plocamiaceae

• Plocamiocolax papenfussianus M.F.Martin & M.A.Pocock 1953, (Melkbosstrand to East London, endemic) (Arniston north to Rabbit Rock in KwaZulu-Natal)
• Plocamium beckeri F.Schmitz ex Simons 1964, (Collected at Muizenberg, Eastern Cape and KwaZulu-Natal)
• Coral plocamium Plocamium corallorhiza (Turner) J.D.Hooker & Harvey 1845, syn. Fucus corallorhiza Turner 1808, Thamnophora corallorhiza (Turner) C.Agardh 1822, (Yzerfontein to KwaZulu-Natal extending into southern Mozambique)
• Plocamium cornutum (Turner) Harvey 1849, syn. Fucus cornutus Turner 1819, Thamnophora cornuta (Turner) Greville 1830, Thamnocarpus cornutus (Turner) Kützing 1843, (entire coastline of the Western Cape to Namibia, rarer in the Eastern Cape, Southern African endemic)
• Plocamium glomeratum J.Agardh 1851, (Namibia to Still Bay, Southern African endemic)
• Plocamium maxillosum (Poiret) J.V.Lamouroux 1813, syn. Fucus maxillosus Poiret 1808, (Hondeklipbaai to Cape Agulhas, endemic)
• Plocamium rigidum Bory de Saint-Vincent in Bélanger & Bory de Saint-Vincent 1834, syn. Nereidea rigida (Bory de Saint-Vincent) Kuntze 1891, (Namibia to Eastern Cape, Southern African endemic)
• Plocamium suhrii Kützing 1849, (False Bay eastward) (Stilbaai eastwards into KwaZulu-Natal as far north as Mission Rocks)
• Plocamium telfairiae (W.J.Hooker & Harvey) Harvey ex Kützing 1849, syn. Thamnophora telfairiae W.J.Hooker & Harvey 1834, Bonnemaisonia telfairiae (W.J.Hooker & Harvey) Endlicher 1843, Nereidea telfairiae (W.J.Hooker & Harvey) Kuntze 1891, (Cape Vidal northwards extending into southern Mozambique)
• Plocamium sp. indet. (False Bay coast, endemic?)

Family Sarcodiaceae

• Sarcodia dentata (Suhr) R.E.Norris 1987, syn. Halymenia dentata Suhr 1834, Kallymenia dentata (Suhr) J.Agardh 1848, Halymenia carnosa var. dentata (Suhr) Kützing 1849, Anatheca dentata (Suhr) Papenfuss 1940, (Swartklip, Die Walle just west of Cape Agulhas, Eastern Cape and KwaZulu-Natal, Southern African endemic)
• Trematocarpus flabellatus (J.Agardh) De Toni 1900, syn. Phyllotylus flabellatus J.Agardh 1847, Dicurella flabellata (J.Agardh) J.Agardh 1852, (Lüderitz to Port Elizabeth, Southern African endemic)
• Trematocarpus fragilis (C.Agardh) De Toni 1900, syn. Sphaerococcus fragilis C.Agardh 1822, Chondrus fragilis (C.Agardh) Greville 1830, Dicurella fragilis (C.Agardh) J.Agardh 1852, (Port Nolloth to Brandfontein, Southern African endemic)

Order Rhodymeniales

Family Champiaceae

• Champia compressa Harvey 1838, (False Bay eastward to northern KwaZulu-Natal and extending into Mozambique. Rarer on west side of Cape Peninsula and also found at Kraalbaai and Paternoster)
• Champia indica Børgesen 1933, (Known only from Sodwana Bay)
• Chylocladia capensis Harvey 1849, (Namibia to Transkei, Southern African endemic)

Family Faucheaceae

• Gloiocladia spinulosa (Okamura & Segawa) Sánchez & Rodríguez-Prieto in Rodriguez-Prieto et al. 2007, syn. Fauchea spinulosa Okamura & Segawa 1935, (as Fauchea spinulosa, Protea Banks, drift near Cape Vidal)

Family Hymenocladiaceae

• Erythrymenia obovata F.Schmitz ex Mazza 1921, (Port Alfred eastward to Shelly Beach in southern KwaZulu-Natal, endemic)

Family Lomentariaceae

• Ceratodictyon repens (Kützing) R.E.Norris 1987, syn. Gelidium repens Kützing 1868, Gelidiopsis repens (Kützing) Weber-van Bosse 1928, (as Gelidiopsis repens, Sodwana Bay northwards)
• Lomentaria diffusa Stegenga, Bolton & R.J.Anderson 1997, (Saldanha Bay and Kraalbaai to Brandfontein, endemic)

Family Rhodymeniaceae

• Botryocladia paucivesicaria Stegenga, Bolton & R.J.Anderson 1997, (Known from drift specimens collected on the west side of Cape peninsula at Noordhoek Beach and Olifantsbos, endemic)
• Botryocladia leptopoda (J.Agardh) Kylin 1931, syn. Chrysymenia uvaria var. leptopoda J.Agardh 1876, Chrysymenia leptopoda (J.Agardh) Weber-van Bosse 1928, (Collected once at 5 Mile Reef, Sodwana Bay, also from drift near Lala Nek)
• Botryocladia madagascariensis G.Feldmann 1945, (Bird Island in Algoa Bay eastwards into KwaZulu-Natal as far as Isipingo)
• Halichrysis irregularis (Kützing) A.J.K.Millar 2005, syn. Iridaea irregularis Kützing 1867, Herpophyllon coalescens Farlow 1902, Halichrysis coalescens (Farlow) R.E.Norris & A.J.K.Millar 1991, (as Halichrysis coalescens, Trafalgar northwards into Mozambique)
• Rhodymenia capensis J.Agardh 1894, syn. Epymenia capensis (J.Agardh) Papenfuss 1940,
• Rhodymenia holmesii Ardissone 1893, (drift material from Olifantsbos) (Southern half of the Cape Peninsula, endemic)
• Rhodymenia natalensis Kylin 1938, (From Namibia along the whole of the South African coast extending into southern Mozambique)
• Rhodymenia obtusa (Greville) Womersley 1996, syn. Phyllophora obtusa Greville 1831, Epymenia obtusa (Greville) Kützing 1849, (Muizenberg and the southern Cape Peninsula to Namibia)
• Rhodymenia pseudopalmata (J.V.Lamouroux) P.C.Silva 1952, syn. Fucus pseudopalmatus J.V.Lamouroux 1805, Delesseria pseudopalmata (J.V.Lamouroux) J.V.Lamouroux 1813, (From drift at Strandfontein)

Class Rhodophyta incertae sedis

Order Rhodophycophyta incertae sedis

Family Rhodophycophyta incertae sedis

• Callophycus condominius R.E.Norris 1987, (Rocky Bay northwards, probably extending into southern Mozambique)
• Callophycus densus (Sonder) Kraft 1984, syn. Thysanocladia densa Sonder 1871, (Olifantsbos to southern KwaZulu-Natal)
• Callophycus tridentifer Kraft 1984, (Port Edward to Scottsburgh)

Class: Stylonematophyceae

Order: Stylonematales

Family Stylonemataceae

• Stylonema alsidii (Zanardini, 1840) K.M.Drew 1956, (Saldanha Bay southward, and south coast of Western Cape, Eastern Cape to Kwa-Zulu Natal)
• Neevea cf repens Batters 1900, (Hout Bay)

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