| Name | Author | Source | Citation | Year |
|---|
| Chantransia immersa f. polysiphoniae | Rosenvinge | image |
| Choreocolax polysiphoniae | Reinsch | Contrib. Alg. et Fung.: | 61, Rhodophyceae pl. XLIX | 1875 |
| Ectocarpus polysiphoniae | Noda | image |
| Endogenes polysiphoniae | P. Dangeard | image |
| Entocladia polysiphoniae | Anand | image |
| Entocladia polysiphoniae | P. Anand | Marine algae from Karachi. Part I. Chlorophyceae: | 31, text-fig. 15B | 1940 |
| Entocladia polysiphoniae | Setchell & Gardner | image |
| Entocladia polysiphoniae | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci. IV, | 12(29): 718, pl. 13: fig. 18 | 1924 |
| Leibleinia polysiphoniae | (Frémy) Compère | Bull. Jard. Bot. Natl. Belgique | 55: 488 | 1985 |
| Leibleinia polysiphoniae | (Fremy) Compere | image |
| Leptolyngbya polysiphoniae | (Frémy) K. Anagnostidis | Preslia | 73: 367 | 2001 |
| Levringiella polysiphoniae | E.C. Oliveira & Ugadim | Bol. Bot. [Dept. Bot. Univ. Sa\*~o Paulo] | 1: 95, figs. 1-5 | 1973 |
| Levringiella polysiphoniae | Oliveira & Ugadim | image |
| Lyngbya polysiphoniae | Frémy | Arch. Bot. Mém. | 3{2}: 194, fig. 161 | 1930 |
| Lyngbya polysiphoniae | Fremy | image |
| Meridiocolax polysiphoniae | (E.C. Oliveira & Ugadim) J. Morrill | Proc. Acad. Nat. Sci. Philadelphia | 127: 233 | 1976 |
| Mikrosyphar polysiphoniae | E.H.P. Kuckuck | image |
| Onychocolax polysiphoniae | Pocock | Proceedings of the Linnean Society of London | 167: 32, figs. 5, 6, pls. 5, 6 | 1956 |
| POLYSIPHONIA | Ardissone | image |
| POLYSIPHONIA | Greville | image |
| POLYSIPHONIA | Harvey | image |
| POLYSIPHONIA | J. Agardh | image |
| POLYSIPHONIA | | image |
| POLYSIPHONIA | | image |
| POLYSIPHONIA | | image |
| POLYSIPHONIA | | image |
| POLYSIPHONIA | | image |
| POLYSIPHONIA | | image |
| POLYSIPHONIA | | image |
| Polysiphonia abscissa f. microcarpa | (J. Hooker & Harvey) Dickie | image |
| Polysiphonia abscissa | Hook. f. & Harvey | image |
| Polysiphonia abscissa | J. Hooker & Harvey | London J. Bot. | 4: 266 | 1845 |
| Polysiphonia abscissoides | Womersley | Austral. J. Bot. | 27: 492, figs. 9E-H | 1979 |
| Polysiphonia acanthina | J. Agardh | image |
| Polysiphonia acanthocarpa | Kützing | image |
| Polysiphonia acanthophora | Harvey | image |
| Polysiphonia acanthophora | Kützing | image |
| Polysiphonia acanthophora var. minor | Schiffner | image |
| Polysiphonia acanthotricha | Kützing | image |
| Polysiphonia acroblasta | Kützing | image |
| Polysiphonia acrolepta | Zanardini ex A. De Toni | image |
| Polysiphonia aculeata | (Agardh) Montagne | image |
| Polysiphonia aculeata | Kützing | image |
| Polysiphonia aculeifera | Kützing | image |
| Polysiphonia aculeifera | Zanardini | image |
| Polysiphonia acuminata | Gardner | image |
| Polysiphonia acuminata | N.L. Gardner | Univ. Calif. Publ. Bot. | 14: 100 | 1927 |
| Polysiphonia adriatica | Schiffner | image |
| Polysiphonia adscendens | (Bonnemaison) Crouan frat. | image |
| Polysiphonia adscendens | Meneghini | image |
| Polysiphonia adunca | Kützing | image |
| Polysiphonia affinis | D. Moore | image |
| Polysiphonia agardhiana | Greville | image |
| Polysiphonia aggregata | Segi | image |
| Polysiphonia akkeshiensis | Segi | J. Fac. Fish. Pref. Univ. Mie | 1: 232, pl. 9: 1-3; text-figs. 23, 24 | 1951 |
| Polysiphonia allochroa | (Roth) Duby | image |
| Polysiphonia allochroa | (Roth) Kützing | image |
| Polysiphonia allochroa | (Roth) Wallroth | image |
| Polysiphonia allochroa var. penicillata | Rabenhorst | image |
| Polysiphonia allochrous_('allochroa') | (Roth) Duby | Bot. Gall.: | 966 | 1830 |
| Polysiphonia amentacea | (C. Agardh) Montagne | image |
| Polysiphonia americana | Reinsch | image |
| Polysiphonia amethystea f. crispa | Suringar | image |
| Polysiphonia amethystea | Kützing | image |
| Polysiphonia amoena | Sonder | image |
| Polysiphonia amoena | Sonder herb. | image |
| Polysiphonia amphibia | Harvey | image |
| Polysiphonia amphibolis | Womersley | Austral. J. Bot. | 27: 474, figs. 3F,G, 4A-C | 1979 |
| Polysiphonia amplacapilli | B. Kim & M.S. Kim | Algae | 29: 185, fig. 2 | 2014 |
| Polysiphonia angustissima | Kützing | Tab. Phycol. | 14: 17, pl. 47: figs. d-g | 1864 |
| Polysiphonia angustissima | Kützing | image |
| Polysiphonia anisogona | J. Hooker & Harvey | London J. Bot. | 4: 265 | 1845 |
| Polysiphonia anomala | Hollenberg | image |
| Polysiphonia apiculata | Hollenberg | Pacific Sci. | 22: 61, figs. 1D, 8, 9 | 1968 |
| Polysiphonia aquamara | I.A. Abbott | image |
| Polysiphonia arachnoidea | (Agardh) Zanardini | image |
| Polysiphonia arachnoidea f. arachnoidea | J. Agardh | image |
| Polysiphonia arachnoidea f. humilior | Schiffner | image |
| Polysiphonia arachnoidea f. melagonium | (Meneghini) J. Agardh | image |
| Polysiphonia arachnoidea var. purpurea | (C. Agardh) Zanardini | image |
| Polysiphonia arachnoidea var. purpurea | Zanardini | image |
| Polysiphonia arborescens | Kützing | image |
| Polysiphonia arctica | J. Agardh | Sp. alg. | 2: 1034 | 1863 |
| Polysiphonia arenaria | Harvey | image |
| Polysiphonia arenaria | Kützing | image |
| Polysiphonia arenaria | Postels & Ruprecht | image |
| Polysiphonia arenicola | Kützing | image |
| Polysiphonia argentinica | Taylor | image |
| Polysiphonia argus | Kützing | image |
| Polysiphonia arietina | Bailey | image |
| Polysiphonia arietina | Bailey ms. | image |
| Polysiphonia armata | J. Agardh | image |
| Polysiphonia aspera | Zanardini ex A. De Toni | image |
| Polysiphonia asperula | (Kützing) Kützing | image |
| Polysiphonia asperula | Kützing | image |
| Polysiphonia aterrima | J. Hooker & Harvey | image |
| Polysiphonia atlantica | Kapraun & J. Norris | Smithsonian Contr. Mar. Sci. | 12: 226 | 1982 |
| Polysiphonia atra | Zanardini | image |
| Polysiphonia atricapilla | J. Agardh | Sp. Alg. | 2: 1054 | 1863 |
| Polysiphonia atrogrisea | Sonder | image |
| Polysiphonia atropurpurea | D. Moore | image |
| Polysiphonia atrorubens | (Wahlenberg) Endlicher | image |
| Polysiphonia atrorubescens var. agardhiana | (Greville) Le Jolis | image |
| Polysiphonia atrorubescens var. minor | W.H. Harvey | image |
| Polysiphonia atrorubescens_('atro-rubescens') | (Dillwyn) Greville | image |
| Polysiphonia atrorubescens_('atro-rubescens') | (Dillwyn) Greville f. psammicola Tilden | image |
| Polysiphonia attenuata | Zanardini | image |
| Polysiphonia attenuata | Zanardini ex A. Ee Toni | image |
| Polysiphonia aurantiaca | Kützing | image |
| Polysiphonia aurata | Harvey | Trans. Roy. Irish Acad. | 22 (Sci.): 541 | 1855 |
| Polysiphonia australiensis | Womersley | Austral. J. Bot. | 27: 491, figs. 9A-D | 1979 |
| Polysiphonia australis | (Agardh) J. Agardh | image |
| Polysiphonia australis | (C. Agardh) J. Agardh | Sp. Alg. | 2: 1044 | 1863 |
| Polysiphonia awabiensis | Noda | image |
| Polysiphonia azorica | O.C. Schmidt | image |
| Polysiphonia badia | (Dillwyn) Sprengel | image |
| Polysiphonia badia var. funicularis | (Meneghini) Kützing | image |
| Polysiphonia baileyi | (Harvey) J. Agardh | Sp. alg. | 2: 937 | 1863 |
| Polysiphonia bajacali | G.J. Hollenberg in G.J. Hollenberg & E.Y. Dawson | Pacific Naturalist | 2: 347, pl. 1: figs. 1, 2 | 1961 |
| Polysiphonia bajacali | Hollenberg | image |
| Polysiphonia balanicola | Falkenberg | image |
| Polysiphonia bambusina | Meneghini | image |
| Polysiphonia bangii | (Kützing) Kützing | image |
| Polysiphonia banyulensis | E. Coppejans | Vie et Milieu, Sér. A, Biol. Mar. | 25: 181, pls. I-III | 1976 |
| Polysiphonia barbatula | Kützing | image |
| Polysiphonia bartlingiana | Kützing | Phyc. gen.: | 416 | 1843 |
| Polysiphonia bartlingiana | Kützing | image |
| Polysiphonia baxteri | Lucas | image |
| Polysiphonia beaudettei | G.J. Hollenberg in G.J. Hollenberg & E.Y. Dawson | Pacific Naturalist | 2: 348, pl. 1: fig. 4 | 1961 |
| Polysiphonia beaudettei | Hollenberg | image |
| Polysiphonia beguinotii | Schiffner | image |
| Polysiphonia bellula | De Notaris | image |
| Polysiphonia bellula | De Notaris | image |
| Polysiphonia beltoniorum | J.M. Huisman | Algae of Australia: Marine Benthic Algae of North-western Australia. 2: | 562, fig. 166, pl. 16B | 2018 |
| Polysiphonia berkeleyi | (Mont.) J. Hooker & Harvey | image |
| Polysiphonia berkeleyi var. davisii | (J. Hooker & Harvey) Harvey | image |
| Polysiphonia berkeleyi var. davisii | (J. Hooker & Harvey) J. Hooker & Harvey | image |
| Polysiphonia bharadwajae | Sreenivasa Rao | Proceedings of the Seminar on Sea, Salt and Plants ... Bhavnagar ... 1965: | 169, figs. 1-8, Addendum (tipped in) | 1967 |
| Polysiphonia biasolettiana | Zanardini | image |
| Polysiphonia bicornis | Ohta | image |
| Polysiphonia bicornis | Sonder | image |
| Polysiphonia bicornis | Sonder | Fragmenta phytographiae Australiae ...: | 35 | 1880 |
| Polysiphonia biformis | Zanardini | image |
| Polysiphonia biformis | Zanardini | image |
| Polysiphonia bifurcata | G.J. Hollenberg in Taylor, | Allan Hancock Pacific Exped. | 12: 301, text-fig. 2 | 1945 |
| Polysiphonia bifurcata | Hollenberg | image |
| Polysiphonia binderi | (J. Agardh) Goebel | image |
| Polysiphonia binderi | Bonder | image |
| Polysiphonia binneyi | Harvey | image |
| Polysiphonia binneyi | Harvey | image |
| Polysiphonia bipinnata | Kützing | image |
| Polysiphonia bipinnata | Postels & Ruprecht | Ill. alg.: | 22 | 1840 |
| Polysiphonia bipinnata var. gemmifera | (Ruprecht) J. Agardh | image |
| Polysiphonia bipinnata var. tenuior | J. Agardh | image |
| Polysiphonia blandii_('blandi') | Harvey | Phycol. Austral. | 4: pl. CLXXXIV | 1862 |
| Polysiphonia blandii_('Blandi') | Harvey | image |
| Polysiphonia boergesenii | Baardseth | image |
| Polysiphonia boldii | M.J. Wynne & P. Edwards | Phycologia | 9: 11, figs. 1-7, 10-15 | 1970 |
| Polysiphonia boldii | Wynne & Edwards | image |
| Polysiphonia bostrichioides | Crouan fr. | image |
| Polysiphonia bostrychioides | Montagne | image |
| Polysiphonia botryocarpa | J. Hooker & Harvey | image |
| Polysiphonia brachygona | Harvey | image |
| Polysiphonia breviarticulata | (C. Agardh) Zanardini | image |
| Polysiphonia breviarticulata var. adriatica | Kützing | image |
| Polysiphonia breviarticulata var. chrysoderma | (Kützing) Schiffner | image |
| Polysiphonia breviarticulata var. mexicana | Kützing | image |
| Polysiphonia brevisegmenta | Womersley | image |
| Polysiphonia brodiei f. agardhii | Kjellman | image |
| Polysiphonia brodiei f. kuetzingii | Kjellman | image |
| Polysiphonia brodiei f. lyngbyei | Kjellman | image |
| Polysiphonia brodiei f. typica | Holmes & Batters | image |
| Polysiphonia brodiei var. angustissima | H. Van Heurck | image |
| Polysiphonia brodiei var. confluens | Kjellman | image |
| Polysiphonia brodiei var. laxa | Kjellman | image |
| Polysiphonia brodiei var. subsimplex_('sub-simplex') | Harvey | image |
| Polysiphonia brodiei var. tingitana | Bornet | image |
| Polysiphonia brodiei_('brodiaei') | (Dillwyn) Sprengel | Caroli Linnaei ... Systema vegetabilium. Editio decima sexta. Voluminis IV. Pars I. Classis 24: | 349 | 1827 |
| Polysiphonia brodiei_('Brodiaei') | (Dillwyn) Sprengel | image |
| Polysiphonia brodiei_('Brodiaei') | Zanardini ex A. De Toni | image |
| Polysiphonia bulbosa | Suhr | image |
| Polysiphonia bulbosa | Suhr mscr. | image |
| Polysiphonia byssacea | (Kützing) Kützing | image |
| Polysiphonia byssacea | Kützing | image |
| Polysiphonia byssoclados | Harvey | image |
| Polysiphonia byssoclados | Harvey | London J. Bot. | 3: 436 | 1844 |
| Polysiphonia byssoides | (Goodenough & Woodward) Greville | image |
| Polysiphonia byssoides | (Goodenough & Woodward) Sprengel | image |
| Polysiphonia byssoides var. asperula | Kützing | image |
| Polysiphonia byssoides var. bangii | Kützing | image |
| Polysiphonia byssoides var. byssacea | Kützing | image |
| Polysiphonia byssoides var. dasyiformis_('dasyaeformis') | Kützing | image |
| Polysiphonia byssoides var. dillwynii | Kützing | image |
| Polysiphonia byssoides var. lyngbyei | Kützing | image |
| Polysiphonia byssoides var. solieri_('solierii') | (J. Agardh) Ardissone | image |
| Polysiphonia byssoides var. vaga | Kützing | image |
| Polysiphonia caespitosa | (Pocock) Hollenberg | Brittonia | 20: 79 | 1968 |
| Polysiphonia caespitosa | S.D. Xiang | Journal of ZheJiang University (Science Edition) | 31: 90, fig. 1 | 2004 |
| Polysiphonia caespitula | Sonder | image |
| Polysiphonia calacantha | Harvey | Proc. Amer. Acad. Arts & Sci. | 4: 330 | 1860 |
| Polysiphonia californica | Harvey | Ner. Bor.-amer. | 2: 48 | 1853 |
| Polysiphonia californica var. plumigera | W.H. Harvey | image |
| Polysiphonia calliptera | Kützing | image |
| Polysiphonia callithamnioides | Crouan frat. | image |
| Polysiphonia callithamnium | Sonder | Bot. Zeit. | 3: 54 | 1845 |
| Polysiphonia callitricha | Kützing | image |
| Polysiphonia calodictyon | Harvey | image |
| Polysiphonia calodictyon | Harvey | image |
| Polysiphonia calodictyon | Harvey ex Kützing | Tab. Phycol. | 14: 16, pl. 46: figs. a-c | 1864 |
| Polysiphonia calodictyon var. condensata | Kützing | image |
| Polysiphonia calothrix | Harvey | Trans. Roy. Irish Acad. | 22 (Sci.): 541 | 1855 |
| Polysiphonia camerunensis | Pilger | image |
| Polysiphonia campanulata | Chiaje | image |
| Polysiphonia camptoclada | Montagne | image |
| Polysiphonia cancellata | Harvey | London J. Bot. | 3: 440 | 1844 |
| Polysiphonia capillata | De Notaris | image |
| Polysiphonia capillata | De Notaris, inval. | image |
| Polysiphonia capucina | Crouan fr. | image |
| Polysiphonia carettia | G.J. Hollenberg | Phycologia | 10: 15, fig. 3 | 1971 |
| Polysiphonia carettia | Hollenberg | image |
| Polysiphonia carmichaeliana | Harvey | image |
| Polysiphonia carnea | Kützing | image |
| Polysiphonia carnea | Kützing ms. | image |
| Polysiphonia cartilaginea | Zanardini mscr. | image |
| Polysiphonia caspia | Kützing orth. mut. | image |
| Polysiphonia caspica | Kützing | image |
| Polysiphonia castagnei | Kützing | image |
| Polysiphonia castelliana | De Notaris & Dufour | image |
| Polysiphonia caulescens | J. Agardh | image |
| Polysiphonia ceramiiformis_('ceramiaeformis') | Crouan frat. | image |
| Polysiphonia ceratoclada | Montagne | Prodromus generum specierumque phycearum novarum, in itinere ad polum antarcticum ... collectarum ...: | 5 | 1842 |
| Polysiphonia ceratoclada var. secundata | J. Hooker & Harvey | image |
| Polysiphonia cervicornis | Kützing | Flora | 30: 776, no fig. | 1847 |
| Polysiphonia cervicornis | Kützing | image |
| Polysiphonia chalarophloea | Kützing | image |
| Polysiphonia chlamydopteris | Meneghini ex A. De Toni | image |
| Polysiphonia chlamydopteris | Zanardini | image |
| Polysiphonia chrysoderma | Kützing | image |
| Polysiphonia cladorrhiza | Ardissone | image |
| Polysiphonia cladostephus | Montagne | Ann. Sci. Nat. Bot., ser. 2, | 20: 302 | 1843 |
| Polysiphonia clathrata | Suhr | image |
| Polysiphonia clavigera | Kützing | image |
| Polysiphonia clevelandii | Farlow | image |
| Polysiphonia clevelandii | Farlow ms. | image |
| Polysiphonia clevelandii | Farlow mscr. | image |
| Polysiphonia cloiophylla | (C. Agardh) J. Agardh | Sp. Alg. | 2: 934 | 1863 |
| Polysiphonia cloiophylla f. contigua | J. Agardh | image |
| Polysiphonia cloiophylla f. corymbosa | (Kützing) J. Agardh | image |
| Polysiphonia cloiophylla f. patens | J. Agardh | Sp. Alg. | 2: 935 | 1863 |
| Polysiphonia cloiophylla f. pectinata | J. Agardh | image |
| Polysiphonia coacta | Tseng | Pap. Michigan Acad. Sci. Arts & Lett. | 29: 71, pl. II | 1944 |
| Polysiphonia coarctata | Kützing | image |
| Polysiphonia coccinea | (Hudson) Sprengel | image |
| Polysiphonia codicola | Zanardini | image |
| Polysiphonia codicola | Zanardini ex Frauenfeld | Alg. Dalmat. Küste: | 61, no fig. | 1855 |
| Polysiphonia codiicola | Zanardini | image |
| Polysiphonia cokeri | Hollenberg | image |
| Polysiphonia colensoi | Hooker & Harvey | image |
| Polysiphonia colensoi | J.D. Hooker & Harvey | image |
| Polysiphonia collabens | (C. Agardh) J. Agardh | Alg. medit.: | 130 | 1842 |
| Polysiphonia collabens var. platyspira | (Kützing) Ardissone | image |
| Polysiphonia collinsii | G.J. Hollenberg | image |
| Polysiphonia collinsii | Hollenberg | image |
| Polysiphonia collinsii var. compacta | G.J. Hollenberg | Amer. J. Bot. | 31: 481, text-fig. 3 | 1944 |
| Polysiphonia collinsii var. deliquescens | G.J. Hollenberg | Amer. J. Bot. | 31: 482, text-fig. 5 | 1944 |
| Polysiphonia collinsii var. luxurians | G.J. Hollenberg | Amer. J. Bot. | 31: 482, fig. 4 | 1944 |
| Polysiphonia comatula | Kützing | image |
| Polysiphonia comatula var. penicillifera | Kützing | image |
| Polysiphonia commutata | Endlicher | image |
| Polysiphonia commutata | Kützing | image |
| Polysiphonia comoides | Harvey | image |
| Polysiphonia comosa | (C. Agardh) Endlicher | image |
| Polysiphonia comosa | Kützing | image |
| Polysiphonia comosa var. penicillifera | Kützing | image |
| Polysiphonia compacta | Lucas | image |
| Polysiphonia complanata | (C. Agardh) Sprengel | image |
| Polysiphonia complanata | (Clemente) J. Agardh | image |
| Polysiphonia concinna | G.J. Hollenberg | image |
| Polysiphonia concinna | Hollenberg | Amer. J. Bot. | 31: 474, text-fig. 10 | 1944 |
| Polysiphonia condensata | Kützing | image |
| Polysiphonia confinis | J. Hooker & Harvey ined. | image |
| Polysiphonia confusa | Hollenberg in Hollenberg & Dawson | Pacific Naturalist | 2: 350 | 1961 |
| Polysiphonia constricta | Womersley | Australian Journal of Botany | 27: 497, fig. 11F-H | 1979 |
| Polysiphonia corallicola | Grunow | image |
| Polysiphonia corallioides | Suhr ex Kützing | image |
| Polysiphonia corinaldii 'Meneghini' | | image |
| Polysiphonia corinaldii | (Meneghini) De Notaris | image |
| Polysiphonia corymbifera | (C. Agardh) Endlicher | Mantissa botanica altera. Sistens generum plantarum supplementum tertium: | 45 | 1843 |
| Polysiphonia corymbosa | J. Agardh | Sp. Alg. | 2: 977 | 1863 |
| Polysiphonia crassa | Okamura | image |
| Polysiphonia crassicollis | Børgesen | Danish Scientific Investigations in Iran, Part I: | 126, figs. 39, 40 | 1939 |
| Polysiphonia crassicollis | Børgesen | image |
| Polysiphonia crassiuscula | Harvey in Hooker | Fl. Tasman. | 2: 299 | 1859 |
| Polysiphonia cristata | Harvey | image |
| Polysiphonia curta | Montagne | Ann. Sci. Nat. Bot., ser. 2, | 20: 301 | 1843 |
| Polysiphonia curta | Montagne ex Kützing | image |
| Polysiphonia cuspidata | J. Agardh | image |
| Polysiphonia cymosa | Kützing | image |
| Polysiphonia cystophyllicola | Noda | image |
| Polysiphonia cystophyllicola | Noda | image |
| Polysiphonia dachensis | S.D. Xiang in B.-M. Xia | Flora Algarum Marinarum Sinicarum | II(VII): 154 | 2007 |
| Polysiphonia dalmatica | Kützing | image |
| Polysiphonia dalmatica | Meneghini | image |
| Polysiphonia dasiiformis_('Dasiaeformis') | Zanardini | image |
| Polysiphonia dasyiformis_('dasyaeformis') | (Kützing) Zanardini | image |
| Polysiphonia dasyiformis_('dasyaeformis') | Crouan fr. | image |
| Polysiphonia dasyoides | Zanardini | image |
| Polysiphonia daveyae | Reinbold | image |
| Polysiphonia davisii | J. Hooker & Harvey | image |
| Polysiphonia decipiens | De Notaris | image |
| Polysiphonia decipiens | Montagne | Prodromus generum specierumque phycearum novarum, in itinere ad polum antarcticum ... collectarum ...: | 5 | 1842 |
| Polysiphonia decumbens | Segi | image |
| Polysiphonia decumbens | T. Segi | J. Fac. Fish. Pref. Univ. Mie | 1: 218, figs. 17, 18; pl. 7:2 | 1951 |
| Polysiphonia decussata | Hollenberg | Amer. J. Bot. | 29: 780, fig. 6 | 1942 |
| Polysiphonia delicata | P. Díaz-Tapia in Díaz-Tapia et al. | Phycologia | 56: 611, figs. 27-46 | 2017 |
| Polysiphonia delicatula | Hollenberg | Pacific Sci. | 22: 62, fig. 1F | 1968 |
| Polysiphonia delphina | De Notaris | image |
| Polysiphonia delphina | De Notaris | image |
| Polysiphonia deludens | Falkenberg | image |
| Polysiphonia dendritica | (Agardh) Montagne | image |
| Polysiphonia dendroidea | Montagne | Ann. Sci. Nat. Bot., ser. 2, | 8: 353 | 1837 |
| Polysiphonia denticulata | Chiaje | image |
| Polysiphonia denticulata | Kützing | image |
| Polysiphonia denudata | (Dillw.) Greville | image |
| Polysiphonia denudata | (Dillwyn) Greville in W. Hooker | The English flora of Sir James Edward Smith. Vol. V (or Vol. II of Dr. Hooker's British flora). Part I. Comprising the mosses, Hepaticae, lichens, Characeae and algae: | 332 | 1833 |
| Polysiphonia derbesii f. penicillata | J. Agardh | image |
| Polysiphonia derbesii f. spinulosa | (C. Agardh) J. Agardh | image |
| Polysiphonia derbesii | Solier ex Kützing | image |
| Polysiphonia deschampsii | (Agardh) Crouan frat. | image |
| Polysiphonia determinata | (Hollenberg) A.M. Savoie & G.W. Saunders | Europ. J. Phycol. | 54: 13 | 2018 |
| Polysiphonia deusta | (Roth) Sprengel | image |
| Polysiphonia deusta f. deusta | J. Agardh | image |
| Polysiphonia deusta f. nodulosa | (J. Agardh) J. Agardh | image |
| Polysiphonia devoniensis | C.A. Maggs & M.H. Hommersand | Seaw. Brit. Isles | 1{3A}: 322, fig. 98 | 1993 |
| Polysiphonia dichocephala | Kützing | image |
| Polysiphonia dichotoma | G.J. Hollenberg | image |
| Polysiphonia dichotoma | Hollenberg | Amer. J. Bot. | 31: 477, text-figs. 6, 9 | 1944 |
| Polysiphonia dichotoma | Kützing | image |
| Polysiphonia dichotoma | Zanardini ex A. De Toni | image |
| Polysiphonia dictyura | Liebmann ex Kützing | image |
| Polysiphonia dictyurus | J. Agardh | image |
| Polysiphonia dictyurus var. clevelandii 'Farlow' | | image |
| Polysiphonia diffusa | (Hudson) Jones & Kingston | image |
| Polysiphonia dilatata | Kützing | image |
| Polysiphonia dillwynii | (Kützing) Kützing | image |
| Polysiphonia dillwynii | Kützing | image |
| Polysiphonia discolor | (Agardh) Sprengel | image |
| Polysiphonia disticha | Zanardini | image |
| Polysiphonia divaricata | (Agardh) Sprengel | image |
| Polysiphonia divaricata | Carmichael mss. | image |
| Polysiphonia divergens | J. Agardh | image |
| Polysiphonia divergens var. grevilleana | Kützing | image |
| Polysiphonia divergens var. heteronema | J. Agardh | image |
| Polysiphonia dokdoensis | D.E. Bustamante, B.Y. Won & T.O. Cho | Botanica Marina | 57: 282, figs. 1-16 | 2014 |
| Polysiphonia donghaeya | B. Kim & M.S. Kim | Nova Hedwigia | 101: 155: fig. 3 | 2015 |
| Polysiphonia dotyi | Hollenberg | image |
| Polysiphonia doubletiae | Sauvageau | image |
| Polysiphonia dubia | Suhr | image |
| Polysiphonia dubia var. imbricata | Suhr | image |
| Polysiphonia dumosa | Hook. f. & Harvey | image |
| Polysiphonia durkeei | Harvey ms. | image |
| Polysiphonia dysanophora | Kützing | image |
| Polysiphonia eastwoodiae_('Eastwoodae') | Setchell & Gardner | image |
| Polysiphonia eastwoodiae_('eastwoodae') | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci., ser. 4, | 19: 161 | 1930 |
| Polysiphonia echigoensis | Noda | image |
| Polysiphonia echigoensis | Noda | image |
| Polysiphonia echinata | Harvey | Nereis Bor.-Amer. | 2: 38 | 1853 |
| Polysiphonia elongata | (Hudson) Sprengel | Caroli Linnaei ... Systema vegetabilium. Editio decima sexta. Voluminis IV. Pars I. Classis 24: | 349 | 1827 |
| Polysiphonia elongata f. arborescens | (Kützing) Ardissone | image |
| Polysiphonia elongata f. baltica | Rosenvinge | image |
| Polysiphonia elongata f. denudata | (J. Agardh) Batters | image |
| Polysiphonia elongata f. glomerata | Gran | image |
| Polysiphonia elongata f. inflata | Ercegovic | image |
| Polysiphonia elongata f. lyngbyei | (Agardh) J. Agardh | image |
| Polysiphonia elongata f. microdendron | Levring | image |
| Polysiphonia elongata f. minor | Schiffner | image |
| Polysiphonia elongata f. nana | Gran | image |
| Polysiphonia elongata f. rosea | (Greville) Batters | image |
| Polysiphonia elongata f. ruchingeri | (Agardh) J. Agardh | image |
| Polysiphonia elongata f. schuebeleri_('schuebelerii') | (Foslie) Rosenvinge | image |
| Polysiphonia elongata f. typica | Kylin | image |
| Polysiphonia elongata | Kützing | image |
| Polysiphonia elongata subf. glomerata | Levring | image |
| Polysiphonia elongata var. arborescens | (Kützing) Ardissone | image |
| Polysiphonia elongata var. arborescens | (Kützing) Schiffner | image |
| Polysiphonia elongata var. autumnalis | J. Agardh | image |
| Polysiphonia elongata var. denudata | (Agardh) Zanardini | image |
| Polysiphonia elongata var. denudata | (Harvey) J. Agardh | image |
| Polysiphonia elongata var. denudata | Harvey | image |
| Polysiphonia elongata var. denudata | Montagne | image |
| Polysiphonia elongata var. denudata | Zanardini | image |
| Polysiphonia elongata var. expansa | (Agardh) J. Agardh | image |
| Polysiphonia elongata var. haematites | (Kützing) Schiffner | image |
| Polysiphonia elongata var. hornotina | J. Agardh | image |
| Polysiphonia elongata var. luxurians | (Agardh) J. Agardh | image |
| Polysiphonia elongata var. microdendron | (J. Agardh) Gran | image |
| Polysiphonia elongata var. penicilligara | J. Agardh | image |
| Polysiphonia elongata var. prolifera | (Agardh) Zanardini | image |
| Polysiphonia elongata var. prolifera | J. Agardh | image |
| Polysiphonia elongata var. prolifera | Zanardini | image |
| Polysiphonia elongata var. robustissima | Zanardini | image |
| Polysiphonia elongata var. rosea | (Greville) J. Agardh | image |
| Polysiphonia elongata var. sanguinolenta | (C. Agardh) Harvey | image |
| Polysiphonia elongata var. simplex | (Hudson) Sprengel | image |
| Polysiphonia elongata var. spinulosa | (Agardh) Zanardini | image |
| Polysiphonia elongata var. spinulosa | Zanardini | image |
| Polysiphonia elongata var. vernalis | J. Agardh | image |
| Polysiphonia elongella | Harvey in W.J. Hooker | Brit. Fl. | 2{1}: 334 | 1833 |
| Polysiphonia elongella | Meneghini | image |
| Polysiphonia episcopalis | Zanardini | image |
| Polysiphonia episcopalis | Zanardini ex A. De Toni | image |
| Polysiphonia episcopalis | Zanardini mscr. | image |
| Polysiphonia ericoides | Harvey in J. Hooker & Harvey | London J. Bot. | 6: 400 | 1847 |
| Polysiphonia erythraea | J. Agardh | image |
| Polysiphonia erythrocoma | Kützing | image |
| Polysiphonia exigua | Kützing | image |
| Polysiphonia exilis | Harvey | Smithsonian Contr. Knowl. | 5{5}: 47 | 1853 |
| Polysiphonia exilis | Kützing | image |
| Polysiphonia expansa | (Agardh) Endlicher | image |
| Polysiphonia expansa | Zanardini | image |
| Polysiphonia falcata | Kützing | Tab. Phycol. | 13: 12, pl. 34: figs. a-c | 1863 |
| Polysiphonia falcata | Kützing | image |
| Polysiphonia fasciculata | Harvey ex D. Moore | image |
| Polysiphonia fasciculata | Kützing | image |
| Polysiphonia fasciculifera | Kützing | image |
| Polysiphonia fastigiata | (Roth) Greville | image |
| Polysiphonia fastigiata | (Roth) Sprengel | image |
| Polysiphonia ferox | J. Agardh | image |
| Polysiphonia ferulacea f. implicata | C.K. Tseng | Pap. Michigan Acad. Sci. Arts & Lett. | 29: 76, pl. III: figs. 4-7 | 1944 |
| Polysiphonia ferulacea f. implicata | Tseng | image |
| Polysiphonia ferulacea | Suhr ex J. Agardh | Sp. Alg. | 2: 980 | 1863 |
| Polysiphonia fibrata | (Dillwyn) Harvey | image |
| Polysiphonia fibrillosa | (C. Agardh) Sprengel | Syst. veg. | 4{1}: 349 | 1827 |
| Polysiphonia fibrillosa | (Dillwyn) Sprengel | image |
| Polysiphonia fibrillosa var. spinifera | J. Agardh | image |
| Polysiphonia figariana | Zanardini | image |
| Polysiphonia filamentosa | (Wulfen) Sprengel | image |
| Polysiphonia filipendula | Harvey | image |
| Polysiphonia filipendula | Harvey ex J. Agardh | Sp. Alg. | 2: 920 | 1863 |
| Polysiphonia firma | Zanardini | image |
| Polysiphonia flabelliformis | J. Hooker & Harvey | image |
| Polysiphonia flabellulata | Harvey | Proc. Amer. Acad. Arts & Sci. | 4: 330 | 1860 |
| Polysiphonia flaccida | Rabenhorst | image |
| Polysiphonia flaccidissima | G.J. Hollenberg | Amer. J. Bot. | 29: 783, fig. 8 | 1942 |
| Polysiphonia flaccidissima var. decimera | Hollenberg | image |
| Polysiphonia flaccidissima var. iki | Hollenberg | image |
| Polysiphonia flaccidissima var. lopi | Hollenberg | image |
| Polysiphonia flaccidissima var. smithii | G.J. Hollenberg | Amer. J. Bot. | 29: 784, text-fig. 19 | 1942 |
| Polysiphonia flaccidissima var. smithii | Hollenberg | image |
| Polysiphonia flagellifera | Reinsch | image |
| Polysiphonia flavescens | Zanardini | image |
| Polysiphonia flexella | (C. Agardh) J. Agardh | image |
| Polysiphonia flexella var. acanthotricha | (Kützing) Piccone | image |
| Polysiphonia flexella var. genuina | Schiffner | image |
| Polysiphonia flexella var. subverticillata | Strafforello | image |
| Polysiphonia flexicaulis | (Harv.) Collins | image |
| Polysiphonia floccosa | Zanardini | image |
| Polysiphonia flocculosa | (C. Agardh) Endlicher | image |
| Polysiphonia foeniculacea | (C. Agardh) Sprengel | image |
| Polysiphonia foeniculacea var. eximia | Schiffner | image |
| Polysiphonia foeniculacea var. genuina | Schiffner | image |
| Polysiphonia foeniculacea var. lagunarum | Schiffner | image |
| Polysiphonia foetidissima | Cocks | image |
| Polysiphonia foetidissima | Cocks | image |
| Polysiphonia foetidissima | Cocks | image |
| Polysiphonia foetidissima | Cocks ex Bornet | Mém. Soc. Natl. Sci. Nat. et Math. Cherbourg | 28: 314 | 1892 |
| Polysiphonia forcipata | Harvey | image |
| Polysiphonia forcipata | Harvey | image |
| Polysiphonia forcipata | Harvey | Trans. R. Irish Acad. | 22(Science): 541 | 1855 |
| Polysiphonia forcipata | J. Agardh | image |
| Polysiphonia forfex | Harvey | Phycol. Austral. | 2: pl. XCVI | 1859 |
| Polysiphonia formosa | (Suhr) Harvey | image |
| Polysiphonia fracta | Harvey | image |
| Polysiphonia fracta | Harvey | image |
| Polysiphonia fragilis | Shperk | image |
| Polysiphonia fragilis | Shperk | Ocherki Alg. Fl. Chernago Morya: | 64 | 1869 |
| Polysiphonia fragilis | Suringar | image |
| Polysiphonia freshwateri | D.E. Bustamante, B.Y. Won, & T.O. Cho | Eur. J. Phycol. | 50: 332, figs. 1-20 | 2015 |
| Polysiphonia frutex | Harvey | image |
| Polysiphonia fruticulosa | (Wulfen) Sprengel | image |
| Polysiphonia fruticulosa f. pusilla | Bornet | image |
| Polysiphonia fruticulosa var. genuina | Bornet | image |
| Polysiphonia fruticulosa var. pilosissima | Schiffner | image |
| Polysiphonia fruticulosa var. tenuior | (Agardh) Zanardini | image |
| Polysiphonia fruticulosa var. tenuior | Zanardini | image |
| Polysiphonia fruticulosa var. tenuissima | H. Van Heurck | image |
| Polysiphonia fruticulosa var. wulfenii | Bornet | image |
| Polysiphonia fruticulosa var. wulfenii_('wulfeni') | (Roth) Rodríguez y Femenías | image |
| Polysiphonia fucoides | (Hudson) Greville in W. Hooker | The English flora of Sir James Edward Smith. Vol. V (or Vol. II of Dr. Hooker's British flora). Part I. Comprising the mosses, Hepaticae, lichens, Characeae and algae: | 332 | 1833 |
| Polysiphonia fuliginosa | Kützing | image |
| Polysiphonia fuliginosa | Rudolphi | Linnaea | 6: 177 | 1831 |
| Polysiphonia fuliginosa | Suhr | image |
| Polysiphonia funebris | De Notaris | image |
| Polysiphonia funebris | De Notaris | image |
| Polysiphonia funebris | De Notaris ex J. Agardh | image |
| Polysiphonia funicularis | (Meneghini ex Kützing) Kützing | image |
| Polysiphonia funicularis | Meneghini | image |
| Polysiphonia funicularis | Meneghini mscr. | image |
| Polysiphonia furcata | Meneghini ex A. De Toni | image |
| Polysiphonia furcellata | (C. Agardh) Harvey | image |
| Polysiphonia furcellata f. forcipata | (J. Agardh) J. Agardh | image |
| Polysiphonia furcellata f. patula | J. Agardh | image |
| Polysiphonia furcellata var. forcipata | (J. Agardh) Ardissone | image |
| Polysiphonia furcellata var. patula | (J. Agardh) Piccone | image |
| Polysiphonia fuscescens | Harvey | image |
| Polysiphonia fuscorubens_('fusco-rubens') | J. Hooker & Harvey | image |
| Polysiphonia gardneri | Kylin | Lunds Univ. A\*orsskr., N.F., Avd. 2, | 37{2}: 38 | 1941 |
| Polysiphonia gaudichaudii | (C. Agardh) Kützing | image |
| Polysiphonia gelidii | Zanardini | image |
| Polysiphonia gemmifera | Yates | image |
| Polysiphonia gibbesii | Harvey | image |
| Polysiphonia giraudii | Derb. & Sol. | image |
| Polysiphonia glomerulata | (Agardh) Sprengel | image |
| Polysiphonia glomerulata | (C. Agardh) Sprengel | Caroli Linnaei ... Systema vegetabilium. Editio decima sexta. Voluminis IV. Pars I. Classis 24: | 350 | 1827 |
| Polysiphonia gonatophora | Kützing | image |
| Polysiphonia gonatophora var. rigidula | Kützing | image |
| Polysiphonia gopnathensis | Thivy & Rao | image |
| Polysiphonia gopnathensis | Thivy & Sreenivasa Rao | Botanica Marina | 5: 25, pls. I, II | 1963 |
| Polysiphonia gorgoniae | Harvey | Smithsonian Contr. Knowl. | 5{5}: 39 | 1853 |
| Polysiphonia gracilis | C.K. Tseng | Pap. Michigan Acad. Sci. Arts & Lett. | 29: 75, pl. III: figs. 2, 3 | 1944 |
| Polysiphonia gracilis | Crouan frat. | image |
| Polysiphonia gracilis | Greville mss. | image |
| Polysiphonia gracilis | Shperk | Ocherki Alg. Fl. Chernago Morya: | 65 | 1869 |
| Polysiphonia gracilis | Tseng | image |
| Polysiphonia grateloupeoides | Noda | image |
| Polysiphonia grevillei_('grevillii') | Harvey | image |
| Polysiphonia griffithsiana | (J.E. Smith) L.P. Jones & Kingston | Fl. Devon. 2: | 55 | 1829 |
| Polysiphonia griffithsiana | Harvey | image |
| Polysiphonia grisea | Bertoloni | Fl. Ital. Cryptog. | 2: 272 | 1867 |
| Polysiphonia grisea | Kützing | image |
| Polysiphonia guadalupensis | Setchell & Gardner | image |
| Polysiphonia guadalupensis | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci., ser. 4, | 19: 162 | 1930 |
| Polysiphonia guernisacii_('Guernisaci') | (Crouan) J. Agardh | image |
| Polysiphonia gunniana | Harvey | London J. Bot. | 3: 437 | 1844 |
| Polysiphonia haematites | Kützing | image |
| Polysiphonia hakodatensis | Yendo | Bot. Mag. [Tokyo] | 34: 7 | 1920 |
| Polysiphonia hamulifera | Kützing | image |
| Polysiphonia hancockii | Dawson | image |
| Polysiphonia hancockii | E.Y. Dawson | Allan Hancock Pacific Exped. | 3: 331, pl. 50: fig. 2 | 1944 |
| Polysiphonia hapalacantha | Harvey | image |
| Polysiphonia haplodasyae | Womersley | image |
| Polysiphonia harlandii f. minutissima | Tseng | image |
| Polysiphonia harlandii f. typica | Tseng | image |
| Polysiphonia harlandii | Harvey | Proc. Amer. Acad. Arts & Sci. | 4: 330 | 1860 |
| Polysiphonia harveyi | Bailey | Amer. J. Sci. & Arts, ser. 2 | 6: 38 | 1848 |
| Polysiphonia harveyi var. arietina | Harvey | Ner. bor.-amer. | 2: 41 | 1853 |
| Polysiphonia harveyi var. olneyi | (Harvey) Collins | image |
| Polysiphonia hassleri | Taylor | image |
| Polysiphonia havanensis f. binneyi | (Harvey) J. Agardh | image |
| Polysiphonia havanensis f. havanensis | J. Agardh | image |
| Polysiphonia havanensis f. insidiosa | J. Agardh | image |
| Polysiphonia havanensis f. mucosa | J. Agardh | image |
| Polysiphonia havanensis | Montagne | image |
| Polysiphonia hawaiiensis | G.J. Hollenberg | Pacific Sci. | 22: 66, figs. 2F, 16, 41 | 1968 |
| Polysiphonia hawaiiensis | Hollenberg | image |
| Polysiphonia hemisphaerica | Areschoug | Öfv. K. [Svenska] VetAkad. Förh. | 27: 936, adnot. | 1871 |
| Polysiphonia hemisphaerica | J.E. Areschoug | image |
| Polysiphonia hemisphaerica var. boldii | (M.J. Wynne & P. Edwards) J. Rueness | Phycologia | 12: 109 | 1972 |
| Polysiphonia hemisphaerica var. boldii | (Wynne & Edwards) J. Rueness | image |
| Polysiphonia hendryi | Gardner | image |
| Polysiphonia hendryi | N.L. Gardner | Univ. Calif. Publ. Bot. | 14: 101, pl 24: figs. 1, 2; pl. 25. | 1927 |
| Polysiphonia hendryi var. compacta | (G.J. Hollenberg) G.J. Hollenberg in Hollenberg & Dawson | Pacific Naturalist | 2: 356 | 1961 |
| Polysiphonia hendryi var. compacta | (Hollenberg) Hollenberg | image |
| Polysiphonia hendryi var. deliquescens | (G.J. Hollenberg) G.J. Hollenberg in Hollenberg & Dawson | Pacific Naturalist | 2: 356 | 1961 |
| Polysiphonia hendryi var. deliquescens | (Hollenberg) Hollenberg | image |
| Polysiphonia hendryi var. gardneri | (Kylin) Hollenberg in Hollenberg & Dawson | Pacific Naturalist | 2: 355 | 1961 |
| Polysiphonia hendryi var. luxurians | (G.J. Hollenberg) G.J. Hollenberg in Hollenberg & Dawson, | Pac. Nat. | 2: 356 | 1961 |
| Polysiphonia hendryi var. luxurians | (Hollenberg) Hollenberg | image |
| Polysiphonia heringii | Harvey | Ner. Austral.: | 47 | 1847 |
| Polysiphonia herpa | G.J. Hollenberg | Pacific Sci. | 22: 68, figs. 1 I, 2 G | 1968 |
| Polysiphonia heteroclada | J. Agardh | image |
| Polysiphonia hillebrandii | Bornet in Ardissone, | Memorie della Società Crittogamologica Italiana | 1: 376 | 1883 |
| Polysiphonia hirsuta | (Roth) Wallroth | image |
| Polysiphonia hirsuta | Zanardini | image |
| Polysiphonia hirta | J. Agardh | image |
| Polysiphonia hispida f. vestita | (J. Agardh) Hauck | image |
| Polysiphonia hispida | Zanardini in Kützing | Tab. Phyc. | 14: 19, pl. 52: figs. d-g | 1864 |
| Polysiphonia hochstetteriana | O.C. Schmidt | image |
| Polysiphonia hollenbergii | J.N. Norris | Smithsonian Contrib. Bot. | 96: 275, fig. 134 | 2014 |
| Polysiphonia homoia | Setchell & Gardner | image |
| Polysiphonia homoia | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci., ser. 4, | 19: 162 | 1930 |
| Polysiphonia hookeri | Harvey | Ner. Austral.: | 40 | 1847 |
| Polysiphonia hooperi | Bailey ms. | image |
| Polysiphonia howei | G.J. Hollenberg in W.R. Taylor | Allan Hancock Pacific Exped. | 12: 302, fig. 3 | 1945 |
| Polysiphonia howei | Hollenberg | image |
| Polysiphonia humilis | Kützing | image |
| Polysiphonia hypnoides | Welwitsch | image |
| Polysiphonia hystrix | J. Hooker & Harvey in Harvey | Ner. Austral.: | 41, pl. XIV | 1847 |
| Polysiphonia implexa | J. Hooker & Harvey | image |
| Polysiphonia implexa | J. Hooker & Harvey | image |
| Polysiphonia impolita | Zanardini | image |
| Polysiphonia incompa | De Notaris, inval. | image |
| Polysiphonia incompta | De Notaris, inval. | image |
| Polysiphonia incompta | Harvey | Ner. Austral.: | 44 | 1847 |
| Polysiphonia inconspicua | G.J. Hollenberg | image |
| Polysiphonia inconspicua | Hollenberg | Amer. J. Bot. | 31: 479 | 1944 |
| Polysiphonia inconspicua | Reinsch | image |
| Polysiphonia incurva | Zanardini | image |
| Polysiphonia indigena | Hollenberg | Bull. Torrey Bot. Club | 85: 63 | 1958 |
| Polysiphonia infestans | Harvey | Trans. R. Irish Acad. | 22(Science): 539 | 1855 |
| Polysiphonia inflata | G. Martens | Die Preussische Expedition nach Ost-Asien. Nach amtlichen Quellen. Botanischer Theil: | 31, pl. VII: fig. 2 | 1868 |
| Polysiphonia inflata | V. Martens | image |
| Polysiphonia insidiosa | Crouan frat. | image |
| Polysiphonia insidiosa | Greville ex J. Agardh | Sp. Alg. | 2: 926 | 1863 |
| Polysiphonia insignis | Crouan frat. | image |
| Polysiphonia intricata | (C. Agardh) J. Agardh | image |
| Polysiphonia intricata var. crassa | Ardissone | image |
| Polysiphonia intricata var. simplicior | J. Agardh | image |
| Polysiphonia inversa | Sonder | Bot. Zeit. | 3: 53 | 1845 |
| Polysiphonia irregularis | Zanardini mscr. | image |
| Polysiphonia irregularis | Zanardini mscr. | image |
| Polysiphonia isogona | Harvey in Hooker | Fl. Nov.-Zel. | 2: 231 | 1855 |
| Polysiphonia jacobi | De Notaris | Prosp. Fl. Ligust.: | 67 | 1846 |
| Polysiphonia jacobii_('Jacobi') | De Notaris | image |
| Polysiphonia jacobii_('Jacobi') | De Notaris ex Kützing | Tab. Phyc. | 13: 28, pl. 89 | 1863 |
| Polysiphonia jacobii_('jacobi') | G. De Notaris | image |
| Polysiphonia japonica | Harvey | Narrative Perry Exped. | 2: 331 | 1857 |
| Polysiphonia japonica var. forfex | (Harvey) H.Y. Yoon | Korean J. Phycol. | 1: 36 | 1986 |
| Polysiphonia japonica var. savatieri | (Hariot) H.Y. Yoon | Korean J. Phycol. | 1: 34 | 1986 |
| Polysiphonia japonica var. teradomariensis | (M. Noda) H.Y. Yoon | Korean J. Phycol. | 1: 38 | 1986 |
| Polysiphonia javanica | G. Martens | Die Preussische Expedition nach Ost-Asien. Nach amtlichen Quellen. Botanischer Theil: | 31, 98-99, pl. VII: fig. 3 | 1868 |
| Polysiphonia javanica | V. Martens | image |
| Polysiphonia johnstonii | Setchell & Gardner | image |
| Polysiphonia johnstonii | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci. IV | 12: 767 | 1924 |
| Polysiphonia johnstonii var. concinna | (Hollenberg) Hollenberg in Hollenberg & Dawson | Pacific Naturalist | 2: 358 | 1961 |
| Polysiphonia juncea | Kützing | image |
| Polysiphonia kampsaxii | Børgesen | Danish Scientific Investigations in Iran, Part I: | 122, figs. 35-38 | 1939 |
| Polysiphonia kampsaxii | Børgesen | image |
| Polysiphonia kappannae_('kappannai') | Sreenivasa Rao in Krishnamurthy, | Proceedings of the Seminar on Sea, Salt and Plants ... Bhavnagar ... 1965: | 172-174, figs. 9-16, Addendum | 1967 |
| Polysiphonia kapraunii | B. Stuercke & D.W. Freshwater | Bot. Mar. | 53: 305, figs. 13-23 | 2010 |
| Polysiphonia kellneri | G. Zanardini | image |
| Polysiphonia kieliana | Kaminski & Nizamuddin | image |
| Polysiphonia kimiae | J.M. Huisman | Algae of Australia: Marine Benthic Algae of North-western Australia. 2: | 657, fig. 169A-F | 2018 |
| Polysiphonia koreana | D.E. Bustamante, B.Y. Won, & T.O. Cho | Eur. J. Phycol. | 50: 332, figs. 21-36 | 2015 |
| Polysiphonia kotschyana | Grunow | image |
| Polysiphonia kowiensis | H. Stegenga, J.J. Bolton, & R.J. Anderson | Contr. Bolus Herb. | 18: 547, pl. 231 | 1997 |
| Polysiphonia krausii | Sonder | image |
| Polysiphonia kuetzingii_('Kützingii') | Meneghini | image |
| Polysiphonia laevigata | Kützing | image |
| Polysiphonia laevigata var. forcipata | (J. Agardh) Kützing | image |
| Polysiphonia lanosa | (L.) G. Tandy | image |
| Polysiphonia lasiorhiza | Kützing | image |
| Polysiphonia lasiotricha | Kützing | image |
| Polysiphonia latiovalis | Noda | image |
| Polysiphonia latiovalis | Noda | image |
| Polysiphonia lawrenciana | Harvey | London J. Bot. | 3: 438 | 1844 |
| Polysiphonia laxa | Harvey | image |
| Polysiphonia laxa | Harvey in Hooker | Fl. Tasman. | 2: 300 | 1859 |
| Polysiphonia laxa | Kützing | image |
| Polysiphonia laxiuscula | Meneghini ex Kützing | image |
| Polysiphonia lepadicola | (H.C. Lyngbye) K.P.J. Sprengel | image |
| Polysiphonia lepadicola | (Lyngbye) Sprengel | Caroli Linnaei ... Systema vegetabilium. Editio decima sexta. Voluminis IV. Pars I. Classis 24: | 348 | 1827 |
| Polysiphonia lepadicola var. intricata | (Agardh) Zanardini | image |
| Polysiphonia lepadicola var. intricata | Zanardini | image |
| Polysiphonia lepadicola var. paradoxa | Meneghini | image |
| Polysiphonia leptoclada | (Montagne) Kützing | image |
| Polysiphonia leptoclonia | Zanardini ex A. De Toni | image |
| Polysiphonia leptothrix | Zanardini | image |
| Polysiphonia leptura f. depauperata | Schiffner | image |
| Polysiphonia leptura | Kützing | image |
| Polysiphonia ligustica | De Notaris herb. | image |
| Polysiphonia linocladia | Kützing | image |
| Polysiphonia lithophila | Kützing | image |
| Polysiphonia lithophila | Zanardini | image |
| Polysiphonia littoralis | Harvey ms. | image |
| Polysiphonia littoralis | Harvey mscr. | image |
| Polysiphonia littoralis | Harvey in J. Agardh | Sp. Alg. | 2: 980 | 1863 |
| Polysiphonia lobophoralis | N.R. Mamoozadeh & D.W. Freshwater | Bot. Mar. | 55: 331, figs. 32-40 | 2012 |
| Polysiphonia longiarticulata | G. Zanardini | image |
| Polysiphonia longissima | J. Agardh | image |
| Polysiphonia lophoclados | (Montagne) Kützing | image |
| Polysiphonia lophura | Kützing | image |
| Polysiphonia lophuroides | Kützing | image |
| Polysiphonia lubrica | (C. Agardh) Zanardini | image |
| Polysiphonia lusitanica | Montagne | image |
| Polysiphonia lusitanica | Montagne ex Kützing | image |
| Polysiphonia lutensis | G. Zanardini | image |
| Polysiphonia luxurians | (C. Agardh) Postels & Ruprecht | image |
| Polysiphonia lyallii | J. Hooker & Harvey in J. Hooker | Fl. Antarct.: | 182, pl. LXXIV (upper) | 1845 |
| Polysiphonia lyallii | J.D. Hooker & Harvey | image |
| Polysiphonia lyngbyei | (C. Agardh) Harvey | image |
| Polysiphonia lyngbyei | Kützing | image |
| Polysiphonia lyngbyei var. robusta | (Kützing) Rabenhorst | image |
| Polysiphonia lyngbyei var. trichodes | (Kützing) Rabenhorst | image |
| Polysiphonia macounii | G.J. Hollenberg | Amer. J. Bot. | 29: 780, text-figs. 7, 14 | 1942 |
| Polysiphonia macounii | Hollenberg | image |
| Polysiphonia macra | Harvey | image |
| Polysiphonia macrarthra | Zanardini | image |
| Polysiphonia macrocarpa | (C. Agardh) K.P.J. Sprengel | image |
| Polysiphonia macrocarpa | Harvey | image |
| Polysiphonia macrocarpa | Harvey | In J.T. Mackay, Flora hibernica ....: | 206 | 1836 |
| Polysiphonia macrocephala | Zanardini | image |
| Polysiphonia macroclonia | Kützing | image |
| Polysiphonia mallardiae | (Harvey) Harvey | Ner. Austral.: | 40 | 1847 |
| Polysiphonia mallardiae | (Harvey) Kützing | image |
| Polysiphonia marchantiae_('marchantae') | Setchell & Gardner | image |
| Polysiphonia marchantiae_('Marchantae') | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci., ser. 4, | 12: 768, pl. 49,a | 1924 |
| Polysiphonia marrowii | Harvey | image |
| Polysiphonia martensiana | Kützing | Phyc. Gen.: | 432 | 1843 |
| Polysiphonia martensiana | Kützing | image |
| Polysiphonia masonii | Setchell & Gardner | image |
| Polysiphonia masonii | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci. IV | 19: 160 | 1930 |
| Polysiphonia megarthra | Zanardini ex A. De Toni | image |
| Polysiphonia melagonium | Meneghini | image |
| Polysiphonia melanochroa | Kützing | image |
| Polysiphonia meneghiniana | De Notaris | image |
| Polysiphonia meneghiniana | De Notaris | image |
| Polysiphonia micracantha | Zanardini | image |
| Polysiphonia micracantha | Zanardini ex A. De Toni | image |
| Polysiphonia micrantha "Zanardini" | | image |
| Polysiphonia microcarpa | J. Hooker & Harvey | image |
| Polysiphonia microdendron | J. Agardh | image |
| Polysiphonia miniata | (Agardh) Endlicher | image |
| Polysiphonia minutissima | Hollenberg | Amer. J. Bot. | 29: 781, text-fig. 21 | 1942 |
| Polysiphonia moestingii_('Möstingii') | (Lyngbye) Sprengel | image |
| Polysiphonia mollis | J. Hooker & Harvey in Harvey | Ner. Austral.: | 43 | 1847 |
| Polysiphonia mollis | J. Hooker & W.H. Harvey | image |
| Polysiphonia mollis | J. Hooker ex Kützing | image |
| Polysiphonia mollis var. tongatensis | (Harvey ex Kützing) Hollenberg | Pacific Sci. | 22: 69-70, fig. 43 | 1968 |
| Polysiphonia mollis var. tongatensis | (W.H. Harvey ex F.T. Kützing) G.J. Hollenberg | image |
| Polysiphonia monilifera | J. Hooker & Harvey | image |
| Polysiphonia monocarpa | Montagne | Ann. Sci. Nat. Bot., ser. 2, | 18: 254 | 1842 |
| Polysiphonia montagnei | De Notaris | image |
| Polysiphonia montagnei | De Notaris | image |
| Polysiphonia montagnei | De Notaris | image |
| Polysiphonia montagnei | De Notaris ex Kützing | image |
| Polysiphonia morisiana | J. Agardh | image |
| Polysiphonia moritziana | Sonder ex Kützing | Species algarum: | 838 | 1849 |
| Polysiphonia moritziana | Sonder ex Kützing | image |
| Polysiphonia morroides | B. Kim & M.S. Kim | Algae | 29: 190, fig. 3 | 2014 |
| Polysiphonia morrowii | Harvey | Narrative Perry Exped. | 2: 331 | 1857 |
| Polysiphonia morrowii | W.H. Harvey | image |
| Polysiphonia mottei | M. Lauret | image |
| Polysiphonia mucosa | Crouan fr. | image |
| Polysiphonia mucronata | Kützing | image |
| Polysiphonia muelleriana | J. Agardh | Öfvers. K. [Svenska] Vet.-Akad. Förh. | 27: 455, no fig. | 1870 |
| Polysiphonia multicapsularis | Zanardini | image |
| Polysiphonia multifida | Duby | image |
| Polysiphonia multifida | Kützing | image |
| Polysiphonia muninsula | B. Kim & M.S. Kim | Nova Hedwigia | 101: 153, fig. 2 | 2015 |
| Polysiphonia mutabilis | Harvey | Trans. R. Irish Acad. | 22(Science): 540 | 1855 |
| Polysiphonia myriococca | Montagne | image |
| Polysiphonia namibiensis | H. Stegenga & Engeldow in H. Stegenga, J.J. Bolton, & R.J. Anderson | Contr. Bolus Herb. | 18: 550, pl. 232 | 1997 |
| Polysiphonia namibiensis | H. Stegenga, J.J. Bolton, & R.J. Anderson | image |
| Polysiphonia nana | Harvey | image |
| Polysiphonia nana | Kützing | Species algarum: | 897 | 1849 |
| Polysiphonia nana | Kützing | image |
| Polysiphonia nana | Kützing | image |
| Polysiphonia nathanielii | Hollenberg | Bull. Torrey Bot. Club | 85: 63 | 1958 |
| Polysiphonia nebulosa | Zanardini | image |
| Polysiphonia neglecta | Harvey mss. nom. nudum | image |
| Polysiphonia neglecta | W.H. Harvey | image |
| Polysiphonia nemalionis | Zanardini | image |
| Polysiphonia nhatrangensis | Pham Hoàng Hô | image |
| Polysiphonia nigra | (Hudson) Batters | image |
| Polysiphonia nigra var. agardhiana | (Greville) Batters | image |
| Polysiphonia nigrella | Crouan frat. | image |
| Polysiphonia nigrescens | (Hudson) Greville in W. Hooker | The English flora of Sir James Edward Smith. Vol. V (or Vol. II of Dr. Hooker's British flora). Part I. Comprising the mosses, Hepaticae, lichens, Characeae and algae: | 332 | 1833 |
| Polysiphonia nigrescens | (Hudson) Wallroth | image |
| Polysiphonia nigrescens | (W. Hudson) R.K. Greville | image |
| Polysiphonia nigrescens f. affinis | (Moore) J. Agardh | image |
| Polysiphonia nigrescens f. fasciculata v. | Suhr | image |
| Polysiphonia nigrescens f. fastigiata | Suringar | image |
| Polysiphonia nigrescens f. fastigiata v. | Suhr | image |
| Polysiphonia nigrescens f. flaccida | (Areschoug) Rosenvinge | image |
| Polysiphonia nigrescens f. fucoides | J.G. Agardh | image |
| Polysiphonia nigrescens f. pectinata | (C. Agardh) J. Agardh | image |
| Polysiphonia nigrescens f. pectinata v. | Suhr | image |
| Polysiphonia nigrescens f. pinnata | Suringar | image |
| Polysiphonia nigrescens f. protensa | J. Agardh | image |
| Polysiphonia nigrescens f. reducta | Svedelius | image |
| Polysiphonia nigrescens f. senticosa | (Suhr) J. Agardh | image |
| Polysiphonia nigrescens var. affinis | (Moore) Harvey | image |
| Polysiphonia nigrescens var. congesta | Lenormand | image |
| Polysiphonia nigrescens var. congesta | Lenormand | image |
| Polysiphonia nigrescens var. congesta | Lenormand | image |
| Polysiphonia nigrescens var. delicatissima | H. Van Heurck | image |
| Polysiphonia nigrescens var. disticha | Harvey | image |
| Polysiphonia nigrescens var. durkeei | Harvey | image |
| Polysiphonia nigrescens var. flaccida | Areschoug | image |
| Polysiphonia nigrescens var. fucoides | (W. Hudson) W.H. Harvey | image |
| Polysiphonia nigrescens var. gracilis | Kjellman | image |
| Polysiphonia nigrescens var. gracillima | Harvey | image |
| Polysiphonia nigrescens var. plumosa | Harvey | image |
| Polysiphonia nigrescens var. secundata | Suhr ex Rabenhorst | image |
| Polysiphonia nigrescens var. tenuis | Harvey | image |
| Polysiphonia nigrita | Sonder | Bot. Zeit. | 3: 53 | 1845 |
| Polysiphonia nipponica | Segi | image |
| Polysiphonia nitens | Meneghini | image |
| Polysiphonia nivea | Greville mscr. | image |
| Polysiphonia nivea | Greville mscr. | image |
| Polysiphonia nizamuddinii | Farooqui & Begum | Nova Hedwigia | 29: 814, figs. 1-10, photos A-D | 1978 |
| Polysiphonia nizamuddinii | Farooqui & M. Begum | image |
| Polysiphonia nodifera | Kützing | image |
| Polysiphonia nodulosa | J.G. Agardh | image |
| Polysiphonia notarisii | Meneghini | image |
| Polysiphonia notoensis | Segi | image |
| Polysiphonia notoensis | T. Segi | J. Fac. Fish. Pref. Univ. Mie | 1: 266, fig. 35, pl. 16:1 | 1951 |
| Polysiphonia novae-angliae | W.R. Taylor | image |
| Polysiphonia nuda | N.R. Mamoozadeh & D.W. Freshwater | Bot. Mar. | 55: 335, figs. 46-51 | 2012 |
| Polysiphonia nutans | Montagne | image |
| Polysiphonia obscura | (C. Agardh) J. Agardh | Alg. Medit.: | 123 | 1842 |
| Polysiphonia obsoleta | Segi | image |
| Polysiphonia ocellata | Gratel. | image |
| Polysiphonia ohmaensis | Ohta | image |
| Polysiphonia olneyi | Harvey | Ner. bor.-amer. | 2: 40, pl. XVII.B | 1853 |
| Polysiphonia opaca | (C. Agardh) G.G. Moris & G. De Notaris | image |
| Polysiphonia opaca f. adscendens | (Bonnemaison) J. Agardh | image |
| Polysiphonia opaca f. nana | Schiffner | image |
| Polysiphonia opaca f. opaca | J. Agardh | image |
| Polysiphonia opaca f. ramulosa | (C. Agardh) J. Agardh | image |
| Polysiphonia opaca f. simplicior | J. Agardh | image |
| Polysiphonia opaca var. erythrocoma | (Kützing) Schiffner | image |
| Polysiphonia opaca var. fasciculata | (Kützing) Schiffner | image |
| Polysiphonia opaca var. intricata | (Agardh) Zanardini | image |
| Polysiphonia opaca var. intricata | Zanardini | image |
| Polysiphonia opaca var. macrocephala | (Zanardini) Schiffner | image |
| Polysiphonia opaca var. ophiocarpa | (Kützing) Ardissone | image |
| Polysiphonia opaca var. ramulosa | (Kützing) Schiffner | image |
| Polysiphonia opaca var. repens | (Kützing) Schiffner | image |
| Polysiphonia opaca var. repens | (Kützing) Schiffner | image |
| Polysiphonia opaca var. spiculifera | (Zanardini) Schiffner | image |
| Polysiphonia opaca var. tripinnata | (J. Agardh) Ardissone | image |
| Polysiphonia opaca var. tripinnata | Ardissone | image |
| Polysiphonia ophiocarpa | Kützing | image |
| Polysiphonia orbigniana | Kützing | image |
| Polysiphonia ornata | J.G. Agardh | image |
| Polysiphonia orthocarpa | J.L.A.K. Rosenvinge | image |
| Polysiphonia pacifica | G.J. Hollenberg | Amer. J. Bot. | 29: 777, figs. 2, 3, 12, 13 | 1942 |
| Polysiphonia pacifica var. delicatula | G.J. Hollenberg | Amer. J. Bot. | 29: 778 | 1942 |
| Polysiphonia pacifica var. determinata | G.J. Hollenberg | Amer. J. Bot. | 29: 778 | 1942 |
| Polysiphonia pacifica var. distans | G.J. Hollenberg | Amer. J. Bot. | 29: 779, fig. 16 | 1942 |
| Polysiphonia pacifica var. disticha | G.J. Hollenberg | Amer. J. Bot. | 29: 778, figs. 4, 17 | 1942 |
| Polysiphonia pacifica var. gracilis | G.J. Hollenberg | Amer. J. Bot. | 29: 778, fig. 11 | 1942 |
| Polysiphonia paniculata | J.P.F.C. Montagne | image |
| Polysiphonia paniculata | Montagne | Ann. Sci. Nat. Bot. II, | 18: 254 | 1842 |
| Polysiphonia pantophloea | F.T. Kützing | image |
| Polysiphonia pappeana | Kützing | image |
| Polysiphonia paradoxa | G.A. Thuret | image |
| Polysiphonia parasitica | (Hudson) Greville | Fl. Edin.: | 293 | 1824 |
| Polysiphonia parasitica f. dendroidea | (Montagne) J. Agardh | Sp. alg. | 2: 931 | 1863 |
| Polysiphonia parasitica f. parasitica | J. Agardh | image |
| Polysiphonia parasitica f. reptans | J. Agardh | image |
| Polysiphonia parasitica f. typica | Kjellman | image |
| Polysiphonia parasitica var. coralloides | Kützing | Tab. Phyc. | 13: 9, pl. 26: figs. d, e | 1863 |
| Polysiphonia parasitica var. coralloides | Kützing | image |
| Polysiphonia parthasarathyi_('parthasarathyae') | Sreenivasa Rao | Proceedings of the Seminar on Sea, Salt and Plants ... Bhavnagar ... 1965: | 174, figs. 17-23, tipped in addendum | 1967 |
| Polysiphonia parvula | (C. Agardh) J.P.F.C. Montagne | image |
| Polysiphonia parvula | G. Zanardini | image |
| Polysiphonia parvula | Suhr | image |
| Polysiphonia parvula | Suhr ex Kützing | Tab. Phycol. | 14: 18, pl. 51: figs. a-c | 1864 |
| Polysiphonia patens | (Dillwyn) Greville | image |
| Polysiphonia patentifurcata | V. Schiffner | Alg. Mar. Exs.: | 308 | 1929 |
| Polysiphonia patersonis | Sonder | image |
| Polysiphonia patula | Kützing | image |
| Polysiphonia pauperula | Kützing | Diagn. u. Bemerk.: | 17 | 1863 |
| Polysiphonia pauperula | Kützing | image |
| Polysiphonia pecten | J.E. Areschoug | image |
| Polysiphonia pecten-veneris_('Pecten | Veneris') Harvey | image |
| Polysiphonia pecten-veneris_('Pecten veneris') | Harvey | image |
| Polysiphonia pectinata | Harvey | image |
| Polysiphonia pectinata | Harvey | image |
| Polysiphonia pectinata | J. Hooker & Harvey | image |
| Polysiphonia pectinella | Harvey | Trans. R. Irish Acad. | 22(Science): 541 | 1855 |
| Polysiphonia pectinella | W.H. Harvey | image |
| Polysiphonia penicillata | (C. Agardh) Sprengel | image |
| Polysiphonia pennata | (C.A. Agardh) J.P.F.C. Montagne | image |
| Polysiphonia pennata var. pumila | (C. Agardh) Zanardini | image |
| Polysiphonia pentamera | Hollenberg | Pacific Sci. | 22: 204, fig. 2D | 1968 |
| Polysiphonia perforans | M. Cormaci, G. Furnari, F. Pizzuto, & D. Serio | Plant Biosystems | 132: 78, figs. 1-9 | 1998 |
| Polysiphonia periclados | (C. Agardh) Endlicher | image |
| Polysiphonia pernacola | N.M. Adams | New Zealand Journal of Botany | 29: 416, fig. 2 | 1991 |
| Polysiphonia perpusilla | J. Agardh | Öfvers. K. [Svenska] Vet.-Akad. Förh. | 4: 16 | 1847 |
| Polysiphonia perreymondii | J.G. Agardh | image |
| Polysiphonia perriniae | Womersley | Austral. J. Bot. | 27: 479, fig. 5E | 1979 |
| Polysiphonia peucedanoides | (Bonnem.) Crouan frat. | image |
| Polysiphonia phleborhiza | Kützing | Phycol. General. | 419 | 1843 |
| Polysiphonia physarthra | (Kützing) Kützing | image |
| Polysiphonia piligera | Zanardini ex. A. De Toni | image |
| Polysiphonia pilosa | (F.L. Naccari) G. Zanardini | image |
| Polysiphonia pilosa var. minor | Bertoloni | Fl. Ital. Cryptog. | 2: 263 | 1867 |
| Polysiphonia pinnulata | Kützing | Phycol. gen.: | 416 | 1843 |
| Polysiphonia pinnulata | Kützing | image |
| Polysiphonia platycarpa | Børgesen | Bull. Misc. Inform. [Kew] | 1934: 23, figs. 15-17 | 1934 |
| Polysiphonia platycarpa | Børgesen | image |
| Polysiphonia platyspira | Kützing | image |
| Polysiphonia plectocarpa | C.W. Schneider in C.W. Schneider & R.B. Searles | Phycologia | 37: 27, figs. 9-16 | 1998 |
| Polysiphonia plumigera | Harvey mscr. | image |
| Polysiphonia plumula | J. Agardh | Alg. Syst. | 4: 99 | 1885 |
| Polysiphonia plumula | J.G. Agardh | image |
| Polysiphonia poko | Hollenberg | Pacific Sci. | 22: 70, fig. 3A | 1968 |
| Polysiphonia poko var. longii | Hollenberg | Pacific Sci. | 22: 72, fig. 22 | 1968 |
| Polysiphonia polycarpa | Kützing | image |
| Polysiphonia polycephala | A. De Toni | image |
| Polysiphonia polychotoma | Kützing | image |
| Polysiphonia polychroma | G. Martens | Proc. Asiat. Soc. Bengal | 1871: 172 | 1871 |
| Polysiphonia polychroma | Martens | image |
| Polysiphonia polymorpha | (L.) Duby | image |
| Polysiphonia polyphora | Kützing | Sp. Alg.: | 837 | 1849 |
| Polysiphonia polyphora | Kützing | image |
| Polysiphonia polyphysa | Kützing | Diagn. u. Bemerk.: | 18 | 1863 |
| Polysiphonia polyphysa | Kützing | image |
| Polysiphonia polyphysa | Kützing | image |
| Polysiphonia polyrhiza | Kützing | image |
| Polysiphonia polyspora | (C.A. Agardh) J.P.F.C. Montagne | image |
| Polysiphonia porphyroides | Kützing | image |
| Polysiphonia porrecta | Segi | image |
| Polysiphonia porrecta | T. Segi | J. Fac. Fish. Pref. Univ. Mie | 1: 260, pl. 14, text-fig. 34 | 1951 |
| Polysiphonia profunda | G.J. Hollenberg | Pacific Sci. | 22: 72, figs. 18, 20 | 1968 |
| Polysiphonia profunda | Hollenberg | image |
| Polysiphonia propagulifera | Womersley | image |
| Polysiphonia prorepens | Harvey | Ner. Austral.: | 50 | 1847 |
| Polysiphonia prostrata | Harvey | Trans. R. Irish Acad. | 22(Science): 540 | 1855 |
| Polysiphonia pseudovillum | Hollenberg | Pac. Sci. | 22: 73, fig. 3C | 1968 |
| Polysiphonia pulchella | De Notaris | image |
| Polysiphonia pulchella | De Notaris | image |
| Polysiphonia pulvinata | (A.W. Roth) K.P.J. Sprengel | image |
| Polysiphonia pulvinata f. parvula | Heydrich | Ber. Deutsch. Bot. Ges. | 10: 481 | 1892 |
| Polysiphonia pulvinata var. carminata | Crouan fr. | image |
| Polysiphonia pulvinata var. pygmaea | (Kützing) Rabenhorst | image |
| Polysiphonia pungens | G.J. Hollenberg | Amer. J. Bot. | 29: 774, text-figs. 1, 10 | 1942 |
| Polysiphonia punicea | Montagne | image |
| Polysiphonia purpurascens | Harvey | image |
| Polysiphonia purpurata | Zanardini ex A. De Toni | image |
| Polysiphonia purpurea | (C.A. Agardh) J.G. Agardh | image |
| Polysiphonia purpurea | A.P. Postels & F.J. Ruprecht | image |
| Polysiphonia purpurea f. elata | J. Agardh | image |
| Polysiphonia purpurea f. innovans | J. Agardh | image |
| Polysiphonia purpurea f. purpurea | J. Agardh | image |
| Polysiphonia purpureocoerulea_('purpureo-coerulea') | Sonder | image |
| Polysiphonia pycnocoma | Kützing | image |
| Polysiphonia pycnophloea | Kützing | image |
| Polysiphonia pygmaea | F.T. Kützing | image |
| Polysiphonia quadrata | Hollenberg | Pacific Sci. | 22: 74, fig. 25 | 1968 |
| Polysiphonia radiata | P. Díaz-Tapia in Díaz-Tapia et al. | Phycologia | 56: 608, figs. 3-26 | 2017 |
| Polysiphonia radicans | (G.G.A. Meneghini) J.G. Agardh | image |
| Polysiphonia raineriana_('ranieriana') | (Zanardini) Zanardini | image |
| Polysiphonia ramellosa | Kützing | image |
| Polysiphonia ramentacea | Harvey | image |
| Polysiphonia ramulosa | (C.A. Agardh) K.P.J. Sprengel | image |
| Polysiphonia ramulosa | Harvey | image |
| Polysiphonia recurva | (C. Agardh) Sprengel | image |
| Polysiphonia regularis | Kützing | image |
| Polysiphonia regularis | Kützing | image |
| Polysiphonia repens | Kützing | image |
| Polysiphonia repens var. penicillata | Kützing | image |
| Polysiphonia reptabunda | (Suhr) Kützing | Phyc. gen.: | 417 | 1843 |
| Polysiphonia reptabunda | (Suhr) Kützing | image |
| Polysiphonia reptabunda | Suhr ex F.T. Kützing | image |
| Polysiphonia requienii | Montagne ex Kützing | image |
| Polysiphonia rhizoidea | Meñez | Pacific Science | 18: 217, fig. 5 | 1964 |
| Polysiphonia rhizoidea | Meñez | image |
| Polysiphonia rhododactyla | Harvey in Hooker | Fl. Nov.-Zel. | 2: 228 | 1855 |
| Polysiphonia rhodomeloides | Kützing | image |
| Polysiphonia rhunensis | Thuret mscr. | image |
| Polysiphonia richardsonii_('richardsoni') | Hooker | image |
| Polysiphonia rigens | (C.A. Agardh) G. Zanardini | image |
| Polysiphonia rigens | P.K.A. Schousboe | image |
| Polysiphonia rigidula | (Bonnem.) Crouan frat. | image |
| Polysiphonia rigidula | Kützing | Bot. Zeit. | 5: 4 | 1847 |
| Polysiphonia rigidula | Kützing | image |
| Polysiphonia rigidula | P. Crouan & H. Crouan | Alg. Mar. Finistère | no. 313 | 1852 |
| Polysiphonia robusta | F.T. Kützing | image |
| Polysiphonia roeana | Harvey | Trans. R. Irish Acad. | 22(Science): 540 | 1855 |
| Polysiphonia rosea | Greville | image |
| Polysiphonia roseola | (C. Agardh) Fries | image |
| Polysiphonia rostrata | Sonder | Bot. Zeit. | 3: 53 | 1845 |
| Polysiphonia rubrorhiza | G.J. Hollenberg | Pacific Sci. | 22: 74, figs. 4A, 4B, 32 | 1968 |
| Polysiphonia rubrorhiza | Hollenberg | image |
| Polysiphonia ruchingeri | (C.A. Agardh) G. Zanardini | image |
| Polysiphonia ruchingeri var. firmior | (C. Agardh) Zanardini | image |
| Polysiphonia ruchingeri var. firmior | Zanardini | image |
| Polysiphonia rudis | J. Hooker & Harvey | image |
| Polysiphonia rufolanosa | Harvey | Trans. R. Irish Acad. | 22(Science): 540 | 1855 |
| Polysiphonia rugulosa | Kützing | image |
| Polysiphonia rutilans | Kützing | image |
| Polysiphonia rytiphloeoides | J. Hooker & Harvey | image |
| Polysiphonia sabulosa_('sabulosia') | B. Kim & M.S. Kim | Algae | 29: 192, fig. 4 | 2014 |
| Polysiphonia saccorhiza | (Collins & Hervey) Hollenberg | Pacific Sci. | 22: 76 | 1968 |
| Polysiphonia sadoensis | Noda | image |
| Polysiphonia sadoensis | Noda | image |
| Polysiphonia sanctipetri_('sancti-petri') | Collins | image |
| Polysiphonia sanguinea | (C.A. Agardh) G. Zanardini | image |
| Polysiphonia sanguinea var. intermedia | Schiffner | image |
| Polysiphonia sanguinea var. megarthra | (Zanardini) Schiffner | image |
| Polysiphonia savatieri | Hariot | Mém. Soc. Natl. Sci. Nat. Math. Cherbourg | 27: 226 | 1891 |
| Polysiphonia saxicola | G. Zanardini | image |
| Polysiphonia schneideri | B. Stuercke & D.W. Freshwater | Bot. Mar. | 53: 302, figs. 1-11 | 2010 |
| Polysiphonia schousboei | Thuret in Bornet & Thuret | Notes alg.: | 62, pl. XXI | 1876 |
| Polysiphonia schuebeleri_('Schübelerii') | Foslie | image |
| Polysiphonia scoparia | Kützing | image |
| Polysiphonia scopulorum | Harvey | Trans. R. Irish Acad. | 22(Science): 540 | 1855 |
| Polysiphonia scopulorum var. longinodium | S.D. Xiang | Journal of ZheJiang University (Science Edition) | 31: 91, fig. 2 | 2004 |
| Polysiphonia scopulorum var. macrotrichia | Hollenberg | image |
| Polysiphonia scopulorum var. minima | Hollenberg | image |
| Polysiphonia scopulorum var. villum | (J. Agardh) Hollenberg | Pacific Sci. | 22: 81, 83 | 1968 |
| Polysiphonia scopulorum var. villum | (J.G. Agardh) G.J. Hollenberg | image |
| Polysiphonia scopulorum | W.H. Harvey | image |
| Polysiphonia scopulorum | W.H. Harvey | image |
| Polysiphonia secunda | (C. Agardh) Zanardini | Bibliot. Ital. [Milano] | 99: 203 | 1840 |
| Polysiphonia secunda | (C.A. Agardh) G. Zanardini | image |
| Polysiphonia secunda var. adunca | (C. Agardh) Zanardini | image |
| Polysiphonia secunda var. adunca | Zanardini | image |
| Polysiphonia secunda var. rubescens | Dufour | image |
| Polysiphonia secundata | (Suhr) Kützing | image |
| Polysiphonia senticosa | (Suhr) Kützing | image |
| Polysiphonia senticulosa | W.H. Harvey | image |
| Polysiphonia senticulosa | W.H. Harvey | image |
| Polysiphonia sentosa | Kützing | image |
| Polysiphonia sericea | Hauck | image |
| Polysiphonia serpens | (Dufour) De Notaris ex Ardissone | image |
| Polysiphonia serpens | De Notaris, herb. | image |
| Polysiphonia sertularioides | (Grateloup) J. Agardh | Sp. Alg. | 2: 969 | 1863 |
| Polysiphonia sertularioides | (J.P.A.S. Grateloup) J.G. Agardh | image |
| Polysiphonia sertularioides var. tenerrima | (Kützing) Hauck | image |
| Polysiphonia setacea | G.J. Hollenberg | Pacific Sci. | 22: 85, fig. 5A-C | 1968 |
| Polysiphonia setacea | Hollenberg ms. | image |
| Polysiphonia setigera | Kützing | image |
| Polysiphonia setigera | Kützing | image |
| Polysiphonia shepherdii | Womersley | image |
| Polysiphonia siamensis | V. Martens | image |
| Polysiphonia simplex | G.J. Hollenberg | Amer. J. Bot. | 29: 782, fig. 18 | 1942 |
| Polysiphonia simplicifilum | J. Agardh | image |
| Polysiphonia simpliciuscula | Crouan | image |
| Polysiphonia simpliciuscula | Crouan frat. | image |
| Polysiphonia simpliciuscula | P. Crouan & H. Crouan | Alg. Mar. Finistère: | no. 302 | 1852 |
| Polysiphonia simulans | W.H. Harvey | image |
| Polysiphonia sinicola | Setchell & Gardner | image |
| Polysiphonia sinicola | Setchell & N.L. Gardner | Proc. Calif. Acad. Sci., ser. 4, | 12: 769 | 1924 |
| Polysiphonia siretokoensis | Yamada | image |
| Polysiphonia snyderae | Kylin | Lunds Univ. A\*orsskr., N.F., Avd. 2, | 37{2}: 35, pl. 12: fig. 34 | 1941 |
| Polysiphonia snyderae var. heteromorpha | G.J. Hollenberg | Amer. J. Bot. | 29: 784, fig. 15 | 1942 |
| Polysiphonia snyderae var. intricata | G.J. Hollenberg | Amer. J. Bot. | 29: 785 | 1942 |
| Polysiphonia snyderae var. intricata | Hollenberg | image |
| Polysiphonia solieri_('Solierii') | J. Agardh | image |
| Polysiphonia sonorensis | G.J. Hollenberg | Amer. J. Bot. | 29: 779, text-figs. 5, 20 | 1942 |
| Polysiphonia sonorensis | Hollenberg | image |
| Polysiphonia sparsa | (Setchell) Hollenberg | image |
| Polysiphonia sphacelarioides | J. Agardh | image |
| Polysiphonia sphaerocarpa | Børgesen | Dansk Bot. Ark. | 3: 271, figs. 267-271 | 1918 |
| Polysiphonia sphaerocarpa | F.C.E. Børgesen | image |
| Polysiphonia sphaerocarpa var. cheloniae | Hollenberg & J.N. Norris | Smithsonian Contrib. Bot. | 1: 16, figs. 4A-C, 6A | 1977 |
| Polysiphonia sphaerocarpa var. distans | Hollenberg | image |
| Polysiphonia sphaerocarpa var. filifera | Hollenberg | image |
| Polysiphonia sphaerospora | Børgesen | Dansk Bot. Ark. | 3: 272, expl. fig. 267 | 1918 |
| Polysiphonia sphaerospora | Børgesen | image |
| Polysiphonia spiculifera | Zanardini | image |
| Polysiphonia spinella | (Agardh) Kützing | image |
| Polysiphonia spinella | (C. Agardh) J. Agardh | image |
| Polysiphonia spinescens | Montagne | Ann. Sci. Nat. Bot. | ser. 3, 14: 289 | 1850 |
| Polysiphonia spinifera | Kützing | Phycol. General.: | 416 | 1843 |
| Polysiphonia spinifera | Kützing | image |
| Polysiphonia spinosa | (C.A. Agardh) J.G. Agardh | image |
| Polysiphonia spinosa f. genuina | Schiffner | image |
| Polysiphonia spinosa f. lubrica | (C. Agardh) J. Agardh | image |
| Polysiphonia spinosa f. robusta | Schiffner | image |
| Polysiphonia spinosa var. pilosa | (Naccari) Schiffner | image |
| Polysiphonia spinosissima | Harvey in Hooker | Fl. Tasman. | 2: 301 | 1859 |
| Polysiphonia spinulifera | Reinsch | image |
| Polysiphonia spinuligera | Zanardini | image |
| Polysiphonia spinulosa f. major | J. Agardh | image |
| Polysiphonia spinulosa f. minor | J. Agardh | image |
| Polysiphonia spinulosa f. prolifera | J. Agardh | image |
| Polysiphonia spinulosa | R.K. Greville | image |
| Polysiphonia spiralis | L. Batten | image |
| Polysiphonia squarrosa | Kützing | image |
| Polysiphonia stangeri | J. Agardh | Sp. Alg. | 2: 937 | 1863 |
| Polysiphonia stenocarpa | Kützing | image |
| Polysiphonia stenocarpa var. minor | Kützing | image |
| Polysiphonia stichidiosa | G. Funk | Pubbl. Staz. Zool. Napoli | 25(suppl.): 138, pl. XXIV: 4-8 | 1955 |
| Polysiphonia stictophlaea | Kützing | image |
| Polysiphonia stimpsonii | Harvey | Proc. Amer. Acad. Arts & Sci. | 4: 330 | 1860 |
| Polysiphonia stimpsonii | W.H. Harvey | image |
| Polysiphonia stricta | (L.W. Dillwyn) R.K. Greville | image |
| Polysiphonia stricta | (Mertens ex Dillwyn) Greville | Fl. Edin.: | 309 | 1824 |
| Polysiphonia stricta var. gracilis | Kützing | image |
| Polysiphonia strictioides | (Lyngbye) Derb. & Sol. | image |
| Polysiphonia strictissima | J. Hooker & Harvey | London J. Bot. | 4: 538 | 1845 |
| Polysiphonia stuposa | G. Zanardini | image |
| Polysiphonia subadunca f. intricata | (C. Agardh) Hauck | image |
| Polysiphonia subadunca | Kützing | Phycol. General.: | 418 | 1843 |
| Polysiphonia subadunca | Kützing | image |
| Polysiphonia subadunca var. major | Zeller | Journal of the Asiatic Society of Bengal | 42, Part 2: 193 | 1873 |
| Polysiphonia subcontinua | (Agardh) Kützing | image |
| Polysiphonia subcontinua | (C. Agardh) J. Agardh | image |
| Polysiphonia subcontinua var. flocculosa | (Kützing) Ardissone | image |
| Polysiphonia subcontorta | C.H. Peck | image |
| Polysiphonia subcontorta | C.H. Peck | image |
| Polysiphonia subtilis | Ardissone | image |
| Polysiphonia subtilis | De Notaris | image |
| Polysiphonia subtilis | De Notaris | image |
| Polysiphonia subtilis | De Notaris | image |
| Polysiphonia subtilis | Kützing | image |
| Polysiphonia subtilissima | J.P.F.C. Montagne | image |
| Polysiphonia subtilissima | Montagne | Ann. Sci. Nat. Bot., ser. 2, | 13: 199 | 1840 |
| Polysiphonia subtilissima var. abbottiae_('abbottae') | Hollenberg | image |
| Polysiphonia subtilissima var. westpointensis | Harvey | image |
| Polysiphonia subulata | (Ducluzeau) Kützing | image |
| Polysiphonia subulata | (J.A.P. Ducluzeau) J.G. Agardh | image |
| Polysiphonia subulata | (J.A.P. Ducluzeau) P.L. Crouan & H.M. Crouan | image |
| Polysiphonia subulata f. griffithiana | (Harvey) J. Agardh | image |
| Polysiphonia subulata f. montagnei | (De Notaris) J. Agardh | image |
| Polysiphonia subulata f. perreymondii | (J. Agardh) J. Agardh | image |
| Polysiphonia subulata f. purpurea | (C. Agardh) Bornet | image |
| Polysiphonia subulata | J. Agardh f. vestita Rodríguez y Femenías | image |
| Polysiphonia subulifera | (C.A. Agardh) W.H. Harvey | image |
| Polysiphonia subulifera var. polyrhiza | Shperk | image |
| Polysiphonia subulifera var. templetonii_('templetoni') | Harvey | image |
| Polysiphonia succulenta | Harvey in Hooker | Fl. Tasman. | 2: 300 | 1859 |
| Polysiphonia sukatarii | P. Díaz-Tapia, I. Tuney & E. Tas\*,kin | Phycologia | 61: 267, figs. 2-10 | 2022 |
| Polysiphonia sulcata | Rudolphi | image |
| Polysiphonia sulivaniae_('sulivanae') | J. Hooker & Harvey | image |
| Polysiphonia tapinocarpa | Suringar | Annales Musei Botanici Lugduno-Batavi | 3: 259 | 1867 |
| Polysiphonia tasmanica | (Sonder) J. Agardh | image |
| Polysiphonia taylorii_('Taylori') | Hollenberg ex Williams nom. subnud. | image |
| Polysiphonia teges | Womersley | Austral. J. Bot. | 27: 494, fig. 10A-C | 1979 |
| Polysiphonia tenebrosa | Harvey | Ner. Austral.: | 55 | 1847 |
| Polysiphonia tenella | (C. Agardh) J. Agardh | image |
| Polysiphonia tenella | (C. Agardh) Moris & De Notaris | Mem. Reale Accad. Sci. Torino, ser. 2, | 2(Cl): 265 | 1839 |
| Polysiphonia tenera | Harvey | image |
| Polysiphonia tenerrima | Kützing | Phycol. General.: | 417 | 1843 |
| Polysiphonia tenuis | (C. Agardh) Fries | image |
| Polysiphonia tenuis | Hollenberg | image |
| Polysiphonia tenuissima | De Notaris | image |
| Polysiphonia tenuistriata | Hook. f. & Harvey | image |
| Polysiphonia tepida | Hollenberg | Bull. Torrey Bot. Club | 85: 65, fig. 1 | 1958 |
| Polysiphonia teradomariensis | M. Noda in M. Noda & T. Kitami | Sci. Rep. Niigata Univ., Biol. | 8: 47, fig. 15, pl. 3:3 | 1971 |
| Polysiphonia thuyoides | Harvey | image |
| Polysiphonia thwaitesii | Harvey | image |
| Polysiphonia thwaitesii | Harvey | image |
| Polysiphonia thwaitesii | Harvey | image |
| Polysiphonia thwaitesii | Harvey ex J. Agardh | Sp. Alg. | 2: 955 | 1863 |
| Polysiphonia thyrsigera | J. Agardh | image |
| Polysiphonia tinctoria | De Notaris | image |
| Polysiphonia tinctoria | Zanardini | image |
| Polysiphonia tokidae | Segi | image |
| Polysiphonia tommasiniana | Bertoloni | Fl. Ital. Cryptog. | 2: 271 | 1867 |
| Polysiphonia tongatensis | Harvey | image |
| Polysiphonia tongatensis | Harvey ex Kützing | Tab. Phycol. | 14: 14, pl. 41: figs. a-d | 1864 |
| Polysiphonia tongatensis var. corallicola | (Grunow) Grunow | image |
| Polysiphonia tongatensis var. corallicola | Grunow | image |
| Polysiphonia tongatensis var. upolensis | Grunow | image |
| Polysiphonia tongatensis var. upolensis | Grunow | image |
| Polysiphonia tongatensis | W.H. Harvey ex F.T. Kützing | image |
| Polysiphonia torva | De Notaris | image |
| Polysiphonia trichoclada | Kützing | image |
| Polysiphonia trichodes | Kützing | image |
| Polysiphonia tripinnata | J. Agardh | image |
| Polysiphonia triton | P.C. Silva | image |
| Polysiphonia tsudana | Hollenberg | Pacific Sci. | 22: 205, figs. 1F,G, 2C | 1968 |
| Polysiphonia tuberosa | Hollenberg | image |
| Polysiphonia turgidula | Crouan frat. | image |
| Polysiphonia tuticorinensis | Børgesen | J. Indian Bot. Soc. | 17: 235, figs. 12, 13, pl. VIII | 1938 |
| Polysiphonia tuticorinensis | Børgesen | image |
| Polysiphonia ulex | Derbes & Solier | image |
| Polysiphonia ulleungensis | D.E. Bustamante, B.Y. Won & T.O. Cho | Algae | 29: 112, 2 figs. | 2014 |
| Polysiphonia umbellifera | F.T. Kützing | image |
| Polysiphonia uncinata | (Bonnem.) Crouan frat. | image |
| Polysiphonia uncinata | Kützing | image |
| Polysiphonia uncinata var. intricata | (C. Agardh) Kützing | image |
| Polysiphonia unguiformis | Børgesen | J. Indian Bot. Soc. | 16: 53, figs. 29-33 | 1937 |
| Polysiphonia unguiformis | Børgesen | image |
| Polysiphonia upolensis | Grunow | J. Mus. Godeffroy [Hamburg] | 3: 49 | 1874 |
| Polysiphonia urbana | Harvey | Ner. Austral.: | 55 | 1847 |
| Polysiphonia urbanoides | Levring | image |
| Polysiphonia urceolata | (L.W. Dillwyn) R.K. Greville | image |
| Polysiphonia urceolata f. comosa | (C. Agardh) J. Agardh | image |
| Polysiphonia urceolata f. formosa | (Suhr) J. Agardh | image |
| Polysiphonia urceolata f. lepadicola | (Lyngbye) Segi | J. Fac. Fish. Pref. Univ. Mie | 1: 242 | 1951 |
| Polysiphonia urceolata f. patens | (Dillwyn) J. Agardh | image |
| Polysiphonia urceolata f. roseola | (C. Agardh) J. Agardh | image |
| Polysiphonia urceolata f. typica | Kjellman | image |
| Polysiphonia urceolata f. urceolata | J. Agardh | image |
| Polysiphonia urceolata subf. distans | Foslie | image |
| Polysiphonia urceolata subf. fasciculata | Foslie | image |
| Polysiphonia urceolata var. formosa [(Suhr) | Farlow] | image |
| Polysiphonia urceolata var. patens | (Dillwyn) Harvey | image |
| Polysiphonia urceolata var. senticulosa | (Harvey) Collins | image |
| Polysiphonia utricularis | Zanardini | Flora | 34: 34, no fig. | 1851 |
| Polysiphonia vaga | (Kützing) Kützing | image |
| Polysiphonia vaga | Kützing | image |
| Polysiphonia vagabunda | Harvey in Hooker | Fl. Tasman. | 2: 300 | 1859 |
| Polysiphonia valida | J. Agardh | Anal. Cont. | 32{2}: 110 | 1896 |
| Polysiphonia variabilis | Harvey | image |
| Polysiphonia variabilis | Harvey | image |
| Polysiphonia variabilis | Hooker & Harvey | image |
| Polysiphonia variabilis var. longiarticulata | Harvey | image |
| Polysiphonia variegata | (C. Agardh) Zanardini | Bibliot. Ital. [Milano] | 99: 202 | 1840 |
| Polysiphonia variegata | (C.A. Agardh) G. Zanardini | image |
| Polysiphonia variegata f. major | Schiffner | image |
| Polysiphonia variegata f. minor | Schiffner | image |
| Polysiphonia variegata var. arctica | (J. Agardh) Gobi | image |
| Polysiphonia variegata var. fragilis | (Sperk) Voronikhin | image |
| Polysiphonia variegata var. fragilis | Woronichin | Trudy Imp. S. Peterburgsk. Obshch. Estestvoisp., Otd. Bot. | 40: 244 | 1909 |
| Polysiphonia variegata var. genuina | Schiffner | image |
| Polysiphonia variegata var. leptura | (Kützing) Schiffner | image |
| Polysiphonia variegata var. radicana | Zanardini | image |
| Polysiphonia variegata var. radicans | (C. Agardh) Zanardini | image |
| Polysiphonia veneta | G. Zanardini | image |
| Polysiphonia versicolor | J. Hooker & Harvey | image |
| Polysiphonia verticillata | Harvey in Hooker & Arnott, | Bot. Beechey's Voy. | 165 | 1833 |
| Polysiphonia vestita | J. Agardh | image |
| Polysiphonia victoriae | (J. Agardh) Harvey | image |
| Polysiphonia victoriae | Harvey mscr. | image |
| Polysiphonia vidovichii | Meneghini ex Kützing | image |
| Polysiphonia villifera | (C. Agardh) Endlicher | image |
| Polysiphonia villum | J. Agardh | Sp. Alg. | 2: 941 | 1863 |
| Polysiphonia villum | J.G. Agardh | image |
| Polysiphonia vinosa | F.T. Kützing | image |
| Polysiphonia violacea | (A.W. Roth) K.P.J. Sprengel | image |
| Polysiphonia violacea | (Roth) Sprengel | Syst. Veg. | 4{1}: 348 | 1827 |
| Polysiphonia violacea f. aculeata | (C. Agardh) Rosenvinge | image |
| Polysiphonia violacea f. allochroa | (Roth) J. Agardh | image |
| Polysiphonia violacea f. allochrous_('allochroa') | (Roth) J. Agardh | Sp. Alg. | 2: 988 | 1863 |
| Polysiphonia violacea f. fibrillosa | (Dillwyn) Rosenvinge | image |
| Polysiphonia violacea f. robusta | J. Agardh | image |
| Polysiphonia violacea f. tenuior_('tenuis') | (Roth) Rosenvinge | Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. & Math. Afd., Ser. 7, | 7: 422 | 1924 |
| Polysiphonia violacea f. tenuis | (Roth) Rosenvinge | image |
| Polysiphonia violacea f. violacea | J. Agardh | image |
| Polysiphonia violacea var. amethystea | (Kützing) Kützing | image |
| Polysiphonia violacea var. bulbosa | Areschoug | image |
| Polysiphonia violacea var. fibrillosa | (C. Agardh) Areschoug | Nova Acta Reg. Soc. Sci. Upsal. | 13: 274 | 1847 |
| Polysiphonia violacea var. fibrillosa | (Dillwyn) Areschoug | image |
| Polysiphonia violacea var. flexicaulis | Harvey | Ner. bor.-amer. | 2: 44 | 1853 |
| Polysiphonia violacea var. genuina | Hauck | image |
| Polysiphonia violacea var. griffithsiana | (Harvey) L. Batten | image |
| Polysiphonia violacea var. myriotricha | Kützing | image |
| Polysiphonia violacea var. subbrodiaei_('sub-brodiaei') | Areschoug | image |
| Polysiphonia violacea var. subulata | (Ducluzeau) Hauck | image |
| Polysiphonia violacea var. tenuis | Greville | image |
| Polysiphonia violacea var. tenuissima | Areschoug | image |
| Polysiphonia violacea var. violacea | Areschoug | image |
| Polysiphonia violascens | Kützing | image |
| Polysiphonia violascens var. strictiuscula | Kützing | image |
| Polysiphonia virens | Kützing | image |
| Polysiphonia virens var. major | Kützing | image |
| Polysiphonia virgata | (C. Agardh) Sprengel | Caroli Linnaei ... Systema vegetabilium. Editio decima sexta. Voluminis IV. Pars I. Classis 24: | 350 | 1827 |
| Polysiphonia vulpina | De Notaris | image |
| Polysiphonia vulpina | De Notaris herb. | image |
| Polysiphonia woodii | Harvey | Ner. bor.-amer. | 2: 52 | 1853 |
| Polysiphonia woodii | W.H. Harvey | image |
| Polysiphonia wulfenii var. forcipata | Kützing | image |
| Polysiphonia wulfenii var. fruticulosa | (Wulfen) Rabenhorst | image |
| Polysiphonia wulfenii_('Wulfeni') | (Roth) J. Agardh | image |
| Polysiphonia wulfenii_('Wulfeni') | Kützing | image |
| Polysiphonia yendoi | Segi | image |
| Polysiphonia yendoi | T. Segi | J. Fac. Fish. Pref. Univ. Mie | 1: 211, fig. 15, pl. 6:1, 2 | 1951 |
| Polysiphonia yokoskensis | Hariot | image |
| Polysiphonia yonakuniensis | Segi | image |
| Polysiphonia zanardinii | Schiffner | image |
| Polysiphonia zimmermannii_('Zimmermanni') | Suhr mscr. | image |
| Polysiphonia zostericola | Lucas | image |