| Name | Author | Source | Citation | Year |
|---|
| Chrysosphaera nitellae | (Geitler) Bourrelly | image |
| CIRCONITELLA | Joan Watson | image |
| Circonitella knowltoni | (Seward) Joan Watson | image |
| Coleochaete irregularis var. nitellarum | (L. Jost) E.C. Teodoresco | image |
| Coleochaete nitellarum | Jost | Ber. Deutsch. Bot. Ges. | 13: 434, pl. 34: figs. 1-8, 12, 13, 16, 17 | 1895 |
| CRINITELLA | M.B. Gnilovskaya | image |
| Crinitella radiata | Gnilovskaya | image |
| Drewiana nitella | (Harvey) E. Gordon | Austral. J. Bot., Suppl. Ser. | 4: 101 | 1972 |
| Drewiana nitella | (Harvey) Gordon | image |
| Epichrysis nitellae | Geitler | image |
| EUNITELLA | A.K.H. Braun | image |
| EUNITELLA | A.K.H. Braun | image |
| Monas nitellarum | (Cienkowski) W.S. Kent | image |
| NITELLA | (C. Agardh) Hooker | image |
| NITELLA | (C. Agardh) T. Lestiboudois | image |
| NITELLA | C. Agardh | image |
| NITELLA | R.D. Wood | image |
| NITELLA | | image |
| NITELLA | | image |
| NITELLA | | image |
| NITELLA | | image |
| NITELLA | | image |
| NITELLA | | image |
| NITELLA | | image |
| NITELLA | | image |
| NITELLA | | image |
| Nitella abyssinica | Braun | image |
| Nitella acanthospora | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 324, fig. 1 | 2023 |
| Nitella acuminata | Braun | image |
| Nitella acuminata | Braun ex Wallman | image |
| Nitella acuminata f. brachyteles | Nordstedt | image |
| Nitella acuminata f. brachyteles | T.F. Allen | image |
| Nitella acuminata f. capitulifera | (T.F. Allen) R.D. Wood | image |
| Nitella acuminata f. subspicata | (T.F. Allen) R.D. Wood | image |
| Nitella acuminata var. bellangeri | Braun | image |
| Nitella acuminata var. bellangeri | Braun ex Wallman | image |
| Nitella acuminata var. capitulifera | (T.F. Allen) Imahori | image |
| Nitella acuminata var. gollmeriana | (A. Braun) R.D. Wood | image |
| Nitella acuminata var. lindheimeri | Braun | image |
| Nitella acuminata var. mauritiana | Braun | image |
| Nitella acuminata var. subglomerata | (Braun) T.F. Allen | image |
| Nitella acuta | C. Agardh ined. | image |
| Nitella aemula | A. Braun | image |
| Nitella aemula | Brown | image |
| Nitella africana | (A. Braun) Kützing | image |
| Nitella allenii f. inokasiraensis | R.D. Wood | image |
| Nitella allenii f. mikawaënsis | R.D. Wood | image |
| Nitella allenii | Imahori | image |
| Nitella allenii | J. Groves | image |
| Nitella alleninda | Zaneveld | image |
| Nitella americana | R.W. Scribailo & M.S. Alix | Charophytes | 2(1): 40, no fig. | 2010 |
| Nitella annamalaiensis | D. Subramanian | Phykos | 39: 36, pl. 2 | 2001 |
| Nitella annandalei | B.P. Pal | image |
| Nitella annularis | T.F. Allen | Characeae Amer. 2: | 16, pl. | 1894 |
| Nitella anomala | Wallman | image |
| Nitella antarctica | Braun | image |
| Nitella arechavaletae | Spegazzini | image |
| Nitella arechavaletae | Spegazzini | image |
| Nitella arthroglochin | (A. Braun) M.T. Casanova in Casanova et al. | Charophytes | 1: 13 | 2007 |
| Nitella asagrayana | Schaffner ex Nordstedt | image |
| Nitella atrovirens | Wallman | image |
| Nitella australiensis | J.C. van Raam | Beih. Nova Hedwigia | 110: 28 | 1995 |
| Nitella australis | (Brown) Kützing | image |
| Nitella axillaris | A. Braun | image |
| Nitella axilliformis | Imahori | image |
| Nitella axilliformis var. polymorpha | Han | image |
| Nitella axillocarpa | Groves & Stephens | image |
| Nitella barbata | (Meyen) Rabenhorst | image |
| Nitella baronii_('Baroni') | H. Groves & J. Groves | image |
| Nitella bastinii | T.F. Allen | Characeae Americanae Exsicc.: | 42 | 1894 |
| Nitella bastinii_('bastini') | T.F. Allen | Characeae Amer. 2: | 10, pl. | 1894 |
| Nitella batrachosperma | (Thuill.) C. Agardh | image |
| Nitella batrachosperma | A. Braun ex Kützing | image |
| Nitella batrachosperma | A. Braun ex Kützing | Sp. Alg.: | 515 | 1849 |
| Nitella batrachosperma | Braun | image |
| Nitella batrachosperma | C. Agardh | Syst.: | 126 | 1824 |
| Nitella batrachosperma f. fallax | Migula | Characeen Deutschland ...: | 190, fig. 54g | 1890 |
| Nitella batrachosperma f. maxima | Migula | Characeen Deutschland ...: | 189 | 1890 |
| Nitella batrachosperma f. minor | Migula | Characeen Deutschland ...: | 190, fig. 53 | 1890 |
| Nitella bejerensis | Norman ad int. | image |
| Nitella belangeri | (Braun) Braun | image |
| Nitella bengalensis | Kundu | image |
| Nitella bengalica | Wallman | image |
| Nitella bertolonii | Kützing | image |
| Nitella bicornuta | Han & W.Q. Chen | image |
| Nitella biformis | Braun | image |
| Nitella bipartita | Filarszky | image |
| Nitella blankinshipii | T.F. Allen | Characeae Amer. 2: | 5, pl. | 1892 |
| Nitella blowiana | J. Groves | image |
| Nitella bonaërensis | Spegazzini | image |
| Nitella boreali-australis | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 329, fig. 4 | 2023 |
| Nitella borealis | F.S. Han & W.Q. Chen in han, Tuan & Chen | Acta Phytotaxonomica Sinica | 16{3}: 89, fig. 1:1-5 (as pl. I: figs. 1-5 in L) | 1978 |
| Nitella borealis | Han & Chen | image |
| Nitella borealis | Wallman | image |
| Nitella borreri | (Babington) Wallman | image |
| Nitella brachyteles | Braun | image |
| Nitella brachyteles f. elongata | Filarszky | image |
| Nitella brasiliensis | A. Braun | image |
| Nitella braunii | (Gmelin) Rabenhorst | image |
| Nitella braunii subsp. africana | (Braun) Wallman | image |
| Nitella braunii | Wallman | image |
| Nitella brevidactyla | Han & W.Q. Chen | image |
| Nitella brevidactyla var. hainanensis | Y.J. Li | Acta Phytotax. Sin. | 23: 155, fig. 3 | 1985 |
| Nitella brongniartiana | (Weddell) Cosson & Germain de Saint-Pierre | Atlas Fl. Paris: | pl. XL: C | 1845 |
| Nitella burmanica | B.P. Pal | image |
| Nitella byssoides | Braun | image |
| Nitella caespitosa | Jao & Y.Y. Lee | image |
| Nitella californica f. nidifica | T.F. Allen | image |
| Nitella californica | T.F. Allen | image |
| Nitella capillaris f. syncarpa | (Thuill.) R.D. Wood | image |
| Nitella capillaris | Wallman | image |
| Nitella capillata | Braun | image |
| Nitella capitata | (Nees) C. Agardh | image |
| Nitella capitata var. americana | Chaudhary | image |
| Nitella capitata var. americana | Sinha & Chaudhary | image |
| Nitella capitulifera | T.F. Allen | image |
| Nitella cernua | A. Braun | image |
| Nitella charoides | D. Subramanian | in Keshri & Kargupta, eds., Glimpses of Indian Phycology: | 62, pl. 1 | 2005 |
| Nitella chevalieri | Hy | Bull. Herb. Boissier | 1 (appendix 1): 21 | 1893 |
| Nitella chilensis | A. Braun | image |
| Nitella clarkii | J. Groves | image |
| Nitella clavata f. dilatata | (T.F. Allen) R.D. Wood | Taxon | 11: 16 | 1962 |
| Nitella clavata f. typica | Spegazzini | image |
| Nitella clavata | Kützing | image |
| Nitella clavata var. laguroides | Spegazzini | image |
| Nitella clavatoides | Guerlesquin | image |
| Nitella claytonii | M.T. Casanova in Casanova et al. | Charophytes | 1: 8, figs. 2a-j | 2007 |
| Nitella comptonii | J. Groves | image |
| Nitella condensata | (Ruprecht) Kützing | image |
| Nitella confervacea | A. Braun | image |
| Nitella confervacea subsp. brebissonii_('Brebissoni') | Hy | Bull. Soc. Bot. France | 52: 93 | 1905 |
| Nitella confervacea subsp. nordstedtii | Hy | Bull. Soc. Bot. France | 52: 93 | 1905 |
| Nitella confervacea subsp. simonii | Hy | Bull. Soc. Bot. France | 61: 239 | 1914 |
| Nitella confervacea var. chevalieri | (Hy) Hy | Bull. Soc. Bot. France | 52: 93 | 1905 |
| Nitella confervacea var. hariotii_('Harioti') | Hy | Bull. Soc. Bot. France | 52: 94 | 1905 |
| Nitella confervacea var. neyrautiana | Hy | Mem. Soc. Bot. France | 26: 18 | 1913 |
| Nitella confervacea var. renovii_('Renovi') | Hy | Bull. Soc. Bot. France | 52: 93 | 1905 |
| Nitella conformis | Nordstedt | image |
| Nitella confusa | (R.D. Wood) J.C. van Raam | Beih. Nova Hedwigia | 110: 29 | 1995 |
| Nitella congesta | (Brown) Braun | image |
| Nitella congesta | (R. Brown) A. Braun ex Kützing | Sp. alg.: | 516 | 1849 |
| Nitella congesta | (R. Brown) A. Braun ex Kützing | image |
| Nitella congesta f. subtilissimoides | R.D. Wood | image |
| Nitella conglobata | Braun | image |
| Nitella conifera | Groves & Stephens | image |
| Nitella corallina | (Willd.) C. Agardh | image |
| Nitella cordobensis | Cáceres | image |
| Nitella coreana | Morioka | image |
| Nitella cosinensis | Stache | image |
| Nitella crispa | Imahori | image |
| Nitella cristata | A. Braun Herb. Sonder | image |
| Nitella cristata | Braun | image |
| Nitella cristata var. ambigua | A. Braun Hb. Sonder | image |
| Nitella cristata var. ambigua | Braun | image |
| Nitella cristata var. microcephala | (Nordstedt) R.D. Wood | image |
| Nitella cristata var. microteles | (M.B. Williams) R.D. Wood | image |
| Nitella cristata var. reticulata | (M.B. Williams) R.D. Wood | image |
| Nitella crocodylus | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 333, fig. 6 | 2023 |
| Nitella cuspidata | A. Braun | image |
| Nitella densa | Jao & Y.Y. Lee | image |
| Nitella devestita | Stache | image |
| Nitella dictyosperma | H. Groves & J. Groves | image |
| Nitella diffusa | Braun | image |
| Nitella diffusa | Braun | image |
| Nitella dilatata | T.F. Allen | Characeae Amer. 2: | 13 | 1894 |
| Nitella dimorpha | Migula | image |
| Nitella dispersa | Braun | image |
| Nitella divaricata | Groves & Stephens | image |
| Nitella dixonii | H. Groves & J. Groves | image |
| Nitella doidgeae f. congesta | D. Subramanian | Phykos | 39: 40, pl. 4 | 2001 |
| Nitella doidgeae | Groves & Stephens | image |
| Nitella dolichodactyla | Han & Fu | image |
| Nitella dregeana | A. Braun ex Kützing | image |
| Nitella dregeana | Braun | image |
| Nitella dualis f. blowiana | (J. Groves) R.D. Wood | image |
| Nitella dualis f. obtusa | R.D. Wood | image |
| Nitella dualis f. superba | (Pal) R.D. Wood | image |
| Nitella dualis | Nordstedt | image |
| Nitella dualis var. pulchella | (T.F. Allen) R.D. Wood | image |
| Nitella duthieae f. grovesiana | R.D. Wood | image |
| Nitella duthieae | Groves & Stephens | image |
| Nitella elegans | B.P. Pal | image |
| Nitella elegans | Pal | image |
| Nitella erecta | Imahori | image |
| Nitella euarthra | (A. Braun) Compère | image |
| Nitella exigua | (Rabenhorst) Wallman | image |
| Nitella exilis | (Amici) Braun | image |
| Nitella exilis var. flagelliformis | Braun | image |
| Nitella expansa | T.F. Allen | image |
| Nitella fallosa | Morioka | image |
| Nitella fascicularis | Filarszky & G.O. Allen ex Filarszky | image |
| Nitella fasciculata | (Amici) Braun | image |
| Nitella fasciculata var. prolifera 'Braun' | | image |
| Nitella fasciculata var. robustior | Kützing | image |
| Nitella flabellata | Kützing | image |
| Nitella flagellifera | J. Groves & G.O. Allen | image |
| Nitella flagelliformis | Braun | image |
| Nitella flagelliformis var. conglomerata | Y.J. Li | Acta Phytotax. Sin. | 23: 155, fig. 4 | 1985 |
| Nitella flexilis | (L.) C. Agardh | image |
| Nitella flexilis f. atkahensis | R.D. Wood | image |
| Nitella flexilis f. attenuata | (H. Groves & J. Groves) R.D. Wood | image |
| Nitella flexilis f. brachyphylla | T.F. Allen | image |
| Nitella flexilis f. brevifolia | Wahlstedt | image |
| Nitella flexilis f. colombiana | Mora-Osejo | image |
| Nitella flexilis f. crassa | Wahlstedt | image |
| Nitella flexilis f. elongata | T.F. Allen | image |
| Nitella flexilis f. laxa | Vilhelm | image |
| Nitella flexilis f. longifolia | Wahlstedt | image |
| Nitella flexilis f. mexicana | (T.F. Allen) R.D. Wood | image |
| Nitella flexilis f. obtusa | (T.F. Allen) R.D. Wood | Taxon | 11: 15 | 1962 |
| Nitella flexilis f. opacoides | R.D. Wood | Taxon | 11: 15 | 1962 |
| Nitella flexilis f. paucicostata | (T.F. Allen) R.D. Wood | image |
| Nitella flexilis f. pusilla | Wahlstedt | image |
| Nitella flexilis f. spanioclema | (J. Groves & Bullock-Webster) Raam ex Guiry & D.M. John | Notulae algarum | 196: 1 | 2021 |
| Nitella flexilis f. subcapitata | Leonhardi | image |
| Nitella flexilis f. subcapitata | Wahlstedt | image |
| Nitella flexilis f. subnidifica [T.F. | Allen] | image |
| Nitella flexilis subf. longifolia | Wahlstedt | image |
| Nitella flexilis subsp. elongata | Wahlstedt | image |
| Nitella flexilis var. americana | Choudhary invalid | image |
| Nitella flexilis var. crassa | Braun | image |
| Nitella flexilis var. flabellata | Rabenhorst | image |
| Nitella flexilis var. fryeri | J. Groves & Bullock-Webster | J. Bot. (London) | 57: 102 | 1919 |
| Nitella flexilis var. nidifica | Hartman ex Wallman | image |
| Nitella flexilis var. nigricans | (Wallman) Wahlstedt | image |
| Nitella flexilis var. nigricans | Wallman | image |
| Nitella flexilis var. spanioclema | (J. Groves & Bullock-Webster) R.D. Wood | image |
| Nitella flexilis var. subcapitata | A. Braun | image |
| Nitella flexilis var. tenuis | A. Bauer | image |
| Nitella forestii | Sinha & Chaudhary | image |
| Nitella formosa | T.F. Allen | Characeae Americanae Exsicc.: | 44 | 1894 |
| Nitella fuana_('fuiana') | L.Q. Lan & R.W. Qing in Chen et al. | Plant Systematics and Evolution | 304: 131, figs. 1, 2 | 2017 |
| Nitella furcata | (Roxb.) C. Agardh | image |
| Nitella furcata var. fallosa | (Morioka) Imahori | image |
| Nitella furcata var. roxburghii | (A. Braun) Zaneveld | image |
| Nitella furcata var. sieberi | (A. Braun) R.D. Wood | image |
| Nitella furcata var. zollingeri | (A. Braun) Zaneveld | image |
| Nitella furculata | (Reichenbach) Nordstedt | image |
| Nitella gelatinifera var. afoliata | (R.D. Wood) J.C. van Raam | Beih. Nova Hedwigia | 110: 33 | 1995 |
| Nitella gelatinifera var. microcephala | (A. Braun) J.C. van Raam | Beih. Nova Hedwigia | 110: 33 | 1995 |
| Nitella gelatinosa | (Braun) Braun | image |
| Nitella gelatinosa | (Braun) Braun ex Kützing | image |
| Nitella gelatinosa var. cladostachya | Braun | image |
| Nitella gelatinosa var. cryptostachya | (A. Braun) J.C. van Raam | Beih. Nova Hedwigia | 110: 34 | 1995 |
| Nitella gelatinosa var. cryptostachya | A. Braun | Linnaea | 25: 705 | 1853 |
| Nitella gelatinosa var. cryptostachya | Braun | image |
| Nitella gelatinosa var. gigantea | Halsted | image |
| Nitella gelatinosa var. microcephala | A. Braun | Hooker's J. Bot. | 1: 198 | 1849 |
| Nitella gelatinosa var. microcephala | Braun | image |
| Nitella gelatinosa var. opaca | A. Braun | image |
| Nitella gelatinosa var. podostachya | Braun | image |
| Nitella gelatinosa var. podystachya | Nordstedt | image |
| Nitella gelatinosa var. polycephala | Braun | image |
| Nitella gigantaea | Kasaki | image |
| Nitella glaziovii | Zeller | image |
| Nitella globula_('globulus') | Stache | image |
| Nitella globulifera | B.P. Pal | image |
| Nitella globulifera | Pal | image |
| Nitella gloeostachys | Braun | image |
| Nitella glomerata | (Desvaux) A. Braun | image |
| Nitella glomerata | (Desvaux) A. Braun | image |
| Nitella glomerata | (Desvaux) Cosson & Germain | image |
| Nitella glomerata | Jao & Y.Y. Lee | image |
| Nitella glomerata var. microcephala | Braun | image |
| Nitella glomerulifera | (Ruprecht) Wallman | image |
| Nitella gollmeriana | A. Braun | image |
| Nitella gracilens | Morioka | image |
| Nitella graciliformis | J. Groves | image |
| Nitella gracilis | (J.E. Smith) C. Agardh | Syst.: | 125 | 1824 |
| Nitella gracilis f. aemula | (A. Braun) R.D. Wood | image |
| Nitella gracilis f. africana | (A. Braun) G. Feldmann | image |
| Nitella gracilis f. annularis | (T.F. Allen) R.D. Wood | Taxon | 11: 21 | 1962 |
| Nitella gracilis f. australiensis | Nordstedt | image |
| Nitella gracilis f. brevifolia | Wahlstedt | image |
| Nitella gracilis f. condensata | Wahlstedt | image |
| Nitella gracilis f. conformis | (Nordstedt) R.D. Wood | image |
| Nitella gracilis f. congesta | D. Subramanian | Indian Hydrobiology | 3: 73 | 2000 |
| Nitella gracilis f. delicatula | Subramanian | image |
| Nitella gracilis f. flexuosa | Subramanian | image |
| Nitella gracilis f. globulifera | (Pal) R.D. Wood | image |
| Nitella gracilis f. gracillima | Wahlstedt | image |
| Nitella gracilis f. habrocoma | (J. Groves & Stephens) R.D. Wood | image |
| Nitella gracilis f. heterothalia | D. Subramanian | Indian Hydrobiology | 3: 73, figs. 18, 19 | 2000 |
| Nitella gracilis f. homothalia | D. Subramanian | Indian Hydrobiology | 3: 73, figs. 16, 17 | 2000 |
| Nitella gracilis f. intermedia | (Nordstedt) R.D. Wood | image |
| Nitella gracilis f. laxa | Wahlstedt | image |
| Nitella gracilis f. leibergii | (T.F. Allen) R.D. Wood | Taxon | 11: 20 | 1962 |
| Nitella gracilis f. longifolia | Wahlstedt | image |
| Nitella gracilis f. major | Wahlstedt | image |
| Nitella gracilis f. minispora | (Imahori & Suga) R.D. Wood | image |
| Nitella gracilis f. minor | Wahlstedt | image |
| Nitella gracilis f. moniliformis | (Zaneveld) R.D. Wood | image |
| Nitella gracilis f. morongii | (T.F. Allen) R.D. Wood | image |
| Nitella gracilis f. nana | Subramanian | image |
| Nitella gracilis f. normalis | Leonhardi | image |
| Nitella gracilis f. normalis | Wahlstedt | image |
| Nitella gracilis f. pseudoborealis | Teodoresco | image |
| Nitella gracilis f. pusilla | Wahlstedt | image |
| Nitella gracilis f. robustior | Wahlstedt | image |
| Nitella gracilis f. simplicior | Leonhardi | image |
| Nitella gracilis f. simplicior | Wahlstedt | image |
| Nitella gracilis f. tenella | Wahlstedt | image |
| Nitella gracilis f. tenuior | Wahlstedt | image |
| Nitella gracilis f. zeyheri | (A. Braun ex Kützing) R.D. Wood | image |
| Nitella gracilis subf. condensata | Wahlstedt | image |
| Nitella gracilis subf. laxa | Wahlstedt | image |
| Nitella gracilis subsp. gloeostachys | (A. Braun) R.D. Wood | image |
| Nitella gracilis subsp. gracillima | (T.F. Allen) R.D. Wood | image |
| Nitella gracilis subsp. havaiensis | (Nordstedt) R.D. Wood | image |
| Nitella gracilis subsp. leptosperma | (Nordstedt) R.D. Wood | image |
| Nitella gracilis subsp. minuta | (T.F. Allen) R.D. Wood | Taxon | 11: 20 | 1962 |
| Nitella gracilis var. africana | (Braun) Braun | image |
| Nitella gracilis var. annandalei | (Pal) R.D. Wood | image |
| Nitella gracilis var. asagrayana | (Schaffn. ex Nordstedt) R.D. Wood | image |
| Nitella gracilis var. athanurensis | Subramanian | image |
| Nitella gracilis var. bipartita | (Filarszky) R.D. Wood | image |
| Nitella gracilis var. borealis | A. Braun | Abh. Königl. Akad. Wiss. Berlin, Phys. Kl. | 1882{1}: 60 | 1882 |
| Nitella gracilis var. brachyphylla | Wallman | image |
| Nitella gracilis var. bugellensis | Cesati | image |
| Nitella gracilis var. capensis | (Braun) Braun | image |
| Nitella gracilis var. capitellata | (A. Braun) Choudhary & R.D. Wood | image |
| Nitella gracilis var. confervacea | Brébisson | Flore de la Normandie, ed. 2: | 338 | 1849 |
| Nitella gracilis var. contracta | Rabenhorst | image |
| Nitella gracilis var. elongata | Rabenhorst | image |
| Nitella gracilis var. gracillima | Rabenhorst | image |
| Nitella gracilis var. mathuatae | (T.F. Allen) R.D. Wood | Taxon | 11: 20 | 1962 |
| Nitella gracilis var. nordstedtiana | (H. Groves & J. Groves) R.D. Wood | Taxon | 11: 21 | 1962 |
| Nitella gracilis var. penicillata | (A. Braun) R.D. Wood | image |
| Nitella gracilis var. polyglochin | Leonhardi | image |
| Nitella gracilis var. pseudotenuissima | (Kundu) R.D. Wood | image |
| Nitella gracilis var. robusta | (Imahori) R.D. Rood | image |
| Nitella gracilis var. sathamangalensis | D. Subramanian | Indian Hydrobiology | 3: 72, figs. 16-19 | 2000 |
| Nitella gracilis var. spiciformis | (Morioka) R.D. Wood | image |
| Nitella gracilis var. vieillardii_(`viellardi') | A. Braun | Abh. Königl. Akad. Wiss. Berlin, Phys. Kl. | 1882{1}: 61 | 1882 |
| Nitella gracillima | T.F. Allen | image |
| Nitella gracillima var. robusta | Imahori | image |
| Nitella grandis | A. Braun | image |
| Nitella grovesii | Kundu | image |
| Nitella grovesii | Kundu | image |
| Nitella guangdongensis | Y.J. Li | Acta Phytotax. Sin. | 23: 154, fig. 2 | 1985 |
| Nitella guangxiensis | Y.J. Ling, G.Z. Deng & Z. Li | Acta Hydrobiologica Sinica | 16: 62, fig. 1 | 1992 |
| Nitella guineensis | Kützing | image |
| Nitella gunnii | A. Braun | image |
| Nitella gunnii | A. Braun, illeg. superfl. | image |
| Nitella gunnii var. fastigiata | Braun | image |
| Nitella gunnii var. minuta | Braun | image |
| Nitella gunnii var. penicillata | (Braun) Braun | image |
| Nitella haageniae_('haagenii') | J.C. van Raam | Beih. Nova Hedwigia | 110: 35, fig. 21 | 1995 |
| Nitella habrocoma | Groves & Stephens | image |
| Nitella hanyangensis | Jao & Y.Y. Lee | image |
| Nitella havaiensis | Nordstedt | image |
| Nitella heterodactyla | Filarszky & G.O. Allen | image |
| Nitella heterophylla | (A. Braun) A. Braun ex Kützing | image |
| Nitella heterophylla | (Braun) Braun | image |
| Nitella heteroteles | Groves & Stephens | image |
| Nitella hokouensis | Han & W.Q. Chen | image |
| Nitella hookeri | Braun | image |
| Nitella hookeri | P.F. Reinsch | image |
| Nitella hookeri var. arthroglochin | A. Braun in Nordstedt | Abh. K. Akad. Wiss. Berlin | 1882: 87 | 1882 |
| Nitella hookeri var. attenuata | Nordstedt | image |
| Nitella hookeri var. heteromorpha | Nordstedt | image |
| Nitella hookeri var. masoniae | R.D. Wood | N. Zealand J. Bot. | 15: 159, fig. 42C | 1977 |
| Nitella hookeri var. masoniae_('masonae') | R.D. Wood | image |
| Nitella hookeri var. microcephala | Nordstedt | image |
| Nitella hookeri var. tasmanica | Braun | image |
| Nitella hookeri var. tricellularis | (Nordstedt) R.D. Wood | image |
| Nitella horikawae | Imahori | image |
| Nitella hotchkissii | Tindall | J. Phycol. | 3: 229, figs. 1, 2. | 1968 |
| Nitella huillensis | Braun & Welwitsch | image |
| Nitella hupehensis | Jao & Y.Y. Lee | image |
| Nitella hyalina | (DC.) C. Agardh | image |
| Nitella hyalina f. brachyactis | (A. Braun) G. Feldmann | image |
| Nitella hyalina f. formosa | (T.F. Allen) R.D. Wood | image |
| Nitella hyalina f. maxima | Braun | image |
| Nitella hyalina f. minor | Vilhelm | image |
| Nitella hyalina var. aberrans | Han & W.Q. Chen | image |
| Nitella hyalina var. athanurensis | D. Subramanian | J. Indian Bot. Soc. | 64: 309, figs. 14-16 | 1985 |
| Nitella hyalina var. brachyactis | Braun | image |
| Nitella hyalina var. chelliammae_('chelliammai') | D. Subramanian | J. Indian Bot. Soc. | 64: 308, figs. 9-13 | 1985 |
| Nitella hyalina var. novaezeelandiae | A. Braun mscr. | image |
| Nitella hyalina var. oligactis | Braun | image |
| Nitella hyalina var. puduchattirensis | D. Subramanian | J. Indian Bot. Soc. | 64: 310, 311, figs. 17-21 | 1985 |
| Nitella hyalina var. sciejowicensis | J. Woloszynska | Acta Societatis Botanicorum Poloniae | 15: 24, pl. I | 1938 |
| Nitella hydropitys var. mexicana | T.F. Allen | image |
| Nitella ignescens | A. García | Phycologia | 37: 54, figs. 1-6, 11-17 | 1998 |
| Nitella imahorii | R.D. Wood | image |
| Nitella imperialis | (T.F. Allen) H. Sakayama in H. Sakayama, K. Miyaji, T. Nagumo, M. Kato, Y. Hara, & H. Nozaki | J. Phycol. | 41: 202 | 2005 |
| Nitella inaequalis | J. Groves | image |
| Nitella incerta | Krasavina | image |
| Nitella inokasiraensis | Kasai mss. | image |
| Nitella intermedia | Nordstedt | image |
| Nitella interrupta | (Ruprecht) Kützing | image |
| Nitella interrupta | A. Braun | image |
| Nitella interrupta | A. Braun | image |
| Nitella intricata | (Roth) C. Agardh | image |
| Nitella intricata | (Trentepohl ex Roth) C. Agardh | Syst.: | 125 | 1824 |
| Nitella intricata f. humilis | Areschoug | image |
| Nitella inversa | Imahori | image |
| Nitella iyengarii | M.C. Choudhury | Castanea | 36: 211, 1 pl. | 1971 |
| Nitella jaoi | Han | image |
| Nitella japonica | Allen | image |
| Nitella kamaensis | Krasavina | image |
| Nitella knightiae | Groves & Stephens | image |
| Nitella laeta | C. Agardh ined. | image |
| Nitella laxa | T.F. Allen | image |
| Nitella lechleri | Braun | image |
| Nitella leibergii | T.F. Allen | Characeae Amer. 2: | 19, pl. | 1896 |
| Nitella leonhardii | R.D. Wood | image |
| Nitella leptoclada | Braun | image |
| Nitella leptodactyla | James Groves | image |
| Nitella leptodactyla var. megaspora | J. Groves | J. Linn. Soc. London, Bot. | 48: 132 | 1928 |
| Nitella leptosoma | Nordstedt | image |
| Nitella leptostachys | Braun | image |
| Nitella leptostachys var. fruticosa | D. Subramanian | Indian Hydrobiology | 3: 71, figs. 1-8 | 2000 |
| Nitella leptostachys var. viscosa | D. Subramanian | Indian Hydrobiology | 3: 71 | 2000 |
| Nitella lhotzkyi | (A. Braun) A. Braun ex Kützing | Sp. alg.: | 516 | 1849 |
| Nitella lhotzkyi | (A. Braun) A. Braun ex Kützing | image |
| Nitella lhotzkyi | (Braun) Braun | image |
| Nitella lhotzkyi f. heterophylla | (A. Braun) R.D. Wood | image |
| Nitella lhotzkyi var. minor | Braun | image |
| Nitella limosa | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 337, fig. 8 | 2023 |
| Nitella lindheimeri | (Braun) Braun | image |
| Nitella longicaudata | Han & W.Q. Chen | image |
| Nitella longicoronula | Jao & Y.Y. Lee | image |
| Nitella longifurca | (Ruprecht) Kützing | image |
| Nitella macounii | (Allen) Allen | image |
| Nitella macounii | (T.F. Allen) T.F. Allen | Bull. Torrey Bot. Club | 15: 11 | 1888 |
| Nitella macrosperma | A. Braun ex Kützing | image |
| Nitella madagascariensis | Zaneveld | image |
| Nitella mariammae_('mariammai') | D. Subramanian | J. Indian Bot. Soc. | 64: 313, 314, figs. 2, 8-13 | 1985 |
| Nitella martinii | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 337, fig. 9 | 2023 |
| Nitella maruyamae | Kasaki | image |
| Nitella masoniae_('masonae') | (R.D. Wood) M.T. Casanova in Casanova et al. | Charophytes | 1: 10 | 2007 |
| Nitella mathuatae_('muthnatae') | T.F. Allen | Bull. Torrey Bot. Club | 14: 211, pl. LXXI | 1887 |
| Nitella mauritiana | Braun | image |
| Nitella megacarpa | Allen | image |
| Nitella megacarpa | T.F. Allen | Characeae Amer. Exsicc.: | 3 | 1880 |
| Nitella megacephala | E.-Y. Lee & S.-R. Lee in Lee et al. | Phytotaxa | 414: 179, figs. 1, 2 | 2019 |
| Nitella megaspora | (J. Groves) H. Sakayama in H. Sakayama, Y. Hara, & H. Nozaki | Phycologia | 43: 99 | 2004 |
| Nitella mexicana | T.F. Allen | image |
| Nitella micklei | M.T. Casanova in Casanova & Porter | Muelleria | 31: 55, fig. 2 | 2013 |
| Nitella microcarpa | A. Braun | image |
| Nitella microcarpa var. glaziovii | (Zeller) Zaneveld | image |
| Nitella microcarpa var. papuana | Zaneveld | image |
| Nitella microcarpa var. robusta | (Imahori) Imahori | image |
| Nitella microcarpa var. wrightii | H. Groves & J. Groves | image |
| Nitella micronesiaca | Imahori | image |
| Nitella microphylla | (Balbis & Nocca) Kützing in Riechenbach | Fl. Germ. Excurs. | 2: 843 | 1832 |
| Nitella microphylla | A. Braun | Hooker's J. Bot. | 1: 196 | 1849 |
| Nitella microphylla | Braun | image |
| Nitella microteles | M.B. Williams | image |
| Nitella minispora | Imahori & Suga | image |
| Nitella minuta | T.F. Allen | Characeae Amer. Exsicc.: | 34 | 1884 |
| Nitella mirabilis | Groves | image |
| Nitella mirabilis | Nordstedt ex J. Groves | image |
| Nitella mirabilis | Nordstedt var. inokasiraensis Imahori | image |
| Nitella missouriensis | T.F. Allen | Characeae Amer. 2: | 5, pl. | 1892 |
| Nitella moniliformis | Morioka | image |
| Nitella moniliformis | Zaneveld | image |
| Nitella monodactyla | Braun | image |
| Nitella monopodiata | J.C. van Raam | Beih. Nova Hedwigia | 110: 38, fig. 24 | 1995 |
| Nitella montana | T.F. Allen | Characeae Amer. 2: | 4, pl. | 1892 |
| Nitella montanae | Allen nom. nud. | image |
| Nitella montanae | T.F. Allen | image |
| Nitella moorei | J. Groves | image |
| Nitella moriokae | R.D. Wood | image |
| Nitella morongii | T.F. Allen | image |
| Nitella morongii var. spiciformis | (Morioka) Imahori | image |
| Nitella mucosa | (Nordstedt) J. Groves | image |
| Nitella mucronata | (A. Braun) Cosson & Germain de Saint-Pierre | Fl. Paris: | 683. Atlas Fl. Paris: pl. XL: D | 1845 |
| Nitella mucronata | (Braun) Kützing | image |
| Nitella mucronata | A. Braun f. haplophylla Hasslow | image |
| Nitella mucronata f. borealis | (Wallman ex Zetterstedt) R.D. Wood | image |
| Nitella mucronata f. budensis | Filarszky | image |
| Nitella mucronata f. capituligera | Boros | image |
| Nitella mucronata f. dictyosperma | (H. Groves & J. Groves) R.D. Wood | image |
| Nitella mucronata f. divaricata | (J. Groves & Stephens) R.D. Wood | image |
| Nitella mucronata f. doidgeae | (J. Groves & Stephens) R.D. Wood | image |
| Nitella mucronata f. duthiae | (J. Groves & Stephens) R.D. Wood | image |
| Nitella mucronata f. erecta | (Imahori) R.D. Wood | image |
| Nitella mucronata f. fascicularis | (Filarszky & G.O. Allen ex Filarszky) R.D. Wood | image |
| Nitella mucronata f. glaziovii | (Zell.) R.D. Wood | image |
| Nitella mucronata f. gracilens | (Morioka) R.D. Wood | image |
| Nitella mucronata f. graciliformis | (J. Groves) R.D. Wood | image |
| Nitella mucronata f. heteromorpha | (Braun) Braun | image |
| Nitella mucronata f. heteromorpha | Filarszky | image |
| Nitella mucronata f. heteromorpha | Nordstedt | image |
| Nitella mucronata f. heteromorpha | Wahlstedt | image |
| Nitella mucronata f. homomorpha | Wahlstedt | image |
| Nitella mucronata f. inversa | (Imahori) R.D. Wood | image |
| Nitella mucronata f. madagascariensis | (Zaneveld) R.D. Wood | image |
| Nitella mucronata f. maruyamae | (Kasaki) R.D. Wood | image |
| Nitella mucronata f. mauritiana | (A. Braun) R.D. Wood | image |
| Nitella mucronata f. musasiensis | (Morioka) R.D. Wood | image |
| Nitella mucronata f. oligospira | (A. Braun) R.D. Wood | image |
| Nitella mucronata f. papuana | (Zaneveld) R.D. Wood | image |
| Nitella mucronata f. patula | (J. Groves & G.O. Allen) R.D. Wood | image |
| Nitella mucronata f. polycarpa | (Pal) R.D. Wood | image |
| Nitella mucronata f. pseudoconglobata | R.D. Wood | image |
| Nitella mucronata f. pseudograciliformis | (Filarszky) R.D. Wood | image |
| Nitella mucronata f. pusilla | Teodoresco | image |
| Nitella mucronata f. robustior | (A. Braun) G. Feldmann | image |
| Nitella mucronata f. robustior | Leonhardi | image |
| Nitella mucronata f. robustior | Wahlstedt | image |
| Nitella mucronata f. shinii | (Imahori) R.D. Wood | image |
| Nitella mucronata f. tenuior | (A. Braun) C. Feldmann | image |
| Nitella mucronata f. tenuior | Leonhardi | image |
| Nitella mucronata f. tenuior | Wahlstedt | image |
| Nitella mucronata f. tuberculata | (Kundu) R.D. Wood | image |
| Nitella mucronata f. tumulosa | (Zaneveld) R.D. Wood | image |
| Nitella mucronata f. uruguayensis | (Horn) R.D. Wood | image |
| Nitella mucronata f. virgata | (Wallman) G. Feldmann | image |
| Nitella mucronata f. wrightii | (H. Groves & J. Groves) R.D. Wood | image |
| Nitella mucronata subsp. bonaërensis | (Spegazzini) R.D. Wood | image |
| Nitella mucronata subsp. flagellifera | (J. Groves & G.O. Allen) R.D. Wood | image |
| Nitella mucronata subsp. flagelliformis | (A. Braun) R.D. Wood | image |
| Nitella mucronata subsp. furcata | (Roxb. ex Bruzelius) R.D. Wood | image |
| Nitella mucronata subsp. megacarpa | (T.F. Allen) R.D. Wood | Taxon | 11: 18 | 1962 |
| Nitella mucronata subsp. orientalis | (T.F. Allen) R.D. Wood | image |
| Nitella mucronata subsp. tasmanica | (F. Mueller ex A. Braun) R.D. Wood | image |
| Nitella mucronata subvar. heteromorpha | Braun | image |
| Nitella mucronata var. alleninda | (Zaneveld) R.D. Wood | image |
| Nitella mucronata var. capitellata | (A. Braun) R.D. Wood | image |
| Nitella mucronata var. dixonii | (J. Groves) R.D. Wood | image |
| Nitella mucronata var. flabellata | (Weddell) Cosson & Germain de Saint-Pierre | Atlas Fl. Paris: | pl. XL: D: figs. 1-3 | 1845 |
| Nitella mucronata var. gracillima | J. Groves & Bullock-Webster | image |
| Nitella mucronata var. heteromorpha | (Braun) Cosson & Germain de Saint-Pierre | Atlas Fl. Paris: | pl. XL: D: figs. 4, 5 | 1845 |
| Nitella mucronata var. heteromorpha | (Braun) Kützing | image |
| Nitella mucronata var. heteromorpha | Leonhardi | image |
| Nitella mucronata var. inaequalis | (J. Groves) R.D. Wood | image |
| Nitella mucronata var. koreana | Imahori & Choe | image |
| Nitella mucronata var. mobilis | J. Groves | image |
| Nitella mucronata var. ogivalis | (J. Groves & Stephens) R.D. Wood | image |
| Nitella mucronata var. pseudograciliformis | (Filarszky) Zaneveld | image |
| Nitella mucronata var. robustior | Braun | image |
| Nitella mucronata var. robustior | Leonhardi | image |
| Nitella mucronata var. sieberi | (A. Braun) Kützing | Sp. alg.: | 515 | 1849 |
| Nitella mucronata var. sieberi | (Braun) Kützing | image |
| Nitella mucronata var. tenuior | A. Braun | image |
| Nitella mucronata var. tenuior | Braun | image |
| Nitella mucronata var. tenuior | Leonhardi | image |
| Nitella multifera | Jao & Y.Y. Lee | image |
| Nitella multipartita f. intermedia | T.F. Allen | image |
| Nitella multipartita f. suberecta | T.F. Allen | image |
| Nitella multipartita f. transiliforma | T.F. Allen | image |
| Nitella multipartita | T.F. Allen | image |
| Nitella musasiensis | Morioka | image |
| Nitella muthnatae | T.F. Allen | image |
| Nitella myriophylla | F. v. Mueller | image |
| Nitella myriotricha | A. Braun | image |
| Nitella myriotrichia subsp. acuminata | D. Subramanian | Seaweed Res. & Utilis. | 21: 106, pl. II; pl. IV: fig. 1 | 1999 |
| Nitella myriotrichia subsp. incurvata | D. Subramanian | Seaweed Res. & Utilis. | 21: 106, pl. I; pl. IV: figs. 2-4 | 1999 |
| Nitella neyrautii | Hy | Bull. Soc. Bot. France | 61: 239 | 1914 |
| Nitella nidifica | (Mueller) C. Agardh | image |
| Nitella nidifica var. polysperma | (A. Braun) Rabenhorst | image |
| Nitella nilgherensis | D. Subramanian | Indian Hydrobiology | 3: 73, figs. 20-26 | 2000 |
| Nitella nitida | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 343, fig. 12 | 2023 |
| Nitella nordstedtiana | H. Groves & J. Groves | J. Bot. (London) | 28: 66, pl. 296: figs. a-c | 1890 |
| Nitella nordstedtii_('norstedtii') | (Hy) Hy | Bull. Soc. Bot. France | 61: 239 | 1914 |
| Nitella normaniana | Nordstedt | image |
| Nitella norvegica | Wallman | image |
| Nitella obtusa | T.F. Allen | Characeae Amer. 2: | 3, pl. | 1894 |
| Nitella occidentalis | Allen | image |
| Nitella ogivalis | Groves & Stephens | image |
| Nitella oligogyra | Morioka | image |
| Nitella oligospira | A. Braun | image |
| Nitella oligospira f. australiana | Nordstedt | Lunds Univ. A\*orsskr. 25, Afd. Math. och Naturv. | 4: 26 | 1889 |
| Nitella oligospira var. australiensis | F.M. Bailey | Compr. cat. Queensland pl.: | 678 | 1913 |
| Nitella oligospira var. wrightii | A. Braun in Nordstedt | Abh. K. Akad. Wiss. Berlin | 1882: 70, pl. II: figs. 53-55 | 1882 |
| Nitella oollooensis | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 343, fig. 13 | 2023 |
| Nitella opaca | (C. Agardh) C. Agardh | image |
| Nitella opaca f. atrovirens | (Wallman) Wahlstedt | image |
| Nitella opaca f. brevifolia | Wahlstedt | image |
| Nitella opaca f. diversifolia | Filarszky | image |
| Nitella opaca f. elongata | A. Braun ex Migula | Die Characeen Deutschland, Oesterreich und der Schweiz: | 127 | 1889 |
| Nitella opaca f. laxa | Wahlstedt | image |
| Nitella opaca f. laxior | Wahlstedt | image |
| Nitella opaca f. longifolia | Wahlstedt | image |
| Nitella opaca f. pseudoflexilis | Vilhelm | image |
| Nitella opaca f. subcapitata | Wahlstedt | image |
| Nitella opaca var. atrovirens | (Wallman.) Wahlstedt | image |
| Nitella opaca var. attenuata | H. Groves & J. Groves | image |
| Nitella opaca var. brachyclema | J. Groves & Bullock-Webster | image |
| Nitella opaca var. nodosa | Trabut | image |
| Nitella orientalis | T.F. Allen | image |
| Nitella ornithopoda | A. Braun | image |
| Nitella ornithopoda f. brachyphylla | Henriques | image |
| Nitella pakistanica | Faridi | image |
| Nitella pakistanica var. magniantheridia | Y.J. Li | Acta Phytotax. Sin. | 23: 159, fig. 8 | 1985 |
| Nitella paludigena | M.T. Casanova & K.G. Karol | Austral. Syst. Bot. | 21: 203, figs. 1, 2a,b, 3a-f | 2008 |
| Nitella papillata | Han & W.Q. Chen | image |
| Nitella parooensis | M.T. Casanova & J.L. Porter | Muelleria | 31: 54, fig. 1 | 2013 |
| Nitella partita | Nordstedt | image |
| Nitella patula | J. Groves & G.O. Allen | image |
| Nitella paucicostata | T.F. Allen | Bull. Torr. Bot. Club | 21: 525 | 1894 |
| Nitella pedunculata | C. Agardh | image |
| Nitella penicillata | Braun | image |
| Nitella petchii | J. Groves | image |
| Nitella plumosa | Braun | image |
| Nitella plurifurcata | Han & Fu | image |
| Nitella polycarpa | B.P. Pal | image |
| Nitella polycarpa f. gujaratensis | A.K. Jawale & R.J. Patel | J. Indian Bot. Soc. | 64: 317, 318, pls. I, II | 1985 |
| Nitella polycephala | A. Braun | image |
| Nitella polyglochin | Braun | image |
| Nitella polyglochin f. japonica | Migula | image |
| Nitella polyglochin f. javanica | Filarszky | image |
| Nitella polyglochin var. zollingeri | A. Braun | image |
| Nitella polygyra | A. Braun | image |
| Nitella polysperma | (Braun) Kützing | image |
| Nitella praeclara | Groves & Stephens | image |
| Nitella praelonga [Braun] | | image |
| Nitella praelonga var. cernua | (A. Braun) R.D. Wood | image |
| Nitella preflexilis_('pre-flexilis') | Menéndez Amor | image |
| Nitella procera | Han & W.Q. Chen | image |
| Nitella procera | Wallman | image |
| Nitella prolifera | (Braun) Kützing | image |
| Nitella prolifera | Jao & Y.Y. Lee | image |
| Nitella pseudoflabellata | A. Braun | image |
| Nitella pseudoflabellata f. australiana | Nordstedt | image |
| Nitella pseudoflabellata f. baronii | (H. Groves & J. Groves) R.D. Wood | image |
| Nitella pseudoflabellata f. crispa | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. elegans | (Pal) R.D. Wood | image |
| Nitella pseudoflabellata f. horikawae | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. imperialis | (T.F. Allen) R.D. Wood | Taxon | 11: 19 | 1962 |
| Nitella pseudoflabellata f. mucosa | Nordstedt | image |
| Nitella pseudoflabellata f. pusilla | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. rivularis | Nordstedt | image |
| Nitella pseudoflabellata f. sejuncta | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. spinosa | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. stabilis | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. stagnalis | Nordstedt | image |
| Nitella pseudoflabellata f. stricta | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. sumatrana | (Filarszky) R.D. Wood | image |
| Nitella pseudoflabellata f. testaglabra_('testa-glabra') | T.F. Allen | image |
| Nitella pseudoflabellata f. tuyamae | (Imahori) R.D. Wood | image |
| Nitella pseudoflabellata f. vermiculata | (J. Groves) R.D. Wood | image |
| Nitella pseudoflabellata f. wattii | (J. Groves) R.D. Wood | image |
| Nitella pseudoflabellata subsp. comptonii | (J. Groves) R.D. Wood | image |
| Nitella pseudoflabellata var. conformis | (Nordstedt) R.D. Wood | image |
| Nitella pseudoflabellata var. confusa | R.D. Wood | Nova Hedwigia | 22: 70 | 1972 |
| Nitella pseudoflabellata var. corymbosa | D. Subramanian | J. Indian Bot. Soc. | 64: 306, 307, figs. 1-4 | 1985 |
| Nitella pseudoflabellata var. gelatinosa | D. Subramanian | J. Indian Bot. Soc. | 64: 307, 308, figs. 5-8 | 1985 |
| Nitella pseudoflabellata var. imperialis | T.F. Allen | Bull. Torrey Bot. Club | 25: 78 | 1898 |
| Nitella pseudoflabellata var. leptodactyla | (J. Groves) R.D. Wood | image |
| Nitella pseudoflabellata var. mathuatae | (T.F. Allen) R.D. Wood | image |
| Nitella pseudoflabellata var. minor | Imahori | image |
| Nitella pseudoflabellata var. mucosa | (Nordstedt) R.D. Wood | image |
| Nitella pseudoflabellata var. multipartita | (T.F. Allen) R.D. Wood | image |
| Nitella pseudoflabellata var. ramusculus_('ramuscula') | T.F. Allen | image |
| Nitella pseudoflabellata var. sonderi | (A. Braun) R.D. Wood | image |
| Nitella pseudoflabellata var. sonderi | (Braun) R.D. Wood | Taxon | 11: 19 | 1962 |
| Nitella pseudograciliformis | Filarszky | image |
| Nitella pseudohyalina | Han & W.Q. Chen | image |
| Nitella pseudotenuissima | Kundu | image |
| Nitella pulchella | T.F. Allen | image |
| Nitella pusilla | Imahori | image |
| Nitella quadriscutulum | Jao & Y.Y. Lee | image |
| Nitella renovii | (Hy) Hy | Bull. Soc. Bot. France | 61: 239 | 1914 |
| Nitella reticulata | M.B. Williams | image |
| Nitella rigida f. saitoiana | (T.F. Allen) R.D. Wood | image |
| Nitella rigida f. tanakiana | (T.F. Allen) R.D. Wood | image |
| Nitella rigida | T.F. Allen | image |
| Nitella rigida var. saitoiana | (T.F. Allen) Imahori | image |
| Nitella robusta | Imahori | image |
| Nitella robusta | Stache | image |
| Nitella roxburghii | Braun | image |
| Nitella saharanpurensis | G.O. Allen | image |
| Nitella saitoiana | T.F. Allen | image |
| Nitella sejuncta | Imahori | image |
| Nitella septentrionalis | Molinari & Guiry | Notulae algarum | 184: 8 | 2021 |
| Nitella sessilis | Y.J. Li | Acta Phytotax. Sin. | 23: 153, fig. 1 | 1985 |
| Nitella shandongensis | Y.J. Ling, G.Z. Deng & Z. Li | Acta Hydrobiologica Sinica | 16: 63, fig. 2 | 1992 |
| Nitella shinii | Imahori | image |
| Nitella sieberi | (A. Braun) R.D. Wood | Rev. Characeae, 1: | 485 | 1965 |
| Nitella silicea | M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 345, fig. 14 | 2023 |
| Nitella singaporensis | R.E. Romanov, R.S.W. Yeo, B.C. Ho, V.Yu. Nikulin & A.A. Gontcharov sp. nov. | Phytotaxa | 438: 81, figs. 1-37 | 2020 |
| Nitella smithii | (Babington) Wallman | image |
| Nitella sonderi | A. Braun | image |
| Nitella sonderi | Braun | Linnaea | 25(6): 704 | 1853 |
| Nitella spanioclema | Groves & Bullock-Webster | image |
| Nitella spanioclema | J. Groves & Bullock-Webster | J. Botany (London) | 57: 1, pl. 551 | 1919 |
| Nitella spanioclema var. nidifica | F.K. Daily | image |
| Nitella sphaerocephala | J. Groves | image |
| Nitella spiciformis | Morioka | image |
| Nitella spiciformis var. oligogyra | (Morioka) Imahori | image |
| Nitella spinosa | Imahori | image |
| Nitella spongifera | Vieillard | image |
| Nitella stabilis | Imahori | image |
| Nitella stabilis var. sanukensis | Imahori | image |
| Nitella stellaris | T.F. Allen | image |
| Nitella stelligera | (Bauer) Cosson & Germain | image |
| Nitella stelligera | (Bauer) Kützing | image |
| Nitella stelligera var. ulvoides | (Bertoloni) Kützing | image |
| Nitella stenhammariana | (Wallman) Wallman | image |
| Nitella stenhammariana | (Wallman) Wallman | image |
| Nitella stenhammariana | Wallman | image |
| Nitella stricta | Imahori | image |
| Nitella struthioptila | Groves & Stephens | image |
| Nitella stuartiana | F. Mueller ex Kützing | Tab. Phyc. | 7: 11, pl. 28: fig. I | 1857 |
| Nitella stuartiana | Ferdinand Mueller | image |
| Nitella stuartii var. macroreticulata | Han | image |
| Nitella stuartii var. tolypelloides | Jao & Y.Y. Lee | image |
| Nitella stuartii_('Stuarti') | Braun | image |
| Nitella subglomerata | A. Braun | image |
| Nitella subglomerata var. japonica | T.F. Allen | image |
| Nitella subimpressa | Stache | image |
| Nitella sublucens | T.F. Allen | image |
| Nitella subspicata | T.F. Allen | image |
| Nitella subtilissima | Braun | image |
| Nitella subtilissima f. biformis | (A. Braun) R.D. Wood | image |
| Nitella subtilissima f. microphylla | (A. Braun) R.D. Wood | image |
| Nitella subtilissima f. microphylla | R.D. Wood | Taxon | 11: 21 | 1962 |
| Nitella subtilissima var. gloeostachys | (A. Braun) R.D. Wood | image |
| Nitella subtilissima var. microphylla | (A. Braun) R.D. Wood | image |
| Nitella subtilissima var. microphylla | (R.D. Wood) R.D. Wood | Nova Hedwigia | 22: 73 | 1972 |
| Nitella sumatrana | Filarszky | image |
| Nitella superba | B.P. Pal | image |
| Nitella swanensis | M.D. Guiry & M.T. Casanova | Notulae Algarum | 292: 1 | 2023 |
| Nitella syncarpa | (Thuillier) Kützing | image |
| Nitella syncarpa f. brachyphylla | Wahlstedt | image |
| Nitella syncarpa f. elongata | Wahlstedt | image |
| Nitella syncarpa f. leiopyrena | Leithe | image |
| Nitella syncarpa f. longifolia | Wahlstedt | image |
| Nitella syncarpa f. microcephala | Leithe | image |
| Nitella syncarpa f. minor | Wahlstedt | image |
| Nitella syncarpa f. munda | Wahlstedt | image |
| Nitella syncarpa f. robustior | Wahlstedt | image |
| Nitella syncarpa f. tenuior | Wahlstedt | image |
| Nitella syncarpa subf. elongata | Wahlstedt | image |
| Nitella syncarpa var. brevifolia | Braun | image |
| Nitella syncarpa var. capitata | (Nees) Kützing | image |
| Nitella syncarpa var. gloeocephala | Kützing | image |
| Nitella syncarpa var. glomerata | (Desvaux) Braun illeg. | image |
| Nitella syncarpa var. laxa | Braun | image |
| Nitella syncarpa var. leiopyrena | Braun | image |
| Nitella syncarpa var. longifolia | Braun | image |
| Nitella syncarpa var. macrosperma | (Braun ex Kützing) Kützing | image |
| Nitella syncarpa var. macrosperma | A. Braun | image |
| Nitella syncarpa var. opaca | (C. Agardh) Kützing | image |
| Nitella syncarpa var. oxygyra | A. Braun ex Rabenhorst | image |
| Nitella syncarpa var. oxygyra_('oxygyna') | Braun | image |
| Nitella syncarpa var. pachygyra | Braun | image |
| Nitella syncarpa var. pseudoflexilis | (A. Braun) Rabenhorst | image |
| Nitella syncarpa var. smithii | (Weddell) Cosson & Germain de Saint-Pierre | Atlas Fl. Paris: | pl. XXXIX: figs. 7-12 | 1845 |
| Nitella szechwanensis | Han | image |
| Nitella tanakiana | T.F. Allen | image |
| Nitella tasmanica | Braun | image |
| Nitella tasmanica | Kützing | image |
| Nitella tasmanica subsp. gelatinifera | Wood | image |
| Nitella tasmanica var. afoliata | R.D. Wood | Nova Hedwigia | 22: 54 | 1972 |
| Nitella tasmanica var. afoliolata | R.D. Wood | image |
| Nitella tasmanica var. beaugleholei_('beaugleholii') | R.D. Wood | image |
| Nitella tasmanica var. gelatinifera | R.D. Wood | image |
| Nitella temiscouatae | T.F. Allen | image |
| Nitella tenuissima | (Desvaux) Kützing | image |
| Nitella tenuissima f. algerica | Trabut mscr. | image |
| Nitella tenuissima f. bengalensis | (Kundu) R.D. Wood | image |
| Nitella tenuissima f. brevifolia | T.F. Allen | image |
| Nitella tenuissima f. byssoides | (A. Braun) R.D. Wood | image |
| Nitella tenuissima f. transilis | (T.F. Allen) R.D. Wood | Taxon | 11: 20 | 1962 |
| Nitella tenuissima subsp. ornithopoda | (A. Braun) R.D. Wood | image |
| Nitella tenuissima var. americana | (Braun) T.F. Allen | image |
| Nitella tenuissima var. batrachosperma | (Thuillier) Kützing | image |
| Nitella tenuissima var. callista | J. Groves | image |
| Nitella tenuissima var. japonica | Imahori | image |
| Nitella tenuissima var. moniliformis | Brébisson | Flore de la Normandie, ed. 2: | 338 | 1849 |
| Nitella tenuissima var. sanukensis | (Imahori) R.D. Wood | image |
| Nitella tenuissima var. stellata | Rabenhorst | image |
| Nitella terrestris | Iyengar | image |
| Nitella terrestris var. minor | Chacko | image |
| Nitella thillaiammae_('thillaiammai') | D. Subramanian | J. Indian Bot. Soc. | 64: 312, 313, figs. 1, 3-7 | 1985 |
| Nitella tolypelloides | M.M. Picelli-Vicentim | Arch. Hydrobiol. Suppl. | 94 (Algol. Stud. 66): 31, figs. 1-13 | 1992 |
| Nitella townsendii | M.T. Casanova in M.T. Casanova & K.G. Karol | Australian Systematic Botany | 36: 348, fig. 15 | 2023 |
| Nitella transilis | T.F. Allen | Characeae Amer. 2: | 24, pl. | 1896 |
| Nitella translucens | (J.E. Smith) Jenner | image |
| Nitella translucens | (Pers.) C. Agardh | image |
| Nitella translucens | Cosson & Germain de Saint-Pierre | Atlas Fl. Paris: | pl. XL: B | 1845 |
| Nitella translucens f. caroliniana | Imahori & R.D. Wood | image |
| Nitella translucens subsp. sublucens | (T.F. Allen) R.D. Wood | image |
| Nitella translucens subsp. tricellularis | Nordstedt | image |
| Nitella translucens var. axillaris | (A. Braun) R.D. Wood | image |
| Nitella translucens var. brachyteles | (A. Braun) G. Feldmann | image |
| Nitella translucens var. intermedia | Brébisson | Flore de la Normandie, ed. 2: | 337 | 1849 |
| Nitella translucens var. leptoclada | (A. Braun) R.D. Wood | image |
| Nitella tricellularis f. setchellii | R.D. Wood | image |
| Nitella tricuspis | Braun | image |
| Nitella tricuspis var. dregeana | (Braun ex Kützing) Braun | image |
| Nitella tricuspis var. euarthra | Braun | image |
| Nitella tricuspis var. grandis | (Braun ex Kützing) Braun | image |
| Nitella tricuspis var. macilenta | Braun | image |
| Nitella tuberculata | Kundu | image |
| Nitella tubulosa | Salzmann | image |
| Nitella tumida | Nordstedt | image |
| Nitella tumulosa var. pumila | Zaneveld | image |
| Nitella tumulosa | Zaneveld | image |
| Nitella tuyamae | Imahori | image |
| Nitella ulvoides | (Bertoloni) Kützing | image |
| Nitella ungula | A. García | Phycologia | 37: 56, figs. 7-10, 18-26 | 1998 |
| Nitella uruguayensis | Horn af Rantzien | image |
| Nitella varians | Jao & Y.Y. Lee | image |
| Nitella vermiculata | J. Groves | image |
| Nitella verticillata | (Filarszky & G.O. Allen ex Filarszky) R.D. Wood | image |
| Nitella verticillata var. kodaikanalensis | D. Subramanian | Indian Hydrobiology | 3: 72, figs. 9-15 | 2000 |
| Nitella vieillardii | (A. Braun) H. Sakayama in H. Sakayama, K. Miyaji, T. Nagumo, M. Kato, Y. Hara, & H. Nozaki | J. Phycol. | 41: 204 | 2005 |
| Nitella virgata | Wellman | image |
| Nitella wahlbergiana | Wallman | image |
| Nitella wahlenbergiana | Wallman | image |
| Nitella wattii | Groves | image |
| Nitella wattii | J. Groves | image |
| Nitella zamanii | S. Naz, N.J. Diba & H. Schubert in Diba et al. | Bangladesh J. Plant Taxonomy | 21: 181, figs. 1-14, pl. 1 | 2014 |
| Nitella zeyheri | A. Braun | image |
| Nitella zollingeri | A. Braun | image |
| NITELLACEAE | Haeckel | image |
| NITELLAE | T.F. Allen | image |
| Oedogonium nitellae | Zhu | image |
| PALAEONITELLA | Kidston & Lang | image |
| PALAEONITELLA | Kidston & Lang ex Pia | image |
| Palaeonitella cranii | (Kidston & Lang) Pia | image |
| Pseudospora nitellarum | Cienkowski | image |
| Wrangelia nitella | Harvey | Trans. R. Irish Acad. | 22(Science): 546 | 1855 |