Index Nominum Algarum Image Index
1964 CARD IMAGES
beginning with IRIDEA Stackhouse
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Processed by T. Rosatti
- IRIDEA Stackhouse
- IRIDEA Bory
- IRIDEAE \{also on card: several sections by Postels & Ruprecht\}
- IRIDAEA Postels & Ruprecht {also on card: sect. of Iridaea}
- Iridaea (Bory) Kim \{also on card: subgenus of Gigartina\}
- IRIDAEA \{also on card: subgenus or section Porphyridaea J. Agardh\}
- Iridaea affinis Postels & Ruprecht
- Iridaea agardhiana (Setchell & Gardner) Kylin
- Iridaea agathoicus Delf & Michell
- Hystrichokolpoma xiphea (Maier) Davey & Williams
- Hystrichokolpoma unispina ('unispinum') Williams & Downie
- Iridaea australasica J. Agardh
- Iridaea belangeri Bory
- Iridaea berteroana Montagne in Herb. propr.
- Iridaea binderi J. Agardh ex Kützing
- Iridaea boryana (Setchell & Gardner) Skottsberg
- Iridaea caespitipes (Setchell & Gardner) Skottsberg
- Iridaea californica (J. Agardh) Kylin
- Iridaea capensis J. Agardh
- Iridaea capensis var. elongata Grun.
- Iridaea carnosa J. Agardh ex Kützing
- Iridaea ciliata Kützing
- Iridaea clathrata Decaisne
- Iridaea clavellosa Suhr
- Iridaea convoluta (J. E. Areschoug ex J. Agardh) Hewitt
- Iridaea cordata (Turn.) Bory
- Iridaea cordata var. dichotoma Hooker f. & Harvey
- Iridaea cordata [var.] elongata Suhr [apparently mscr.]
- Iridaea cordata var. splendens (Setchell & Gardner) Abbott
- Iridaea coriacea (Setchell & Gardner) Scagel
- Iridaea cornea Kützing
- Iridaea cornucopiae Postels & Ruprecht
- Iridaea cornucopiae subsp. japonica (Yamada & Mikami) Perestenko
- Iridaea cornucopiae var. papillata Postels & Ruprecht
- Iridaea cornucopiae subsp. yendoi (Yamada & Mikami) Perestenko
- Iridaea crispata Bory de Saint-Vincent
- Iridaea curvata Kützing
- Iridaea cutleriae Montagne
- Iridaea decipiens J.D. Hooker & Harvey
- Iridaea dentata Kützing
- Iridaea dentata [beta] minor Kützing
- Iridaea dichotoma (J. Agardh) Endlicher
- Iridaea arabica Montagne mss.
- Iridaea atropurpurea J. Agardh
- Iridaea augustinae Bory
- Iridaea divisa Kützing
- Iridaea dubyi Lenormand in herb.
- Iridaea dubyi (Chauvin) Montagne
- Iridaea edulis (Stackhouse) Greville
- Iridaea elliptica Kützing
- Iridaea erinacea (Turner) Bory
- Iridaea explanata Suhr
- Iridaea fimbriata Kützing
- Iridaea fissa Suhr
- Iridaea flaccida (Setchell & Gardner) P. C. Silva
- Iridea fluitans Stackhouse
- Iridaea foliifera Harvey
- Iridaea foliosa Meneghini
- Iridaea fulgens (Setchell & Gardner) Papenfuss
- Iridaea furcata (Setchell & Gardner) Papenfuss
- Iridaea gigantea Kützing
- Iridaea gigantea J. Agardh
- Iridaea harveyi De Toni
- Iridaea heterocarpa Postels & Ruprecht
- Iridaea heterococca Kützing
- Iridaea hilliana Greville
- Iridaea insignis Endlicher & Diesing
- Iridaea irregularis Kützing
- Iridaea labyrinthifolia Kützing
- Iridaea lacera Postels & Ruprecht
- Iridaea laminarioides Bory de Saint-Vincent
- Iridaea laminarioides f. cordata (Turner) Setchell & Gardner
- Iridaea laminarioides var. cornucopiae (Postels & Ruprecht) J. Agardh
- Iridaea laminarioides var. laciniata Grun.
- Iridaea laminarioides f. minor Setchell
- Iridaea laminarioides f. parvula Kjellman
- Iridaea laminarioides f. punicea (Postels & Ruprecht) Setchell & Gardner
- Iridaea laminarioides f. typica Setchell
- Iridaea lanceolata Harvey
- Iridaea lanceolata Harvey mss.
- Iridaea lapathifolia Kützing
- Iridaea latissima (Hooker & Harvey) Grunow
- Iridaea lilacina Postels & Ruprecht
- Iridaea linearis (Setchell & Gardner) Kylin
- Iridaea littoralis Crouan fr.
- Iridaea lubrica Suhr
- Iridaea lubrica (Suhr) Kützing
- Iridaea lusoria (Greville) Harvey
- Iridaea macrodonta Skottsberg
- Iridaea marginata (Roussel) Endlicher
- Iridaea mawsonii ('mawsoni') Lucas
- Iridaea mawsonii ('mawsoni') Lucas
- Iridaea membranacea J. Agardh
- Iridaea mertensiana Postels & Ruprecht
- Iridaea micans Bory
- Iridaea micans Bory
- Iridaea micans var. augustinae (Bory) Hariot
- Iridaea micans var. ciliolata Hook. f. & Harvey
- Iridaea micans [var.] obovata (Kützing) Kützing
- Iridaea micrococca Kützing
- Iridaea microphylla 'Harvey'
- Iridaea minor (J. Agardh) Endlicher
- Iridaea montagnei Bory
- Iridaea oblongifructa Setchell
- Iridaea obovata Kützing
- Iridaea obtusiloba E. S. Sinova
- Iridaea orbitosa Suhr
- Iridaea oregona (Doty) Papenfuss
- Iridaea ornata Postels & Ruprecht
- Iridaea papillata (Agardh) Greville
- Iridaea papillosa Bory
- Iridaea papillosa Bory de Saint-Vincent
- Iridaea pappeana Sonder mscr.
- Iridaea pappeana Kützing
- Iridaea parksii (Setchell & Gardner) Papenfuss
- Iridaea phyllocarpa Postels & Ruprecht
- Iridaea parvula (Kjellman) Papenfuss
- Iridaea pinnata Postels & Ruprecht
- Iridaea platyna (Agardh) Postels & Ruprecht
- Iridaea platyna (Agardh) Kützing
- Iridaea polycarpa Harvey
- Iridaea prolifera (J. Agardh) De Toni
- Iridaea proliferans Skottsberg
- Iridaea pulchra Kützing
- Iridaea pulchra Kützing
- Iridaea punicea Postels & Ruprecht
- Iridaea purpurea (J. Agardh) De Toni
- Iridaea pustulosa Postels & Ruprecht
- Iridaea radula (Esper) Bory
- Iridaea reediae (Setchell & Gardner) Papenfuss
- Iridaea remuliformis Ricker
- Iridaea reniformis (Turn.) Greville
- Iridaea reticulata Montagne
- Iridaea rosea Kylin
- Iridaea ruprechtiana E. S. Sinova
- Iridaea ruprechtiana f. angustifolia E. S. Sinova
- Iridaea sanguinea (Setchell & Gardner) Hollenberg & Abbott
- Iridaea serratifolia 'J. Agardh'
- Iridaea sinicola (Setchell & Gardner) Papenfuss
- Iridaea socialis Postels & Ruprecht
- Iridaea splendens (Setchell & Gardner) Papenfuss
- Iridaea stiriata (Turner) J.D. Hooker & Harvey
- Iridaea tagana Welwitsch
- Iridaea tuberculosa (J.D. Hooker & Harvey) G.L. Leister
- Iridaea undulata 'J. Agardh'
- Iridaea undulosa Bory
- Iridaea undulosa [beta] papillosa Bory
- Iridaea violacea Kützing
- Iridaea violacea [beta] prolifera Kützing
- Iridaea volans (Agardh) Greville
- SCANNING ERROR
- Iridaea whidbeyana (Setchell & Gardner) Scagel
- Iridaea yemensis Montagne
- IRIDOPHYCUS Setchell & Gardner
- IRIDOPHYCUS subgenera
- Iridophycus agardhianus_('agardhianum') Setchell & Gardner
- Iridophycus boryanus_('boryanum') Setchell & Gardner
- Iridophycus caespitipes Setchell & Gardner
- Iridophycus californicus_('californicum') (J. Agardh) Dawson
- Iridophycus capensis (J. Agardh) Setchell & Gardner
- Iridophycus ciliatus_('ciliatum') (Kützing) Setchell & Gardner
- Iridophycus cordatus_('cordatum') (Turner) Setchell & Gardner
- Iridophycus coriaceus_('coriaceum') Setchell & Gardner
- Iridophycus cornucopiae (Postels & Ruprecht) Setchell & Gardner
- Iridophycus crispatus_('crispatum') (Bory) Setchell & Gardner
- Iridophycus flaccidus_('flaccidum') Setchell & Gardner
- Iridophycus fulgens Setchell & Gardner
- Iridophycus heterocarpus_('heterocarpum') (Postels & Ruprecht) Setchell & Gardner
- Iridophycus heterocarpus_('heterocarpum') (Postels & Ruprecht) Setchell & Gardner
- Iridophycus laminarioides (Bory) Setchell & Gardner
- Iridophycus linearis_('lineare') Setchell & Gardner
- Iridophycus membranaceus_('membranaceum') (J. Agardh) Setchell & Gardner
- Iridophycus micans (Bory) Setchell & Gardner
- Iridophycus micrococcus_('micrococcum') (Kützing) Setchell & Gardner
- Iridophycus obovatus_('obovatum') (Kützing) Setchell & Gardner
- Iridophycus oregonus_('oregonum') Doty
- Iridophycus parksii Setchell & Gardner
- Iridophycus parvulus_('parvulum') (Kjellman) Setchell & Gardner
- Iridophycus reediae Setchell & Gardner
- Iridophycus sanguineus_('sanguineum') Setchell & Gardner
- Iridophycus sinicola Setchell & Gardner
- Iridophycus splendens Setchell & Gardner
- Iridophycus subdichotomus_('subdichotomum') Nagai
- Iridophycus undulosus_('undulosum') (Bory) Setchell & Gardner
- Iridophycus whidbeyanus_('whidbeyanum') Setchell & Gardner
- Isabelidinium acuminatum ('acuminata') (Cookson & Eisenack) Stover & Evitt
- Isabelidinium balmei (Cookson & Eisenack) Stover & Evitt
- Isabelidinium cretaceum subsp. oviforme S. Mao & B.A.R. Mohr
- Isabelidinium cretaceum subsp. gravidum S. Mao & B.A.R. Mohr
- Isabelidinium extremum (Cookson & Eisenack) Stover & Evitt
- Isabelidinium gallia (Davey & Verdier) Stover & Evitt
- Isabelidinium magnum (Davey) Stover & Evitt
- ISABOTTIA M.S. Balakrishnan
- Isabottia ovalifolia (Kylin) M.S. Balakrishnan
- ISACTIS Thuret
- ISACTIS Thuret ex Bornet & Flahault
- ISACTIS (Thuret) Thuret \{also on card: Section of Rivularia\}
- Isactis caespitosa (Kützing) Wolle
- Isactis caespitosa f. tenuior-viridis ('tenuior viridis') Rabenhorst
- Isactis centrifuga Bornet
- Isactis centrifuga Bornet
- Isactis fluviatilis (Kützing) Kirchner
- Isactis nipponica Hirose
- Isactis plana var. fissurata (Crouan fr.) Bornet & Flahault
- Isactis plana (Harvey) Thuret
- Isactis plana Thuret ex Bornet & Flahault
- Isactis plana var. fissurata Bornet & Flahault
- Isactis plana f. fissurata (Crouan) Batters
- Isactis plana var. plana {info}
- ISCHADITES R. I. Murchison
- Ischadites abbottiae_('abbottae') Nitecki
- ISHIGE Yendo
- Ishige foliacea Okamura mscr.
- Ishige foliacea Okamura
- Ishige okamurae_('okamurai') Yendo
- Ishige sinicola (Setchell & Gardner) Chihara
- ISOCHROUS Kjellman \{also on card: Subgenus of Acrosiphonia\}
- ISOCHRYSIS M. Parke
- Isochrysis galbana M. Parke
- Isochrysis litoralis Billard & Gayral
- Isochrysis maritima Billard & Gayral
- ISOCOCCUS F. E. Fritsch
- Isococcus sphagnicola ('sphagnicolus') Fritsch
- ISOCRYSTALLITHUS J. W. Verbeek
- ISOCYSTIS Borzì
- ISOCYSTIS Borzì ex Bornet & Flahault
- Isocystis andalusica ('andalusicus') González Guerrero
- Isocystis halobia K. Anagnostidis & M. Roussomoustakaki
- Isocystis infusionum (Kützing) Borzě
- Isocystis infusionum Borzě ex Bornet & Flahault
- Isocystis lithophila Ercegovic
- Isocystis major Weber Bosse
- Isocystis messanensis Borzì
- Isocystis messanensis Borzì ex Bornet & Flahault
- Isocystis minutissima ('minutissimum') (Kützing) J. Komárek & K. Anagnostidis \{pcs\}
- Isocystis moniliformis Borzì
- Isocystis moniliformis Borzì ex Bornet & Flahault
- Isocystis planctonica Starmach
- Isocystis spermosiroides Borzì
- Isocystis richteri (Elenkin) J. Komárek & K. Anagnostidis
- Isocystis spermosiroides Borzì ex Bornet & Flahault
- ISODISCUS Rattray
- ISODISCUS (Rattray) Schütt
- Isodiscus coronalis J. Brun
- Isodiscus coronatus "Brun"
- Isodiscus debyi (Grove & Sturt) Rattray (CAS)
- Isodiscus mirificus Rattray (CAS)
- ISOGONIA J. Agardh
- ISOGONIUM (Kützing) de Bary \{also on card: subgenus of Oedogonium\}
- ISOGONIUM Kützing \{also on card: section of Oedogonium\}
- Isogonium capillare Kützing
- ISOMENIA De la Pylaie
- Isomenia palmata (L.) De la Pylaie
- ISOMITA Diesing \{also on card: [subgenus] of Monas\}
- ISOMITA Diesing
- Isomita angusta (Dujardin) Diesing
- Isomita dunalii (Joly) Diesing
- ISOMERIA Chevallier
- Isomeria lyngbyei Chevallier
- ISONEMA Schuster, Goldstein, & Hershenov
- Isonema nigricans Schuster, Goldstein, & Hershenov
- ISOPHLIS Rafinesque
- Isophlis concentrica ('concentricus') Rafinesque \{pcs\}
- ISOPTERA Okamura
- Isoptera regularis Okamura
- ISOSELMIS Butcher
- Isoselmis obconica Butcher
- Issinella grandis Tchuvashov
- Issinella sainsii Mamet & Roux
- ISTHMIA C. Agardh
- Isthmia africana Ehrenberg (CAS)
- Isthmia capensis Grunow (CAS)
- Isthmia capensis Grunow
- Isthmia catenata Meneghini
- Isthmia domuslaterariae Reinhold (CAS)
- Isthmia enervis Ehrenberg
- Isthmia enervis var. capensis Grunow
- Isthmia enervis var. gracilis Ehrenberg (CAS)
- Isthmia enervis f. intermedia Grunow (CAS)
- Isthmia enervis var. japonica Castracane (CAS)
- Isthmia enervis var. schmidtii Heiden
- Isthmia enervis [beta] subcylindrica Ralfs
- Isthmia filiformis (Ehrenberg) Meneghini
- Isthmia fortii Forti & Schulz (CAS)
- Isthmia japonica (Castracane) Sournia (CAS)
- Isthmia lindigiana Grunow & Eulenstein
- Isthmia membranacea Cleve (CAS)
- Isthmia minima Harvey & Bailey
- Isthmia nankoorensis Grunow
- Isthmia nervosa Kützing
- Isthmia nervosa var. nankoorensis Grunow (CAS)
- Isthmia obliquata (J. E. Smith) C. Agardh (CAS)
- Isthmia obliquata [beta] tenuior C. Agardh
- Isthmia polymorpha Montagne
- Isthmia polymorpha Montagne {cont}
- Isthmia polymorpha Montagne ms.
- Isthmia reticularis J. Brun
- Isthmia squinaboli (Forti) Forti
- Isthmia squinaboli var. crassior Forti
- Isthmia squinabolii var. crassior Forti
- Isthmia stomatophora (Turpin) Meneghini
- Isthmia szaboi_('szabói') Pantocsek
- Isthmia tenuicornis Grunow
- Isthmia vertebrata (Brébisson) Meneghini
- Isthmia vesiculosa (C. Agardh) C. Agardh (CAS)
- Isthmia vitrea Kitton (CAS)
- ISTHMIELLA Cleve
- Isthmiella enervis (Ehrenberg) Cleve (CAS)
- ISTHMOCHLORON Skuja
- ISTHMOCHLORON (Skuja) Bourrelly \{also on card: sect. of Pseudostaurastrum\}
- Isthmochloron gracile (Reinsch) Skuja
- Isthmochloron gracile f. reductum Skuja
- Isthmochloron lobulatum (Nägeli) Skuja
- Isthmochloron subtetraëdricum (Reinsch) Skuja
- Isthmochloron trispinatum (W. West & G.S. West) Skuja
- ISTHMOLITHUS Deflandre
- Isthmolithus claviformis Brönnimann & Stradner
- Isthmolithus recurvus Deflandre
- Isthmolithus triplus Levin & Joerger
- Isthmolithus unipons Bramlette & Sullivan
- ISTHMOPLEA Kjellman
- Isthmoplea rupincola Foslie
- Isthmoplea sphaerophora (Carmichael) Gobi
- ISTHMOSIRA Kützing
- Isthmosira excavata (Ralfs) Kützing
- Isthmosira filiformis (Ehrenberg) Kützing
- Isthmosira vertebrata (Brébisson) Kützing
- ISYMENIA J. Agardh \{also on card: subgenus of Halymenia\}
- ISYMENIA (J. Agardh) J. Agardh
- Isymenia angusta J. Agardh
- Isymenia decipiens (J. Agardh) J. Agardh
- Isymenia elongata (C. Agardh) J. Agardh
- Isymenia flabellata J. Agardh
- Isymenia trigona (J. Agardh) J. Agardh
- ITIERIA Saporta
- ITONOA M. Masuda & M.D. Guiry
- Itonoa marginifera (J. Agardh) M. Masuda & M.D. Guiry
- ITTIACANTHE Donati
- IVANOVIA Khvorova
- Ivanovia tenuissima Khvorova
- IWANOFFIA Pascher
- IWANOFFIA Pascher mscr. \{also on card: Subgenus of Stigeoclonium\}
- IWANOFFIA Pascher
- Iwanoffia terrestris (Ivanov) Pascher
- IYENGARIA Børgesen
- Iyengaria stellata (Børgesen) Børgesen
- IYENGARIELLA Desikachary
- Iyengariella endolithica J. S. Seeler & S. Golubic
- Iyengariella tirupatiensis Desikachary
- IYENGARIOMONAS Desikachary
- Iyengariomonas loligo (Conrad) Desikachary
- IZHELLA Antropov
- Izhella nubiformis Antropov
- IZZIELLA Doty
- Izziella abbottiae_('abbottae') Doty
- JAAGIA Vischer
- JAAGIA Vischer
- JAAGIA Vischer
- Jaagia aquatica Vischer
- JAAGICHLORELLA Reisigl
- Jaagichlorella geometrica Reisigl
- JAAGIELLA Vischer
- JAAGIELLA Vischer
- Jaagiella alpicola Vischer
- JACUTIELLA Korde
- Jacutiella aciculata (Korde) Korde
- JAKOBA D.J. Patterson
- Jakoba echidna C.J. O'Kelly
- Jakoba libera (J. Ruinen) D.J. Patterson
- JANCZEWSKIA Solms-Laubach
- JANCZEWSKIA \{also on card: section Heterojanczewskia Setchell\}
- JANCZEWSKIA \{also on card: sect. Stipitijancewskia (sic) C. F. Chang & M. Xia\}
- Janczewskia gardneri Setchell & Guernsey
- Janczewskia hawaiiana Apt
- Janczewskia lappacea Setchell
- Janczewskia meridionalis Martin & Pocock
- Janczewskia moriformis Setchell
- Janczewskia morimotoi Tokida
- Janczewskia ramiformis C. F. Chang & B. M. Xia
- Janczewskia solmsii Setchell & Guernsey
- Janczewskia tasmanica Falkenberg
- Janczewskia teysmannii Weber Bosse
- Janczewskia tokidae Saito
- Janczewskia verruciformis ('verrucaeformis') Solms-Laubach
- JANETOSPHAERA Shaw
- JANETOSPHAERA (Shaw) Printz \{also on card: sect. of Volvox\}
- Janetosphaera aurea (Ehrenberg) Shaw
- JANIA Lamouroux
- JANIA \{also on card: section Haliptylon Decaisne\}
- JANIA (Lamouroux) Kützing \{also on card: subgenus of Corallina\}
- JANIA \{also on card: sections Haliptilon [Decaisne], Janira Harvey\}
- JANIA \{also on card: section Jania (Lamouroux) Endlicher\}
- JANIA (Lamouroux) Endlicher \{also on card: section of Jania\}
- Jania adhaerens Lamouroux
- Jania affinis Harvey
- Jania alasaniensis Maslov
- Jania antennina Kützing
- Jania arborescens (Yendo) Yendo
- Jania capillacea Harvey
- Jania comosa Crouan fr.
- Jania compressa Lamouroux
- Jania corniculata (Ell. & Sol.) Lamouroux
- Jania corniculata var. minima Lamouroux
- Jania corniculata var. nitidula Meslin
- Jania crassa Lamouroux
- Jania crispata (Lamouroux) Decaisne
- Jania cristata (L.) Endlicher
- Jania cubensis Montagne ex Kützing
- Jania cuvieri (Lamouroux) Decaisne
- Jania cuvieri Decaisne
- Jania cuvieri var. natalensis 'Harvey'
- Jania decussatodichotoma ('decussato-dichotoma') (Yendo) Yendo
- Jania dercourtii ('dercourti') Johnson
- Jania digitata Manza
- Jania elegans Decaisne
- Jania elegans Lenormand in herb.
- Jania fastigiata Harvey
- Jania gibbosa Lamouroux
- Jania gracilis Zanardini
- Jania gracilis Zanardini
- Jania gracilis (Lamouroux) Montagne
- Jania granifera (Ell. & Sol.) Decaisne
- Jania guamensis J. H. Johnson
- Jania hombronii Montagne
- Jania huertae Chávez
- Jania intermedia (Kützing) Isaac
- Jania intermedia (Kützing) P.C. Silva
- Jania iyengarii Ganesan
- Jania kuboiensis Ishijima
- Jania lemoinei ('lemoini') Ishijima
- Jania lobata Zanardini
- Jania longiarthra Dawson
- Jania longifurca Zanardini
- Jania longifurca Zanardini
- Jania mayei Johnson
- Jania mengaudii ('mengaudi') Me. Lemoine
- Jania mexicana Taylor
- Jania micrarthrodia Lamouroux
- Jania micrarthrodia f. antennina (Kützing) Yendo
- Jania micrarthrodia var. tenuissima (Sonder) Sonder
- Jania miocenica J. H. Johnson
- Jania natalensis Harvey
- Jania natalensis var. tenuior [Harvey]
- Jania natalensis var. tenuior Harvey ex Durairatnam
- Jania nipponica (Yendo) Yendo
- Jania nitidula Meslin
- Jania novae-zelandiae Harvey
- Jania novae-zelandiae var. longiarticulata Harvey
- Jania nummulitica Me. Lemoine
- Jania occidentalis Johnson & Kaska
- Jania pacifica Areschoug
- Jania paniculata (Lamouroux) Decaisne
- Jania parvula Zanardini
- Jania pedunculata Lamouroux
- Jania pistillaris Montagne
- Jania plumula Zanardini
- Jania prolifera Joly
- Jania pumila Lamouroux
- Jania purpurata (Lamarck) Blainville
- Jania pusilla (Sonder) Yendo
- Jania pygmaea Lamouroux
- Jania radiata (Yendo) Yendo
- Jania robusta Dawson, inval.
- Jania rosea (Lamarck) Decaisne
- Jania rosea Decaisne
- Jania rubens (L.) Lamouroux
- Jania rubens var. africana Lamouroux
- Jania rubens Lamouroux [zeta] africana [Hering]
- Jania rubens var. americana Lamouroux
- Jania rubens [beta] communis S. F. Gray
- Jania rubens var. concatenata Lamouroux
- Jania rubens var. corniculata (L.) Yendo
- Jania rubens var. cristata (L.) Lamouroux
- Jania rubens var. pyrifera Lamouroux
- Jania rubens [zeta] spermatophoros S.F. Gray
- Jania rubens var. spermophoros (L.) Lamouroux
- Jania rubens var. tenella (Kützing) Piccone
- Jania rubra 'Lamouroux'
- Jania sagittata Blainville
- Jania sanctae-marthae Schnetter
- Jania spermophoros (L.) Kützing
- Jania subpinnata Dawson
- Jania subulata [beta] crispata (Lamouroux) Harvey
- Jania subulata (Ell. & Sol.) Sonder
- Jania tenella (Kützing) Grunow
- Jania tenella var. zacae Dawson
- Jania tenuissima Sonder
- Jania toltrica Maslov
- Jania ucrainica Maslov
- Jania ungulata (Yendo) Yendo
- Jania ungulata f. brevior (Yendo) Yendo
- Jania ungulata var. brevior (Yendo) Cordero
- Jania verrucosa Lamouroux
- Jania vetus Johnson
- Jania virgata (Zanardini) Montagne
- Jania wassoevicii Maslov
- Jania yenoshimensis (Yendo) Yendo
- JANICKIELLA Duboscq & Grassé
- Janickiella grassii Duboscq & Grassé
- JANICKINA Chatton
- Janickina chaetognathi (Grassi) Chatton
- Janickina pigmentifera (Grassi) Chatton
- Janischia antiqua Grunow
- JANSAELLA Mamet & Roux
- Jansaella ridingii ('ridingi') Mamet & Roux \{rodingii?\}
- JANSONIA S. A. J. Pocock
- Jansonia jurassica S. A. J. Pocock
- JANTINELLA Kylin
- Jantinella sinicola (Setchell & Gardner) Kylin
- Jantinella verruciformis ('verrucaeformis') (Setchell & McFadden) Kylin
- JAOA Fan
- Jaoa bullata (Jao) Fan
- Jaoa prasina (Jao) Fan
- JAONIELLA Skvortsov
- Jaoniella planctonica Skvortsov
- JAOSACCION van den Hoek
- Jaosaccion endophytum (Möbius) van den Hoek
- Jaosaccion prasinum (Jao) van den Hoek
- JATULIANA Korde
- Jatuliana furcata Korde
- JEANNERETTIA Hooker f. & Harvey
- Jeannerettia crenata (J. Agardh) Papenfuss
- Jeannerettia crispata (Zanardini) Papenfuss
- Jeannerettia frondosa Harvey
- Jeannerettia latifolia Kützing
- Jeannerettia lobata Hooker f. & Harvey
- Jeannerettia nana (J. Agardh) Papenfuss
- Jeannerettia pedicellata (Harvey) Papenfuss
- JENNINGSIA Schaeffer
- JOCULATOR Manza
- Joculator delicatulus Doty
- Joculator maximus (Yendo) Manza
- Joculator pinnatifolius Manza
- JODOMONAS Penso
- Jodomonas agilis Penso
- JODOTELLA L. Morellet & J. Morellet
- Jodotella veslensis L. Morellet & J. Morellet
- JOENIA Grassi
- Joenia annectens Grassi
- JOENINA Grassi
- Joenina pulchella Grassi
- JOENOIDES Grassé
- JOENOPSIS Cutler
- Joenopsis cephalotricha Cutler
- Joenopsis polytricha Cutler
- JOHANNESBAPTISTIA De Toni f.
- Johannesbaptistia gardneri Frémy
- Johannesbaptistia pellucida (Dickie) W.R. Taylor & F. Drouet
- Johannesbaptistia primaria (Gardner) De Toni f.
- Johannesbaptistia whitfordii Thomas & Gonzalves
- Johannesbaptistia willei (Gardner) De Toni f.
- JOHNSONIA Korde
- Johnsonia spinosa Korde
- JOHNSON-SEA-LINKIA Eiseman & Earle
- Johnson-sea-linkia profunda N.J. Eiseman & S.A. Earle
- Johnstonia lacustris (Carmichael) Trevisan
- JOLYA Skvortsov & Noda
- Jolya planctonica Skvortsov & Nova
- JOLYELLA Ruinen
- Jolyella bumbungensis Ruinen
- Jolyella indica Ruinen
- JOLYNA Guimaraes
- Jolyna laminarioides Guimaraes
- JOMONLITHUS Inouye & Chihara
- Jomonlithus littoralis Inouye & Chihara
- JONSSONIA S. Lund
- Jonssonia pulvinata S. Lund
- JOUSEA Gleser
- Jousea elliptica (Jousé) Gleser (CAS)
- JUERGENSIA ('JÜRGENSIA') Reichenbach
- JUERGENSIA ('JÜRGENSIA') Reichenbach
- JUGALIS Schrank
- Jugalis lemnophila Schrank
- Jugalis physicorum Schrank
- Jugalis porticalis (Müller) Schrank
- Jugalis princeps (Vaucher) Schrank
- JUGUSPIRA Crow
- JULESCRANEIA Parker & Dawson
- Julescraneia grandicornis Parker & Dawson
- JULOGONATOS Targioni-Tozzetti
- JURANYIELLA Hortobágyi
- Juranyiella javorkae (Hortobágyi) Hortobágyi
- Juranyiella javorkae f. deflexa Hortobágyi
- JURUSANIA Krylov
- Jurusania burrensis Preiss
- JUSELLA Vozzhennikova
- Jusella crebraporosa Vozzhennikova
- Jusella denticulata Vozzhennikova
- Jusella rariporosa Vozzhennikova
- KADVOYA Korde
- Kadvoya mirabilis Korde
- KAKABEKIA Barghoorn
- Kakabekia flabelliformis P.K. Maithy
- Kakabekia rarea P.K. Maithy
- Kakabekia umbellata Barghoorn
- KALIDIOPHORA J. Agardh
- KALIFORMIA Stackhouse
- Kaliformia diaphana ([Esper]) Stackhouse \{also on card, above [Esper]: "Turn."\}
- Kaliformia filiformis ("Turn.") Stackhouse
- Kaliformia opuntia (Good. & Woodw.) Stackhouse
- Kaliformia pusilla (Stackhouse) Stackhouse
- Kaliformia verticillata (Lightfoot) Stackhouse
- KALIFORMIS Stackhouse
- Kaliformis articulatus (Hudson) Stackhouse
- Kaliformis clavellosus (Lightf. ex Turner) Stackhouse
- Kaliformis dasyphyllus (Woodw.) Stackhouse
- Kaliformis obtusus (Hudson) Stackhouse
- Kaliformis opuntia (Good. & Woodw.) Stackhouse
- Kaliformis verticillatus (Lightf.) Stackhouse
- KALLONEMA G. Dickie
- Kallonema caespitosum G. Dickie
- Kallonema obscurum G. Dickie
- Kallonema pellucidun G. Dickie
- Kallonema ralfsii (Harvey) G. Dickie
- KALLOSPHAERIDIUM De Coninck
- Kallosphaeridium brevibarbatum De Coninck
- Kallosphaeridium curiosum J.P. Bujak
- KALLYMEMA 'J. Agardh' \{also on card: [= Kallymenia J. Agardh 1842]\}
- KALLYMENA 'J. Agardh'
- KALLYMENIA {info}
- KALLYMENIA J. Agardh
- KALLYMENIA \{also on card: 3 subgenera by J. Agardh\}
- KALLYMENIA (J. Agardh) Endlicher \{also on card: [Section of] Kallymenia\}
- KALLYMENIA \{also on card: section Constantinea (Post. & Ruprecht) Endlicher\}
- KALLYMENIA J. Agardh orth. mut. Harvey
- KALLYMENIA \{also on card: 3 subgenera or sections by J. Agardh\}
- Kallymenia agardhii R.E. Norris
- Kallymenia angustata Setchell & Gardner
- Kallymenia antarctica Hariot
- Kallymenia baldwinii Dawson
- Kallymenia balearica Rodrígues & Femenías
- Kallymenia berggrenii ('Berggreni') J. Agardh
- Kallymenia bleckii Dawson
- Kallymenia californica Farlow
- Kallymenia callophylloides Okamura & Segawa
- Kallymenia capensis (Kützing) J. Agardh
- Kallymenia chilensis Levring
- Kallymenia crassiuscula Okamura
- Kallymenia cribrogloea Womersley & R. E. Norris
- Kallymenia cribrosa Harvey
- Kallymenia demissa J. Agardh
- Kallymenia dentata (Suhr) J. Agardh
- Kallymenia dentata f. laciniata J. Agardh
- Kallymenia dentata f. prolifera J. Agardh
- Kallymenia digitata J. Agardh
- Kallymenia digitata (J. Agardh) Kylin
- Kallymenia dubyi (Chauv.) Harvey
- Kallymenia elegans Meneghini
- Kallymenia exasperata Zanardini
- Kallymenia feldmannii Codomier
- Kallymenia feldmannii Codomier
- Kallymenia gelatinosa Seoane-Camba, inval.
- Kallymenia gmelinii ('Gmelini') Grunow
- Kallymenia guaymasensis Dawson
- Kallymenia harveyana J. Agardh
- Kallymenia harveyana J. Agardh
- Kallymenia integra Kjellman
- Kallymenia lacerata J. Feldmann
- Kallymenia lacinifolia Levring
- Kallymenia lactuca 'J. Agardh'
- Kallymenia lactuca (C. Agardh) Rabenhorst
- Kallymenia larterae ('larteriae') E. M. Holmes
- Kallymenia latiloba Taylor
- Kallymenia limminghei ('limminghii') Montagne
- Kallymenia lubrica (Suhr) Barton
- Kallymenia lubrica Rodríguez y Femenías in herb. Thuret
- Kallymenia maculata Weber Bosse
- Kallymenia magontana Rodríguez y Femenías in herb. Thuret
- Kallymenia microphylla J. Agardh
- Kallymenia mollis J. Feldmann
- Kallymenia morelii (Montagne & Millardet) Børgesen
- Kallymenia multifida Reinsch
- Kallymenia multiloba Taylor
- Kallymenia nana Tisdall
- Kallymenia nana (J. Agardh) Tisdall
- Kallymenia nitophylloides J. Agardh
- Kallymenia norrisii Hollenberg & Abbott
- Kallymenia oblongifructa (Setchell) Setchell
- Kallymenia oligonema Yamada
- Kallymenia ornata (Postels & Ruprecht) J. Agardh
- Kallymenia pacifica Kylin
- Kallymenia papenfussii R. E. Norris
- Kallymenia papulosa Montagne
- Kallymenia patens (J. Agardh) Codomier
- Kallymenia patens (J. Agardh) Codomier ex Parkinson
- Kallymenia pennyi Harvey
- Kallymenia perforata J. Agardh
- Kallymenia pertusa Setchell & Gardner
- Kallymenia phyllophora J. Agardh
- Kallymenia phyllophora f. orbicularis Setchell & Gardner
- Kallymenia phyllophora f. typica Setchell & Gardner
- Kallymenia polycoelioides J. Agardh
- Kallymenia polyides (J. Agardh) J. Agardh
- Kallymenia purpurea Rodríguez & Femenías in herb. Thuret
- Kallymenia pustulosa (Postels & Ruprecht) Setchell & Gardner
- Kallymenia reniformis (Turner) J. Agardh
- Kallymenia reniformis [var.] cuneata J. Agardh
- Kallymenia reniformis f. cuneata (J. Agardh) E. S. Sinova
- Kallymenia reniformis var. ferrarii J. Agardh
- Kallymenia reniformis f. ferrarii ('ferrari') (J. Agardh) E. S. Sinova
- Kallymenia reniformis var. microcarpa Ardissone
- Kallymenia reniformis var. undulata J. Agardh
- Kallymenia reptans (Suhr) Barton
- Kallymenia requienii (J. Agardh) J. Agardh
- Kallymenia requienii var. indica Weber Bosse
- Kallymenia rigida J. Feldmann
- Kallymenia rosacea (J. Agardh) J. Agardh
- Kallymenia rosa-marina ('rosa marina') (Gmelin) Endlicher
- Kallymenia rosea Womersley & R. E. Norris
- Kallymenia rubra Womersley & R. E. Norris
- Kallymenia sagamiana Yamada
- Kallymenia sanguinea Montagne
- Kallymenia sanguinea Schmitz
- Kallymenia schizophylla J. Agardh
- Kallymenia septentrionalis Kjellman
- Kallymenia sessilis Okamura
- Kallymenia setchellii Taylor
- Kallymenia sitchensis (Postels & Ruprecht) Endlicher
- Kallymenia spathulata (J. Agardh) Codomier
- Kallymenia spathulata (J. Agardh) Codomier ex Parkinson
- Kallymenia spinosa Womersley & R. E. Norris
- Kallymenia stipitata Okamura
- Kallymenia tasmanica Harvey
- Kallymenia tasmanica var. laciniata J. Agardh
- Kallymenia tenuifolia Rodriguez mscr.
- Kallymenia tenuifolia Taylor
- Kallymenia veleroae Dawson
- Kallymenia vulgaris Meneghini
- Kallymenia westii Ganesan
- Kallymenia wilkesii Harvey & Bailey
- KALLYMENIOPSIS Perestenko
- Kallymeniopsis circinnata Perestenko
- Kallymeniopsis lacera (Postels & Ruprecht) Perestenko
- Kallymeniopsis oblongifructa (Setchell) G.I. Hansen
- Kallymeniopsis verrucosa A. Zinova & Gussarova \{also on card: [Gusarova]\}
- KALYMENIA \{also on card: see Kallymenia\}
- KALYPTEA Cookson & Eisenack
- Kalyptea aceras Manum & Cookson
- Kallymeniopsis pustulosa (Postels & Ruprecht) Perestenko
- KALODICTYON Wolle
- Kalyptea diceras Cookson & Eisenack
- Kalodictyon margaritatum Wolle
- KALYMENIA 'J. Agardh'
- Kalyptea glabra (Cookson & Eisenack) V. D. Wiggins
- Kalyptea indica K.P. Jain & H.K. Maheshwari
- Kalyptea jurassica Alberti
- Kalyptea monoceras Cookson & Eisenack
- Kalyptea stegasta (Sarjeant) V. D. Wiggins
- Kalyptea trinetron (Sarjeant) V. D. Wiggins
- KAMAENA Antropov
- Kamaena awirsii ('awirsi') Mamet & Roux
- Kamaena delicata Antropov
- Kamaena itkillikensis Mamet & Rudloff
- Kamaena maclarenii ('maclareni') Mamet & Rudloff
- Kamaena pirletii ('pirleti') Mamet & Roux
- Kamaena tenuis (von Möller) Petryk & Mamet
- Kamaena tenuisepta Mamet & Rudloff
- KAMAENELLA Mamet & Roux
- Kamaenella denbighi Mamet & Roux
- Kamaenella tenuis (von Möller) Mamet & Roux
- KAMERA D.J. Patterson & M. Zölffel
- KAMPTNERIUS Deflandre
- Kamptnerius granatus N. Hoffmann
- Kamptnerius magnificus Deflandre
- Kamptnerius magnificus subsp. sculptus Bukry
- Kamptnerius minimus Reinhardt
- Kamptnerius percivalii Bukry
- Kamptnerius pertusus Forchheimer
- Kamptnerius tabulatus Perch-Nielsen
- KAMPYLOPTER Pochmann \{also on card: section of Phacus\}
- KANSODINIUM S. Carty & Elenor R. Cox
- Kansodinium ambiguum (Thompson) Carty & Elenor Cox
- KANTA Adanson
- KANTIA Pia
- Kantia hexaster Pia
- Kantia dolomitica Pia
- Kantia philosophi Pia
- KANTIOPORELLA Janchen
- Kantioporella dolomitica (Pia) Janchen
- Kantioporella hexaster (Pia) Janchen
- Kantioporella philosophi (Pia) Janchen
- KAPPAPHYCUS M.S. Doty
- Kappaphycus alvarezii (M.S. Doty) M.S. Doty
- Kappaphycus alvarezii (M.S. Doty) M.S. Doty ex P.C. Silva
- Kappaphycus cottonii (Weber Bosse) M.S. Doty
- Kappaphycus cottonii (A. Weber Bosse) M.S. Doty ex P. C. Silva
- Kappaphycus inermis_('inerme') (F. Schmitz) M.S. Doty
- Kappaphycus inermis_('inerme') (F. Schmitz) M.S. Doty ex P.C. Silva
- Kappaphycus procrusteanus_('procrusteanum') (G.T. Kraft) M.S. Doty
- Kappaphycus striatus_('striatum') (F. Schmitz) M.S. Doty
- Kappaphycus striatus_('striatum') (F. Schmitz) M.S. Doty ex P.C.
- KARAYEVIA F.E. Round & L. Bukhtiyarova
- Karayevia clevei (Grunow) F.E. Round & L. Bukhtiyarova
- Karayevia laterostrata (Hustedt) F.E. Round & L. Bukhtiyarova
- KARELIANA Korde
- Kareliana zonata Korde
- KAROTOMORPHA Travis
- Karotomorpha bufonis (Dobell) Travis
- Karotomorpha swezyi ('swezi') (Grassé) Travis
- KARPATHIA Maslov
- Karpathia sphaerocellulosa Maslov
- KARPINSKYA Croft \{also on card: subgenus of Trochiliscus\}
- KARPINSKYA (Croft) Grambast
- Karpinskya bilineata (Peck) Peck & Morales
- Karpinskya laticostata (Peck) Grambast
- KARRERIA Munier-Chalmas \{also on card: Subgenus of Cymopolia\}
- KARRERIA Munier-Chalmas ex L. Morellet & J. Morellet \{also on card: sect. of Cymopolia\}
- KARRERIA (Munier-Chalmas ex L. Morellet & J. Morellet) Pia
- Karreria elegans Munier-Chalmas mss. in coll. Bornet
- Karreria zittelii ('zitteli') Munier-Chalmas mss. in coll. Steinmann
- Karreria zittelii ('zitteli') (L. Morellet & J. Morellet) Pia
- Katablepharis notonectoides Skuja
- Katablepharis oblonga Skuja
- Katablepharis ovalis Skuja
- KATAGNYMENE Lemmermann
- Katagnymene bergii Kiselev
- Katagnymene maharashtrensis Ashtekar & Kamat
- Katagnymene palustris G. S. West
- Katagnymene pelagica Lemmermann
- Katagnymene pelagica var. major Wille
- Katagnymene spiralis Lemmermann
- Katagnymene spiralis var. capitata (West fil.) Wille
- KATAHIRAIA S. Komura
- Katahiraia aspera S. Komura
- Katahiraia oblonga S. Komura
- Katahiraia pauperata S. Komura
- KATANGASIA Maslov
- Katangasia samoilovii ('samoilovi') Maslov
- Katangasia sibirica Maslov
- KATAVELLA Tchuvashov
- KATAVELLA Tchuvashov
- Katavella orlovkaensis Tchuvashov
- Katavella orlovkensis Tchuvashov
- KATAVIA Krylov
- Katavia costata Preiss
- KATHABLEPHARIS Skuja
- Kathablepharis hyalurus Skuja
- Kathablepharis phoenikoston Skuja
- KATODINIUM Fott
- Katodinium asymmetricum ('assymetricum') (Massart) Fott
- Katodinium asymmetricum (Massart) Loeblich III
- Katodinium astigmatum Christen
- Katodinium austriacum (Schiller) Fott
- Katodinium austriacum (Schiller) Loeblich III
- Katodinium campylops (T. M. Harris) Fott
- Katodinium campylops (Harris) Loeblich III
- Katodinium crassifilum (Schiller) Fott
- Katodinium crassifilum (Schiller) Loeblich III
- Katodinium dorsalosulcum Hulburt
- Katodinium dorsalisulcum Hulburt, McLaughlin, & Zahl
- Katodinium edax (Schiller) Fott
- Katodinium edax (Schiller) Loeblich III
- Katodinium fontinale_('fontinalis') C.E.M. Bicudo & Skvortzov
- Katodinium fungiforme (Anissimowa) Fott
- Katodinium fungiforme (Anisimova) Loeblich III
- Katodinium galeatum ('galeata') (Conrad) Hulburt, McLaughlin, & Zahl
- Katodinium galeatum (Conrad) Loeblich III
- Katodinium glandula (Herdman) Fott
- Katodinium glandula_('glandulum') (Herdman) Loeblich III
- Katodinium glaucum (Lebour) Fott
- Katodinium glaucum (Lebour) Loeblich III
- Katodinium hiemale (Schiller) Fott
- Katodinium hiemale_('hiemalis') (Schiller) Loeblich III
- Katodinium hyperxanthoides (T. M. Harris) Fott
- Katodinium hyperxanthoides (Harris) Loeblich III
- Katodinium hyperxanthum (T. M. Harris) Fott
- Katodinium hyperxanthum (Harris) Loeblich III
- Katodinium intermedium Christen
- Katodinium mazuricum Javornicky
- Katodinium minutum (Lebour) Sournia
- Katodinium molopicum (T. M. Harris) Fott
- Katodinium molopicum (Harris) Loeblich III
- Katodinium monadicum (Perty) Javornicky
- Katodinium montanum (Schiller) Christen
- Katodinium montanum (Schiller) Loeblich III
- Katodinium musei (Danysz) Fott
- Katodinium musei_('musaei') (Danysz) Loeblich III
- Katodinium nieuportense ('nieuportensis') (Conrad) Fott
- Katodinium nieuportense ('nieuportensis') (Conrad) Loeblich Jr. & Loeblich III
- Katodinium notatum (Skuja) Christen
- Katodinium piscinale Fott
- Katodinium planum (Fott) Fott
- Katodinium planum (Fott) Loeblich III
- Katodinium polyplastidum Popovsky
- Katodinium pratense (Baumeister) Christen
- Katodinium pratense ('pratensis') (Baumeister) Loeblich III
- Katodinium ptyrticum (T. M. Harris) Fott
- Katodinium ptyrticum (Harris) Loeblich III
- Katodinium redekei (Conrad & Kufferath) Loeblich III
- Katodinium rotundatum (Lohmann) Fott
- Katodinium rotundatum (Lohmann) Loeblich III
- Katodinium rotundatum var. conradii ('conradi') (Kufferath) Hulburt, McLaughlin, & Zahl
- Katodinium rotundatum var. conradii (Kufferath) Loeblich III
- Katodinium ruppiae (Conrad) Fott
- Katodinium ruppiae (Conrad) Loeblich III
- Katodinium sanctipaulense C. Bicudo & Skvortsov
- Katodinium schilleri ('Schillerii') (Woloszynska) Fott
- Katodinium schilleri (Woloszynska) Loeblich III
- Katodinium simile Christen
- Katodinium spirodinioides Christen
- Katodinium stigmaticum (Lindemann) Fott
- Katodinium stigmaticum (Lindemann) Loeblich III
- Katodinium tetragonops (T. M. Harris) Fott
- Katodinium tetragonops (Harris) Loeblich III
- Katodinium thiophila (Conrad) Hulburt, McLaughlin, & Zahl
- Katodinium thiophilum (Conrad) Loeblich III
- Katodinium uncinatum ('uncinata') (Kufferath) Hulburt, McLaughlin, & Zahl
- Katodinium uncinatum (Conrad & Kufferath) Loeblich III
- Katodinium vernale Christen
- Katodinium vierae Javornicky
- Katodinium viride Christen
- Katodinium vorticella (Stein) Fott
- Katodinium vorticella_('vorticellum') (Stein) A.R. Loeblich III
- Katodinium woloszynskae (Schiller) Fott
- Katodinium woloszynskae (Schiller) Loeblich III
- Katodinium woloszynskae var. notatum ('notata') (Skuja) Loeblich
- KAZAKHSTANELIA Korde
- Kazakhstanelia multiforma Korde
- Kazakhstanelia ramosa Korde
- Kazakhstanelia vesiculosiformis ('vesiculosaformis') Korde
- Kentrosiga echina S.M. Tong
- Kentrosiga setifera J. Schiller
- Kentrosiga skujae J. Schiller
- Kentrosiga thienemannii J. Schiller
- KENTROSPHAERA Volkens
- KENTROSPHAERA Borzì
- Kentrosphaera antarctica Kol
- Kentrosphaera appendiculata Korshikov
- Kentrosphaera austriaca M. Puncochárová
- Kentrosphaera bristoliae_('bristolae') G.M. Smith
- Kentrosphaera facciolae_('Facciolaae') Borzě
- KECKIA E. F. Glocker
- Keckia annulata Glocker
- Keckia antiqua Heer
- Keckia fischeri (Heer) Rothpletz
- KEEGA Wray
- Keega australis_('australe') Wray
- KENELLA Korde
- Kenella ornata Korde
- KENLEYIA Cookson & Eisenack
- Kenleyia essentialis_('essentiale') (De Coninck) Stover & Evitt
- Kenleyia fimbriata Cookson & Eisenack
- Kenleyia leptocerata Cookson & Eisenack
- Kenleyia lophophora Cookson & Eisenack
- Kenleyia nuda De Coninck
- Kenleyia pachycerata Cookson & Eisenack
- KENTIA J. Schiller
- Kentia ovalis J. Schiller
- Kentia pyriformis J. Schiller
- Kentia sphaeroidea J. Schiller
- KENTRODISCUS Pantocsek
- KENTRODISCUS J. Pantocsek
- Kentrodiscus aculeatus Hanna
- Kentrodiscus andersonii ('andersoni') Hanna
- Kentrodiscus armatus Hajós
- Kentrodiscus blandus Long, Fuge, & Smith
- Kentrodiscus fortii Deflandre & Rampi
- Kentrodiscus fossilis Pantocsek
- Kentrodiscus russicus Pantocsek
- KENTROSIGA J. Schiller
- Kentrosiga cylindrica J. Schiller
- Kentrosphaera facciolae f. magna Hansgirg
- Kentrosphaera facciolae var. minor Skvortsov
- Kentrosphaera gibberosa D.G. Vodenic\*varov & Benderliev
- Kentrosphaera gibberosa var. polymorpha M. Puncochárová
- Kentrosphaera gloeophila (Bohlin) Brunnthaler
- Kentrosphaera grandis_('grande') (Bristol) G.M. Smith
- Kentrosphaera lemnae M. Puncochárová
- Kentrosphaera minor Borzì
- Kentrosphaera willei Reichardt
- KEPHYRION Pascher
- Kephyrion aestivum Skvortsov
- Kephyrion amphorula Conrad
- Kephyrion ampulla (Skuja) Bourrelly
- Kephyrion annulatum de Graaf
- Kephyrion asperum_('asper') (Lackey) Bourrelly
- Kephyrion autumnale Skvortsov
- Kephyrion bacilliforme Conrad
- Kephyrion blatnense (Fott) Fott
- Kephyrion boreale Skuja
- Kephyrion brunneum Skvortsov
- Kephyrion campanuliforme Conrad
- Kephyrion campanuliforme Khmeleva
- Kephyrion cinctum (Lackey) Bourrelly
- Kephyrion circumvallatum (Schiller) Bourrelly
- Kephyrion colliferum de Graaf
- Kephyrion cupuliforme Conrad
- Kephyrion cylindricum ('cylindrica') (Lackey) Conrad
- Kephyrion cylindricum var. fluctuosum Hortobágyi
- Kephyrion densatum (G. Schmid) Bourrelly
- Kephyrion doliolum Conrad
- Kephyrion formosissimum (Conrad) Fott
- Kephyrion francevi Guseva
- Kephyrion globosum (Czosnowski) Bourrelly
- Kephyrion helix Conrad mscr.
- Kephyrion hemisphaericum ('hemisphaerica') (Lackey) Conrad
- Kephyrion heverlense ('heverlensis') (Conrad) Fott
- Kephyrion hilliardii Nicholls
- Kephyrion hispidum Skvortsov
- Kephyrion impletum Nygaard
- Kephyrion inconstans (G. Schmid) Bourrelly
- Kephyrion laticollis (Conrad) Bourrelly
- Kephyrion latum Skvortsov
- Kephyrion littorale J.W.G. Lund
- Kephyrion mastigophorum Gerlinde Schmid
- Kephyrion matvienkoae_('matvienkoi') Skvortzov
- Kephyrion moniliferum (G. Schmid) Bourrelly
- Kephyrion mosquense ('mosquensis') Guseva
- Kephyrion obliquum Hilliard
- Kephyrion ovale (Lackey) Huber-Pestalozzi
- Kephyrion ovale var. fluctuosum Hortobágyi
- Kephyrion ovoides (Conrad) Fott
- Kephyrion ovum Pascher
- Kephyrion parvulum (G. Schmid) Bourrelly
- Kephyrion petasatum Conrad
- Kephyrion planktonicum Hilliard
- Kephyrion poculum (Conrad) Fott
- Kephyrion prismaticum Conrad
- Kephyrion rubri-claustri Conrad
- Kephyrion rubri-claustri var. amphora (Lackey) Conrad
- Kephyrion rubri-claustri var. valkanovii (Huber-Pestalozzi) L. S. Péterfi
- Kephyrion schmidii Bourrelly
- Kephyrion sitta Pascher
- Kephyrion skujae Ettl
- Kephyrion spinosum Hada
- Kephyrion spirale (Lackey) Conrad
- Kephyrion starmachii (Czosnowski) Bourrelly
- Kephyrion translucens Fott
- Kephyrion truncatum Skvortsov
- Kephyrion tubiforme Fott
- Kephyrion valkanovii ('Valkanovi') Huber-Pestalozzi
- Kephyrion velatum Conrad
- KEPHYRIOPSIS Pascher & Ruttner
- Kephyriopsis cincta Schiller
- Kephyriopsis conica Schiller
- Kephyriopsis cordata Hilliard
- Kephyriopsis crassa Hilliard
- Kephyriopsis cylindrica (Lackey) Fott
- Kephyriopsis elegans Conrad
- Kephyriopsis elegans Hilliard
- Kephyriopsis ellipsoidea Pascher
- Kephyriopsis entzii (Conrad) Fott
- Kephyriopsis globosa Hilliard
- Kephyriopsis gracilis Hilliard
- Kephyriopsis hemisphaerica (Lackey) Fott
- Kephyriopsis heverlensis Conrad
- Kephyriopsis lata Schiller
- Kephyriopsis limnetica Hilliard
- Kephyriopsis ornata Conrad
- Kephyriopsis ovum Pascher & Ruttner
- Kephyriopsis poculum (Conrad) Kristiansen
- Kephyriopsis ruttneri Schiller
- Kephyriopsis sphaerica Hilliard
- Kephyriopsis tatrica Juris
- KEPPENODINIUM Loeblich Jr. & Loeblich III
- Keppenodinium lobatum (J. Cachon) Sournia, J. Cachon, & M. Cachon
- Keppenodinium mycetoides (Cachon) Loeblich Jr. & Loeblich III
- Keppenodinium piriforme (J. Cachon) Sournia, J. Cachon, & M. Cachon
- KERAMION Adanson
- KERATOCOCCUS Pascher
- Keratococcus angulus Pascher
- Keratococcus bicaudatus (A. Braun) J.B. Petersen
- Keratococcus braunii (Nägeli) Hindák
- Keratococcus caudatus (Hansgirg) Pascher
- Keratococcus cylindricus Hindák
- Keratococcus dissociatus (P.A. Verses & F.R. Trainor) H. Ettl & G. Gärtner
- Keratococcus dybowskii Woloszynska
- Keratococcus glareosus Hindák
- Keratococcus lunulatus (Hindák) Hindák
- Keratococcus mucicola (Hustedt) Hindák
- Keratococcus obtusus (Korshikov) Hindák
- Keratococcus rhaphidioides (Hansgirg) Pascher
- Keratococcus sabulosus (Hansgirg) Pascher
- Keratococcus saxatilis (Komárková-Legnerová) Hindák
- Keratococcus sestonicus Hortobágyi
- Keratococcus suecicus Hindák
- KERATOPHORA Pantocsek
- CERATOPHORA 'Pantocsek'
- Ceratophora granulata (Chenevière) Hustedt
- Keratophora nitida Pantocsek
- Ceratophora nuda Meister
- Keratophora robusta Pantocsek
- Keratophora russica (Pantocsek) Pantocsek
- KERIOCHLAMYS Pascher
- Keriochlamys styriaca Pascher
- KERIOSPHAERA Pascher
- Keriosphaera gemma Pascher
- KERKIS R. Gersonde & D.M. Harwood
- Kerkis bispinosa R. Gersonde & D.M. Harwood
- KERMATIA T. Kalina & M. Puncochárová
- Kermatia pupukensis T. Kalina & M. Puncochárová
- KHAWKINEA Jahn & McKibben
- Khawkinea acui Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea acus (Korshikov) Bourrelly
- Khawkinea acuta Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea acutecaudata Skuja
- Khawkinea adautae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea alinii_('alini') Skvortsov & Noda
- Khawkinea aquae-impurae ('aquae impurae') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea bacillariae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea bicudoi Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea bulachii ('bulachi') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea carmenii ('carmeni') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea cipo Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea clavata Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea coffeana Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea conica Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea danielii ('danieli') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea eneydae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea epiphytica Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea fidalgoi Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea frigida Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea fritschii (Pringsheim & Hovasse) Pringsheim
- Khawkinea furtadi Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea guaraci Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea hallii ('halli') Jahn & McKibben
- Khawkinea indianae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea jacira Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea kohlemannii ('kohlemanni') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea kuhlmannii ('kuhlmanni') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea leucops (S. R. Hall) Jahn
- Khawkinea linealis (Pringsheim) Jahn
- Khawkinea longicauda (Skvortsov) Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea mattos Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea montanis Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea muscicola Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea nasuta Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea normae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea novo-mundo ('novo mundo') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea ocellata (Khawkine) Jahn & McKibben
- Khawkinea ohwii Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea ovoado Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea ovoideis Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea pertyi (Pringsheim & Hovasse) Pringsheim
- Khawkinea proxima Skuja
- Khawkinea quartana (Moroff) Jahn
- Khawkinea quartana var. maior Pringsheim
- Khawkinea ranae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea rio-bonito ('rio bonito') Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea serpens (Pringsheim) Pringsheim
- Khawkinea solea (Pringsheim) Pringsheim
- Khawkinea sphagnorum Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea stigmatella (Skvortsov) Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea tatianae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea tatu Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea teixeirae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea terrestris Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea throweri Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea utriculariae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea van-oyei_('van oye') Skvortzov & Noda
- Khawkinea variabilis Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Khawkinea vermae Skvortsov & Noda \{also on card: as subg. of Astasia\}
- Kibonema capitata ('capitatum') Schousboe
- Kibonema corallina Schousboe
- Kibonema globosa Schousboe
- Kibonema pedunculata Schousboe
- Kibonema sphaerica Schousboe
- Kibonema uncifera Schousboe
- KIDOA S. Komura
- Kidoa graviarmata S. Komura
- KIDSTONIELLA Croft & George
- Kidstoniella fritschii ('fritschi') Croft & George
- KILDINELLA Timofeev
- KILDINELLA Timofeev
- Kildinella exsculpta Timofeev
- Kildinella giperboreica Timofeev
- Kildinella hyperboreica Timofeev
- Kildinella jacutica Timofeev
- Kildinella magna Timofeev
- Kildinella minuta P.K. Maithy & M. Shukla
- Kildinella miroedichia Timofeev
- Kildinella nordia Timofeev
- Kildinella rifeica Timofeev
- Kildinella sinica Timofeev
- Kildinella suketensis P.K. Maithy & M. Shukla
- Kildinella timofeevii P.K. Maithy
- Kildinella tschapomica Timofeev
- Kildinella vesljanica Timofeev
- KINNEYIA Walcott
- Kinneyia simulans Walcott
- KINTOKIOCOLAX Tanaka & Y. Nozawa
- Kintokiocolax aggregatoceranthus_('aggregato-cerantha') Tak. Tanaka & Y. Nozawa
- KIOKANSIUM Stover & Evitt
- Kiokansium unituberculatum (Tasch) Stover & Evitt
- Kiokansium vetusculum (Davey) Stover & Williams
- KIRBYELLA Zeliff
- Kirbyella zetekii_('zeteki') Zeliff
- KIRBYNIA Grassé & Hollande
- Kirbynia dogieli (T. Bernstein) Grassé & Hollande
- Kirbynia pectinata (Kirby) Grassé & Hollande
- Kirbynia pulchra Grassé & Hollande
- KIRCHNERIA F. Hindák
- Kirchneria arcuata (G. M. Smith) Hindák
- Kirchneria contorta (Schmidle) Hindák
- Kirchneria danubiana (Hindák) Hindák
- Kirchneria elongata (G. M. Smith) Hindák
- Kirchneria extensa (Korshikov) Hindák
- Kirchneria gracillima (Bohlin) Hindák
- Kirchneria inclinata (G. Nygaard, J. Komárek, J. Kristiansen, & O.M. Skulberg) Hindák
- Kirchneria irregularis (G. M. Smith) Hindák
- Kirchneria major (Bernard) Hindák
- Kirchneria mayorii_('mayori') (G.S. West) F. Hindák
- Kirchneria microscopica (Nygaard) Hindák
- Kirchneria mucosa (Korshikov) Hindák
- Kirchneria phaseoliformis (Hortobágyi) Hindák
- Kirchneria roselata (Hindák) Hindák
- Kirchneria rotunda (Korshikov) Hindák
- Kirchneria subcapitata (Korshikov) Hindák
- Kirchneria turfosa (Uherkovich) Hindák
- Kirchneria valida (G. Nygaard, J. Komárek, J. Kristiansen, & O.M. Skulberg) F. Hindák
- Kirchneria van-goorii ('van-goori') (G. Nygaard, J. Komárek, J. Kristiansen, & O.M. Skulberg) F. Hindák
- Kirchneria van-goorii var. decussata (Nygaard, Komárek, Kristiansen, & Skulberg) Hindák
- KIRCHNERIELLA Schmidle
- Kirchneriella africana Pocock
- Kirchneriella aperta Teiling
- Kirchneriella arcuata G.M. Smith
- Kirchneriella bibraiana (Reinsch) E.G. Williams
- Kirchneriella contorta (Schmidle) Bohlin
- Kirchneriella contorta var. elegans (Playfair) Komárek
- Kirchneriella contorta var. elongata (G. M. Smith) Komárek
- Kirchneriella contorta var. gracillima Bohlin
- Kirchneriella contorta [beta] gracillima (Bohlin) Chodat
- Kirchneriella contorta var. lunaris Rich
- Kirchneriella cornuta Korshikov
- Kirchneriella dalecarlica Lundberg
- Kirchneriella danubiana F. Hindák
- Kirchneriella dianae (Bohlin) Comas Gonzalez
- Kirchneriella dianae var. major (Korshikov) Comas Gonzalez
- Kirchneriella elegans Playfair
- Kirchneriella elongata G.M. Smith
- Kirchneriella extensa (Korshikov) Hindák
- Kirchneriella gracillima Bohlin
- Kirchneriella incurvata Belcher & Swale
- Kirchneriella intermedia Korshikov
- Kirchneriella intermedia var. major Korshikov
- Kirchneriella irregularis (Smith) Korshikov
- Kirchneriella irregularis var. danubialis Hortobágyi
- Kirchneriella irregularis var. spiralis Korshikov
- Kirchneriella javorkae Hortobágyi
- Kirchneriella lunaris (Kirchner) Möbius
- Kirchneriella lunaris var. acuta Playfair
- Kirchneriella lunaris var. aperta (Teiling) Playfair
- Kirchneriella lunaris var. approximata Playfair
- Kirchneriella lunaris var. contorta (Schmidle) Playfair
- Kirchneriella lunaris var. dianae Bohlin
- Kirchneriella lunaris var. gracillima (Bohlin) Playfair
- Kirchneriella lunaris var. irregularis G.M. Smith
- Kirchneriella lunaris var. solitaria Arnoldi
- Kirchneriella lunata Schmidle
- Kirchneriella major C. Bernard
- Kirchneriella mayorii_('mayori') (G.S. West) J. Komárek
- Kirchneriella microscopica G. Nygaard
- Kirchneriella mucosa (Korshikov) Hindák
- Kirchneriella nephrocytioides (Fott & Cado) Hindák
- Kirchneriella obesa (West) West & West
- Kirchneriella obesa var. contorta Schmidle
- Kirchneriella obesa var. major (Bernard) G.M. Smith
- Kirchneriella obesa var. pygmaea W. West & G.S. West
- Kirchneriella obtusa (Korshikov) Komárek
- Kirchneriella phaseoliformis Hortobágyi
- Kirchneriella phaseoliformis T. Hortobágyi
- Kirchneriella pinguis Hindák
- Kirchneriella pseudoaperta Komárek
- Kirchneriella roselata F. Hindák
- Kirchneriella rotunda (Korshikov) Hindák
- Kirchneriella secktiana González Guerrero
- Kirchneriella sinensis Skvortsov
- Kirchneriella subcapitata Korshikov
- Kirchneriella subsolitaria G.S. West
- KIRCHNERIELLOPSIS H. Kufferath
- Kirchneriellopsis conradii Kufferath
- KIRCHNERIELLOSACCUS Islam
- Kirchneriellosaccus lunatus Islam
- KISELEVIA Vozzhennikova
- Kiselevia major Vozzhennikova
- Kiselevia ornata Vozzhennikova
- KISSELEVIA Vozzhennikova
- KISSELEVIA Skvortsov
- KISSELEVIA Skvortsov
- Kisselevia acuta Skvortsov
- Kisselevia insolens Eaton
- Kisselevia ornata f. reticulata Vozzhennikova
- Kisselevia stagnalis Skvortzov
- Kisselevia stagnalis Skvortzov
- KISSELEVIELLA Sheshukova-Poretskaya
- Kisseleviella carina Sheshukova-Poretskaya
- Kisseleviella ezoensis F. Akiba
- Kisseleviella magnaareolata F. Akiba & Y. Yanagisawa
- KISSELJOVIA Vozzhennikova
- KISSELOVIA Vozzhennikova
- Kisselovia edwardsii (G. J. Wilson) Stover & Evitt
- Kisselovia ornata Vozzhennikova
- KITAKAMIANIA Ishijima
- Kitakamiania concentrica R. Endo
- Kitakamiania eguchii Ishijima
- KITTONIA Grove & Sturt
- Kittonia barboi J. Brun
- Kittonia deflexa Barker & Meakin
- Kittonia elaborata (Grove & Sturt) Grove & Sturt
- Kittonia gigantea (Greville) De Toni
- Kittonia granulata Chenevière
- Kittonia grevilleana ('grevilliana') Grove & Sturt
- Kittonia hannae_('hannai') Lefébure & Chenevičre
- Kittonia hillabyana J. Brun
- Kittonia morenoensis Brigger & Hanna
- Kittonia pentagona Meakin & Brigger
- Kittonia ruski Brigger & Hanna
- Kittonia tenuicornis Barker & Meakin
- Kittonia tesrapoda Brigger & Hanna
- Kittonia tripedia Chenevière
- Kittonia virgata (Grove & Sturt) Grove & Sturt
- KIZAKIMONAS Skvortsov
- Kizakimonas bogoriensis Skvortsov
- KJELLMANIA Reinke
- Kjellmania sorifera Reinke
- Kjellmania striarioides Gran
- Kjellmania subcontinua Rosenvinge
- KJELLMANIELLA Miyabe
- Kjellmaniella crassifolia Miyabe
- Kjellmaniella gyrata (Kjellman) Miyabe
- Kjellmaniella gyrata var. crispata Miyabe
- KLEBAHNIA Arth.
- KLEBAHNIELLA Lemmermann
- Klebahniella elegans Lemmermann
- KLEBSIA Olfers
- KLEBSIELLA Trevisan
- KLEBSIELLA Pascher
- KLEBSIELLA Skvortsov
- Klebsiella alligata Pascher
- Klebsiella ellipsoidea Skvortsov
- Klebsiella hemisphaerica Skvortsov
- Klebsiella planctonica Skvortsov
- Klebsiella rubiacearum {info}
- KLEBSIMASTIX Skvortsov
- Klebsimastix ellipsoidea Skvortsov
- KLEBSINA Silva
- Klebsina alligata (Pascher) Silva
- KLEBSORMIDIUM Silva, Mattox, & Blackwell
- KLEBSORMIDIUM Silva, Mattox, & Blackwell
- Klebsormidium crenulatum (Kützing) Lokhorst
- Klebsormidium dissectum (F. Gay) T. Mrozinska
- Klebsormidium dissectum (F. Gay) H. Ettl & G. Gärtner
- Klebsormidium flaccidum [(Kützing) Silva, Mattox, & Blackwell]
- Klebsormidium flaccidum (Kützing) Silva, Mattox, & Blackwell
- Klebsormidium flaccidum f. aquaticum_('aquatica') (Heering) Nizamuddin & Gerloff
- Klebsormidium flaccidum var. crassum (R. Chodat) H. Ettl & G. Gärtner
- Klebsormidium flaccidum var. lubricum (R. Chodat) H. Ettl & G. Gärtner
- Klebsormidium flaccidum var. nitens (Kützing) T. Mrozinska
- Klebsormidium flaccidum f. tumidum (Heering) H. Ettl & G. Gärtner
- Klebsormidium klebsii (G. M. Smith) Silva, Mattox, & Blackwell
- Klebsormidium lamellosum Wei & Hu
- Klebsormidium marinum [Silva, Mattox, & Blackwell]
- Klebsormidium marinum (Deason) Silva, Mattox, & Blackwell
- Klebsormidium montanum (Hansgirg) S. Watanabe
- Klebsormidium mucosum (Boye Petersen) Lokhorst
- Klebsormidium pseudostichococcus (Heering) H. Ettl & G. Gärtner
- Klebsormidium rivulare (Kützing) Morison & Sheath
- Klebsormidium scopulinum (Hazen) H. Ettl & G. Gärtner
- Klebsormidium sterile [Silva, Mattox, & Blackwell]
- Klebsormidium sterile (Deason & Bold) Silva, Mattox, & Blackwell
- Klebsormidium subtilissimum [(Kützing)] [Silva, Mattox, & Blackwell]
- Klebsormidium subtilissimum (Rabenhorst) Silva, Mattox, & Blackwell
- KLEINIELLA Francé
- Kleiniella stagnalis Francé
- KLEITHRIASPHAERIDIUM R.J. Davey
- Kleithriasphaeridium corrugatum R.J. Davey
- Kleithriasphaeridium eoinodes (A. Eisenack) R.J. Davey
- Kleithriasphaeridium fasciatum (R.J. Davey & G.L. Williams) R.J. Davey
- Kleithriasphaeridium porospinosum R.J. Davey
- Kleithriasphaeridium simplicispinum (R.J. Davey & G.L. Williams) R.J. Davey
- Kleithriasphaeridium tubulosum (Cookson & Eisenack) Stover & Evitt
- KLINODASCUS Jurilj
- KLINODISCUS Jurilj
- Klinodiscus obliquus Jurilj
- KNEUCKERIA Schmidle
- Kneuckeria pulchra Schmidle
- KNIGHTIA R.D. Wood
- KOCZYIA Boudreaux & Hay
- Koczyia excelsa Perch-Nielsen
- Koczyia fimbriata (Bramlette & Sullivan) Perch-Nielsen
- Koczyia lepida Boudreaux & Hay
- KOFOIDIA Light
- Kofoidia loriculata Light
- KOFOIDIELLA Skvortsov
- SCANNING ERROR
- Kofoidiella uniflagellata Skvortsov
- KOFOIDINIUM Pavillard
- Kofoidinium arcticum Bursa
- Kofoidinium pavillardii ('pavillardi') J. Cachon & M. Cachon
- Kofoidinium splendens J. Cachon & M. Cachon
- Kofoidinium velleloides Pavillard
- KOFOIDOPSIS Tasch
- Kofoidopsis coronata Tasch
- KOINOPODION Pascher
- Koinopodion aggregatum Pascher
- KOIVINELLA [Tchuvashov]
- KOIZUMIA Y. Yanagisawa
- Koizumia adaroi (Azpeitia Moros) Y. Yanagisawa
- Koizumia akibae Y. Yanagisawa
- Koizumia tatsunokuchiensis (I. Koizumi) Y. Yanagisawa
- KOLBEANA Skvortsov
- KOLBEANA Skvortsov
- Kolbeana oblonga Skvortsov
- Kolbeana oleifera Skvortsov
- Kolbeana ovoidea Skvortsov
- Kolbeana ovoidea Skvortsov
- KOLBESIA F.E. Round & L. Bukhtiyarova
- Kolbesia kolbei (Hustedt) F.E. Round & L. Bukhtiyarova
- Kolbesia ploenensis (Hustedt) F.E. Round & L. Bukhtiyarova
- KOLDERUPIA S. Lund
- Kolderupia lucifuga (Kuckuck) S. Lund
- Kolderupia maritima (Kjellman) S. Lund
- KOLIELLA Hindák
- Koliella alpina (Kol) Hindák
- Koliella bernina (Kol) Hindák
- Koliella budapestinensis Hortobágyi
- Koliella chodatii (Kol) Hindák
- Koliella closterioides (Kufferath) Hindák
- Koliella corcontica Hindák
- Koliella elongata (Nygaard) Nygaard
- Koliella helvetica (Kol) Hindák
- Koliella longiseta (Vischer) Hindák
- Koliella longiseta f. tenuis Nygaard
- Koliella longiseta f. variabilis Nygaard
- Koliella nivalis Hindák
- SCANNING ERROR
- Koliella planctonica Hindák
- Koliella pyrenoidifera (Korsikov) Hindák
- Koliella sempervirens (Chodat) Hindák
- Koliella setiformis (Kom.-Legn.) Nygaard
- Koliella sigmoidea Hindák
- Koliella spiculiformis (Vischer) Hindák
- Koliella spiculiformis f. tenella Nygaard
- Koliella spirotaenia (G.S. West) Hindák
- Koliella spirulinoides Hindák
- Koliella stagnalis Hindák
- Koliella tatrae (Kol) Hindák
- SCANNING ERROR
- Koliella tatrae var. bratislavensis Hindák
- Koliella tatrae var. fogarasensis (Kol) Hindák
- Koliella tatrae var. saussurei (Kol) Hindák
- Koliella tatrae var. yellowstonensis (Kol) Hindák
- Koliella transsylvanica (Kol) Hindák
- Koliella viretii (Chodat) Hindák
- KOLKWITZIELLA Lindemann
- Kolkwitziella apochlorotica Korshikov
- Kolkwitziella gibbera (Lindemann) Lindemann
- Kolkwitziella salebrosa Lindemann
- Kolkwitziella salebrosa var. gibbera Lindemann
- Kolkwitziella salebrosa var. gibbera Lindemann
- KOMAREKIA Fott
- Komarekia appendiculata (Chodat) Fott
- Komarekia lauterbornii (Schmidle) Fott
- Komarekia rotundata (Teiling) Fott
- KOMEWUIA Cookson & Eisenack
- Komewuia glabra Cookson & Eisenack
- KOMIA Korde
- Komia abundans Korde
- Komia eganensis E. C. Wilson & Waines
- Komia erki Güvenc
- KOMMA D.R.A. Hill
- Komma caudata (L. Geitler) D.R.A. Hill
- Komvophoron bourrellyi X. Turon, M. Hernandez-Mariné, & J. Catalan
- Komvophoron tenuis (Emoto & Hirose) I. Umezaki & M. Watanabe
- KONINCKOPORA G. W. Lee
- Koninckopora grandis Tchuvashov
- Koninckopora macropora Maslov
- Koninckopora micropora Maslov
- Koninckopora mortelmansi Jaffrezo
- Koninckopora pruvosti Güvenc
- KONINCKOPOROIDES M. Rich
- Koninckoporoides monteaglensis M. Rich
- KOPETDAGARIA Maslov
- Kopetdagaria sphaerica Maslov
- SCANNING ERROR
- KORDEOPHYTON Rezak
- KORDEPHYTON K.V. Radugin & M.V. Stepanova
- Kordephyton conglutinatum Korde
- Kordephyton crinitum (Korde) Korde
- Kordephyton crispum (Korde) Korde
- KORNMANNIA Bliding
- Kornmannia leptoderma (Kjellman) Bliding
- Kornmannia leptoderma f. mytilicola Vinogradova
- Kornmannia zostericola (Tilden) Bliding
- KOROJONIA Cookson & Eisenack
- Korojonia dubiosa Cookson & Eisenack
- KORSAKIA V. P. Vladimirovich
- KORSCHIKOFFIA Pascher
- Korschikoffia collata Pascher
- Korschikoffia guttula Pascher
- KORSCHIKOVIELLA 'Silva'
- KORSCHPALMELLA Fott
- Korschpalmella apyrenoidosa (F. Hindák) F. Hindák
- Korschpalmella apyrenoidosa (F. Hindák) F. Hindák
- Korschpalmella ettlii Hindák
- Korschpalmella microscopica (Korshikov) Fott
- Korschpalmella mucosa (Korshikov) Hindák
- Korschpalmella sphagnicola (Hindák) Hindák
- KORSHIKOVIELLA P. C. Silva
- Korshikoviella gracilipes (Lambert) P. C. Silva
- Korshikoviella issajevii (Kisselev) Ergashev
- Korshikoviella issajevii var. spinosa (Korshikov) Ergashev
- Korshikoviella judayi (G. M. Smith) Ergashev
- Korshikoviella limnetica (Lemmermann) P. C. Silva
- Korshikoviella michailovskoensis (Elenkin) P.C. Silva
- Korshikoviella mystacina (Hortobágyi & Németh) Philipose
- Korshikoviella schaefernai (Fott) P. C. Silva
- Korshikoviella setosa (Filarszky) P. C. Silva
- KORSIKOVELLA Valkanov
- Korsikovella vaucheriae Valkanov
- KORUGA Cleveland
- Koruga bonita Cleveland
- KOSMOGYRA G. Stache
- Kosmogyra acanthica Stache
- Kosmogyra caelata var. baccata (Reid & Groves) Rásky
- Kosmogyrina andreanszkyi (Rásky) Mädler
- Kosmogyra cingulata Stache
- Kosmogyra guttifera Stache
- Kosmogyra harmati Rásky
- Kosmogyra nodosa (Lu) Horn af Rantzien
- Kosmogyra ornata Stache
- Kosmogyra ovalis Mädler
- Kosmogyra perarmata Stache
- Kosmogyra superba Stache
- Kosmogyra szepesfalvyi Rásky
- KOSMOGYRELLA Stache
- Kosmogyrella carinata Stache
- Kosmogyrella undulata (Dollfus & Fritel) Pia
- KOSMOGYRINA Mädler
- KOSTINOPHYCUS Vologdin
- Kostinophycus irregularis Vologdin
- KOSVOPHYTON Korde
- Kosvophyton uralicum Korde
- KOZLOVIELLA A. P. Jousé
- Kozloviella edita Jousé
- Kozloviella minor Jousé
- Kozloviella pacifica Jousé
- Kozloviella subrotunda J. Fenner
- KRAFTIA Shepley & Womersley
- Kraftia dichotoma Shepley & Womersley
- KRASSKELLA Ross & Sims
- Krasskella hyalina J.R. Carter & P. Denny
- Krasskella kriegeriana_('kriegerana') (Krasske) Ross & Sims
- KREAGRA R. Gersonde & D.M. Harwood
- Kreagra bifalcata R. Gersonde & D.M. Harwood
- Kreagra forfex R. Gersonde & D.M. Harwood
- Kreagra forfex f. serrata R. Gersonde & D.M. Harwood
- Kreagra tripartita R. Gersonde & D.M. Harwood
- KREMASTOCHLORIS Pascher
- Kremastochloris conus Pascher
- KREMASTOCHRYSIS Pascher
- Kremastochrysis major Pascher
- Kremastochrysis minor Catalan
- Kremastochrysis ocellata Pascher
- Kremastochrysis pendens Pascher
- KREMASTOCHRYSOPSIS Bourrelly
- Kremastochrysopsis ocellata (Pascher) Bourrelly
- KRKIA I. Pevalek
- Krkia croatica Pevalek
- KROBYLOPTERIS P. Schmidt
- Krobylopteris oltmannsii P. Schmidt
- KRUEGERA Heering \{on card as Krügera\}
- Kruegera saccharophila (Krüger) Heering
- KRYPTOPERIDINIUM Lindemann
- Kryptoperidinium foliaceum (Stein) Lindemann
- KTENODISCUS Pantocsek
- Ktenodiscus germanicus Forti & Schulz
- Ktenodiscus hungaricus Pantocsek
- Ktenodiscus russicus Pantocsek
- KTENOMONAS A. Szabados
- Ktenomonas hungariae A. Szabados
- KUCKUCKIA G. Hamel
- Kuckuckia catalinae Hollenberg
- Kuckuckia crinigera (Kuckuck) Hamel
- Kuckuckia kylinii Cardinal
- Kuckuckia spinosa (Kützing) Kornmann
- KUEMMERLEA Krenner
- Kuenckelia gyrans Künstler \{on card as Künckelia\}
- KUETZINGIA Sonder
- KUETZINGIA R.D. Wood \{also on card: Subsection of Chara\}
- Kuetzingia angusta Harvey
- Kuetzingia natalensis J. Agardh
- Kuetzingia pectinella (Harv.) Falkenberg
- Kuetzingia serrata Harvey
- KUETZINGIELLA_('KU\*:TZINGIELLA') Kornmann
- Kuetzingiella battersii (Bornet) Kornmann
- Kuetzingiella battersii var. mediterranea (Bornet ex Sauvageau) A. Gómez & M. A. Ribera
- Kuetzingiella elachistaeformis (Heydrich) Balakrishnan & Kinkar
- Kuetzingiella holmesii (Batters) Russell
- Kuetzingiella holmesii (Batters) Russell
- Kuetzingiella maculans (Kuckuck) Kornmann
- KUETZINGINA 0. Kuntze
- Kuetzingina amethystea (Kützing) Kuntze
- Kuetzingina amoena (Kützing) Kuntze
- Kuetzingina scytonemoidea (Meneghini) Kuntze
- Kuetzingina villosa (Kützing) Kuntze
- KULMITES Nieuwland
- Kulmites fischeri (Heer) Nieuwland
- KULPARIA Preiss & Walter
- Kulparia kulparensis Preiss
- KUNDATIA Korde
- Kundatia composita Korde
- KUROGIA T. Yoshida
- Kurogia pulchra T. Yoshida
- KURTHIA Trevisan
- Kurthia zopfii (Kurth) Trevisan
- KURZIA Martens
- Kurzia crenacanthoidea Martens
- KUSHIROENSE S. Kumano \{also on card: subsection of Batrachospermum\}
- Kussiella tuanshanziensis Y.Z. Liang & R.C. Tsao
- KUZMINIA Skvortsov
- Kuzminia incerta Skvortsov
- KVALEYA Adey & Sperapani
- Kvaleya epilaeve Adey & Sperapani
- KYANOSTICHUS Romanov
- Kyanostichus dexter Romanov
- KYBOTION Pascher
- Kybotion ellipsoideum R. H. Thompson
- Kybotion eremita Pascher
- Kybotion globosum (Matw.) Bourrelly
- KYLINDRODES Cedergren \{also on card: Section of Cosmarium\}
- KYLINIA Rosenvinge
- Kylinia affinis (Howe & Hoyt) Kylin
- Kylinia alariae (Jonsson) Kylin
- Kylinia arcuata (Drew) Kylin
- Kylinia australis Levring
- Kylinia baltica (Rosenvinge) Papenfuss
- Kylinia battersiana (Hamel) Kylin
- Kylinia boergesenii (Schiffn.) Papenfuss
- Kylinia catenulata (Howe) Kylin
- Kylinia collopoda (Rosenvinge) Kylin
- Kylinia compacta (Jao) Papenfuss
- Kylinia crassipes (Børgesen) Kylin
- Kylinia curta (Baards.) Papenfuss
- Kylinia cytophaga (Rosenvinge) Papenfuss
- Kylinia duboscqii (Feldm.) Papenfuss
- Kylinia dufourii (Collins) Kylin
- Kylinia dumontiae (Rosenvinge) Papenfuss
- Kylinia dwarkensis ('dwarkense') (Børgesen) T. V. Desikachary, M. S. Balakrishnan, & V. Krishnamurthy \{pcs\}
- Kylinia erecta (Børgesen) T. V. Desikachary, M. S. Balakrishnan, & V. Krishnamurthy
- Kylinia floridula ('floridulum') (Dillw.) Papenfuss
- Kylinia gynandra (Rosenvinge) Kylin
- Kylinia hallandica (Kylin) Kylin
- Kylinia hirsuta (Drew) Kylin
- Kylinia hoytii (Collins) Kylin
- Kylinia humilis (Rosenvinge) Papenfuss
- Kylinia immersa (Rosenvinge) Papenfuss
- Kylinia implicata (Drew) Papenfuss
- Kylinia infestans (Howe & Hoyt) Papenfuss
- Kylinia kylinioides (Feldmann) Pankow
- Kylinia liagorae (Børgesen) Papenfuss
- Kylinia liagoroides (Børgesen) Papenfuss
- Kylinia macropus (Kylin) Kylin
- Kylinia macula (Rosenvinge) Papenfuss
- Kylinia maluina (Hamel) Kylin
- Kylinia mediterranea (Levr.) Papenfuss
- Kylinia microscopica (Nägeli) Kylin
- Kylinia moniliformis (Rosenvinge) Kylin
- SCANNING ERROR
- Kylinia moniliformis var. mesogloiae (Jao) W. R. Taylor
- Kylinia parvula (Kylin) Kylin
- Kylinia polyblasta (Rosenvinge) Papenfuss
- Kylinia porphyrae (Drew) Papenfuss
- Kylinia pulchella (Børgesen) Papenfuss
- Kylinia rhipidandra (Rosenvinge) Kylin
- Kylinia robusta (Børgesen) T. V. Desikachary, M. S. Balakrishnan, & V. Krishnamurthy
- Kylinia rosulata Rosenvinge
- Kylinia sargassi (Børgesen) Kylin
- Kylinia sargassicola (Børgesen) Untawale, Dhargalkar, & Agadi
- Kylinia scapae L. Lyle
- Kylinia secundata (Lyngbye) Papenfuss
- Kylinia seriaspora Dawson
- Kylinia sessilis (Nakam.) Papenfuss
- Kylinia simplex (Drew) Kylin
- Kylinia spathoglossi (Børgesen) Aleem
- Kylinia stilophorae (Levr.) Papenfuss
- Kylinia subpinnata (Bornet ex Hamel) Kylin
- Kylinia terminalis (Nakamura) Noda & Yokoyama
- Kylinia terminalis (Nakamura) Noda & Konno
- Kylinia trifila (Buffham) Kylin
- Kylinia unifila (Jao) Papenfuss
- Kylinia unilateralis (Kjellman) Kylin
- Kylinia unipes (Børgesen) T. V. Desikachary, M. S. Balakrishnan, & V. Krishnamurthy
- Kylinia virgatula (Harv.) Papenfuss
- Kylinia virgatula f. luxurians (J. Agardh ex Kützing) A. D. Zinova
- KYLINIELLA Skuja
- Kyliniella latvica Skuja
- KYMALITHON Me. Lemoine & Emberger
- Kymalithon belgicum (Foslie) Me. Lemoine & Emberger
- KYMATOCOCCUS Hansgirg \{also on card: sectio of Trochiscia\}
- KYMATOSPHAERA Pascher \{also on card: section of Meringosphaera\}
- KYMATOTRICHON Schussnig
- Kymatotrichon armatum Schussnig
- KYRTUTHRIX Ercegovic
- Kyrtuthrix dalmatica Ercegovic
- Kyrtuthrix dalmatica f. epilithica Ercegovic
- Kyrtuthrix sinensis Chu & Wu nom. prov.
- KYZASSIA Korde
- Kyzassia elegans Korde
- Kyzassia formosa Korde
- LACINIADINIUM McIntyre
- Laciniadinium arcticum (Manum & Cookson) Lentin & G. L. Williams
- Laciniadinium biconiculum McIntyre
- Laciniadinium orbiculatum McIntyre
- LACKEYMONAS Skvortsov
- Lackeymonas brasiliana Skvortsov
- LACRIMATORIA Bory
- Lacrimatoria acus (0. F. Mueller) Bory
- Lacrimatoria epistomium (O. F. Mueller) Bory
- Lacrimatoria olor (0. F. Mueller) Bory
- Lacrimatoria sagitta (0. F. Mueller) Bory
- Lacrimatoria stricta (0. F. Mueller) Bory
- LACRYMARIA Ehrenberg
- Lacrymaria gutta Ehrenberg
- Lacrymaria olor (Müller) Ehrenberg
- Lacrymaria rugosa Ehrenberg
- LACRYMASPHAERA J. Lecal
- LACRYMASPHAERA Lecal
- Lacrymasphaera angelieri Lecal
- Lacrymasphaera angelieri J. Lecal
- LACRYMORPHUS G. E Elliott
- Lacrymorphus barremianus Dragastan
- Lacrymorphus catenaeformis subsp. sardus G. Pecorini
- Lacrymorphus perplexus G. F. Elliott
- LACUNALITES Hemer & Nygreen
- Lacunalites sphaericus Hemer & Nygreen
- LAEVIFRONS Kjellman \{also on card: Section of Galaxaura\}
- LAEVIGELLA Kofoid & Swezy \{also on card: subgenus of Gyrodinium\}
- LAEVISTRIATA Patrick \{also on card: subgenus of Navicula\}
- LAFFITTIUS Noël
- Laffittius confossus Noël
- Laffittius costatus (Gartner) Noël
- Laffittius magnacavus (Gartner) Noël
- Lagena williamsonii ('williamsoni') Harvey & Bailey
- LAGENELLA Ehrenberg
- LAGENELLA (Ehrenberg) Dujardin \{also on card: Subgenus of Cryptomonas\}
- Lagenella acuminata Schmarda
- Lagenella compressa [Eichwald]
- Lagenella cuspidata W. S. Kent
- Lagenella euchlora (Ehrenberg) J.F. Weisse
- LAGENOECA W.S. Kent
- Lagenoeca cuspidata ([W.S. Kent]) W.S. Kent
- Lagenoeca globulosa Francé
- Lagenoeca obovata Lemmermann
- Lagenoeca ovata Lemmermann
- Lagenoeca poculiformis Schiller
- Lagenoeca variabilis Skuja
- LAGENULA Ehrenberg
- Lagenula euchlora Ehrenberg
- LAGENUMBELLA Mamet
- Lagenumbella lageniformis (Reitlinger) Mamet
- Lagenumbella obscura (Reitlinger) Mamet
- LAGERHEIMIA De Toni \{also on card: subgenus of Oocystis\}
- LAGERHEIMIA (De Toni) Chodat
- LAGERHEIMIA (Chodat) Ley
- LAGERHEIMIA \{also on card: sects. Bohlinia (Lemmermann) Wille, Pilidiocystis (Bohlin) Wille\}
- Lagerheimia amphitricha (Lagerheim) Printz
- Lagerheimia aranea Behre
- Lagerheimia balatonica (Scherffel) Hindák
- Lagerheimia bispina (Hortobágyi) Hindák
- Lagerheimia breviseta (W. West & G.S. West) Printz
- Lagerheimia chodatii ('chodati') Bernard
- Lagerheimia ciliata (Lagerheim) Chodat
- Lagerheimia ciliata var. acuminata Playfair
- Lagerheimia ciliata f. decussata Playfair
- Lagerheimia ciliata var. amphitricha (Lagerheim) Playfair
- Lagerheimia ciliata var. comosa Playfair
- Lagerheimia ciliata var. coronata Playfair
- Lagerheimia ciliata var. cristata Playfair
- Lagerheimia ciliata var. genevensis (Chodat) Playfair
- Lagerheimia ciliata var. globosa Playfair
- Lagerheimia ciliata var. gracilis Playfair
- SCANNING ERROR
- Lagerheimia ciliata f. decussata Playfair
- Lagerheimia ciliata var. inermis Playfair
- Lagerheimia ciliata var. inflata Playfair
- Lagerheimia ciliata var. minor (G. M. Smith) Collins
- Lagerheimia ciliata var. minor (G. M. Smith) G. M. Smith
- Lagerheimia ciliata var. striolata Playfair
- Lagerheimia ciliata var. subglobosa (Lemmermann) Playfair
- Lagerheimia ciliata var. subsalsa (Lemmermann) Playfair
- Lamella oculata J. Brun
- Lagerheimia cingula G. M. Smith
- Lagerheimia circumfilata (Seligo) E. Hegewald & A. Schmidt
- Lagerheimia citriformis (Snow) Collins
- Lagerheimia citriformis (Snow) G. M. Smith
- Lagerheimia citriformis var. paucispina Tiffany & Ahlstrom
- Lagerheimia comosa (Playfair) Playfair
- Lagerheimia coronata (Playfair) Playfair
- Lagerheimia coronata var. inflata (Playfair) Playfair
- Lagerheimia coronata var. striolata (Playfair) Playfair
- Lagerheimia cristata (Playfair) Playfair
- Lagerheimia cyanea Schiller
- Lagerheimia dofleinii Schröder
- Lagerheimia droescheri (Lemmermann) Printz
- Lagerheimia echidna (Bohlin) Wille
- Lagerheimia elliptica Playfair
- Lagerheimia endophytica (Bohlin) Wille
- Lagerheimia genevensis (Chodat) Chodat
- Lagerheimia genevensis f. crassiseta Hortobágyi
- Lagerheimia genevensis var. gracilis (Playfair) Playfair
- Lagerheimia genevensis f. granulata Hortobágyi
- Lagerheimia genevensis var. spinosa Hortobágyi
- Lagerheimia genevensis var. subglobosa (Lemmermann) Chodat
- Lagerheimia genevensis f. crassiseta Hortobágyi
- Lagerheimia globosa (Playfair) Playfair
- Lagerheimia griffithsii Fott
- Lagerheimia hindakii E. Hegewald & A. Schmidt
- Lagerheimia indica Hortobágyi
- Lagerheimia javanica (Bernard) Schröder
- Lagerheimia longiseta (Lemmermann) Printz
- Lagerheimia longiseta var. major G. M. Smith
- Lagerheimia marssonii Lemmermann
- Lagerheimia minor Fott
- Lagerheimia minor Schiller
- Lagerheimia minor f. obtusospinosa Hortobágyi
- Lagerheimia minuta ('minutus') [Lackey]
- Lagerheimia octacantha Lemmermann
- Lagerheimia octacantha var. minor Korshikov
- Lagerheimia quadriseta (Lemmermann) G. M. Smith
- Lagerheimia splendens G.S. West
- Lagerheimia subglobosa Lemmermann
- Lagerheimia subsalsa Lemmermann
- Lagerheimia subsalsa var. pilosa (Hortobágyi) E. Hegewald & A. Schmidt
- Lagerheimia tetraedriensis Roll
- Lagerheimia trigona Hortobágyi
- Lagerheimia trigona f. longispina Hortobágyi
- Lagerheimia tyrnaviensis Hindák
- Lagerheimia urmaniensis Woloszynska
- Lagerheimia vitrea Schiller
- Lagerheimia wratislawiensis Schröder
- Lagerheimia wratislawiensis var. bispina Hortobágyi
- Lagerheimia wratislaviensis f. brevispina F. Caballero \{also on card, soratislaviensis\}
- Lagerheimia wratislawiensis f. brevispina Hortobágyi
- Lagerheimia wratislawiensis f. flexocaudata Hortobágyi
- Lagerheimia wratislaviensis f. gracilis Hortobágyi
- Lagerheimia wratislaviensis f. heterospina Hortobágyi
- Lagerheimia wratislaviensis f. minor Elenkin
- Lagerheimia wratislawiensis var. mixta Hortobágyi
- Lagerheimia wratislaviensis f. polyspina Woloszynska
- Lagerheimia wratislawiensis var. trisetigera G. M. Smith
- LAGERHEIMIELLA Borzì
- LAGERHEIMIELLA Boedijn
- LAGUNCULA Fisher
- Laguncula kellicottiana Fisher
- Laguncula piscatoris Fisher
- LAGUNCULA M. Black
- Laguncula dorotheae M. Black
- LAGYNION Pascher
- Lagynion ampullaceum (Stokes) Pascher
- Lagynion arachne (Conrad) Bourrelly
- Lagynion clavatum Naumann
- Lagynion cystodinii Pascher
- Lagynion delicatulum Skuja
- Lagynion ellipsoideum Fott
- Lagynion fulvum (Scherffel) Bourrelly
- Lagynion globosum (Matvienko) Pascher
- Lagynion globosum Mack
- Lagynion globosum var. undulatum Mack
- Lagynion hemisphaericum Naumann
- Lagynion indicum Suxena
- Lagynion janei Bourrelly
- Lagynion macrotrachelum (Stokes) Pascher
- Lagynion macrotrachelum var. oedotrachelum Ellis-Adam
- Lagynion microporum ('micropora') (Gicklhorn) Dorff
- Lagynion notostomum ('notostoma') (Pascher) Bourrelly
- Lagynion oblongum (Pascher) Bourrelly
- Lagynion ovale Naumann
- Lagynion ovatum Wislouch
- Lagynion reductum Prescott
- Lagynion reflexum Prescott
- Lagynion reniforme Naumann
- Lagynion rhizopodicum (Conrad) Bourrelly
- Lagynion scherffelii Pascher
- Lagynion scherffelii var. depressum Skuja
- Lagynion simplex (Fott) Fott
- Lagynion sphagnicola ('sphagnicolum') Bourrelly
- Lagynion spiniferum Dop
- Lagynion subovatum Prescott
- Lagynion subsphaericum Naumann
- Lagynion triangulare (Stokes) Pascher
- Lagynion triangulare var. pyramidatum Prescott
- Lagynion triquetrum Naumann
- Lagynion urceolatum Naumann
- Lagynion varians Ramanathan
- Lagynion vasicola Pascher
- LAGYNOPHORA Stache
- LAGYNOPHORA Stache
- Lagynophora articulata Stache
- Lagynophora foliosa Stache
- Lagynophora liburnica Stache
- Lagynophora liburnica Stache
- Lagynophora symmetrica Stache
- LAINGIA Kylin
- Laingia aleutica Wynne
- Laingia hookeri (Lyall) Kylin
- Laingia pacifica (Yamada) Yamada
- LAMARKIA Stackhouse
- LAMARCKIA Olivi
- Lamarckia bursa (L.) Olivi
- Lamarckia adhaerens Schousboe
- Lamarckia adhaerens (C. Agardh) Trevisan
- Lamarckia adhaerens (C. Agardh) Kuntze
- Lamarckia amphibia (Moore) Kuntze
- Lamarckia bursa Schousboe
- Lamarckia decorticata (Woodward) Trevisan
- Lamarckia elongata (C. Agardh) Kuntze
- Lamarckia filiformis (Montagne) Kuntze
- Lamarckia galeata (J. Agardh) Kuntze
- Lamarckia laminarioides_('laminariodes') (Harvey) Kuntze
- Lamarckia lindenbergii (Kützing) Kuntze
- Lamarckia linearis (C. Agardh) Kuntze
- Lamarckia mamillosa (Harvey) Kuntze
- Lamarckia mucronata (J. Agardh) Kuntze
- Lamarckia muelleri (Kützing) Kuntze
- Lamarckia pomiformis Stackhouse
- Lamarckia ramentacea [Trevisan]
- Lamarckia spongiosa (Harvey) Kuntze
- Lamarckia tenuis (Kützing) Kuntze
- Lamarckia tomentosa (Hudson) Stackhouse
- Lamarckia vermilara Olivi
- Lamarckia vermilara var. major Schousboe
- Lamarckia vermilara var. minor Schousboe
- LAMBERTIA Korshikov
- Lambertia ancora (G.M. Smith) Korshikov
- Lambertia calcarifera Kiselev \{also on card, handwritten: "Kisselev"\}
- Lambertia gracilipes (Lambert) Korshikov
- Lambertia gracilipes var. minor Korshikov
- Lambertia issajevii (Kissel.) Korshikov
- Lambertia issajevii var. spinosa Korshikov
- Lambertia judayi (G.M. Smith) Korshikov
- Lambertia judayi var. major Hortobágyi
- Lambertia judayi var. microspina Hortobágyi
- Lambertia judayi var. microspina Hortobágyi
- Lambertia judayi var. radzimowskii Korshikov
- Lambertia lanceolata Korshikov
- Lambertia limnetica (Lemmermann) Korshikov
- Lambertia michailovskoensis (Elenkin) Korshikov
- Lambertia michailovskoensis var. angustior (Elenkin) Korshikov
- Lambertia mystacina Hortobágyi & Németh
- Lambertia ocellata (Korshikov) Korshikov
- Lambertia ocellata var. maxima Uherkovich
- Lambertia schaefernai Fott
- Lambertia setosa (Filarszky) Korshikov
- Lambertia spathulifera Korshikov
- Lambertia viridis [Masyuk]
- LAMBIA Delépine
- Lambia antarctica (Skottsberg) Delépine
- LAMBLIA Blanchard
- LAMBLIA Blanchard
- LAMBLIA (Blanchard) Reuling & Rodenwaldt \{also on card: subgenus of Giardia\}
- LAMELLA J. Brun
- LAMELLA (Brun) Schütt \{also on card: Section of Climacosi\}
- Lamella oculata J. Brun
- LAMELLASOMA H. S. Davis
- Lamellasoma bacillaria H. S. Davis
- LAMELLOPHYCUS Vologdin
- Lamellophycus aculeatus Vologdin
- Lamellophycus tunguskaensis Vologdin
- LAMELLOSTROMA Vologdin
- Lamellostroma vesiculare Vologdin
- LAMINANOPSIS Skvortsov \{also on card: subgenus of Euglena\}
- Laminanopsis laminata Skvortsov & Noda
- Laminanopsis vitalii_('vitali') Skvortzov & Noda