Index Nominum Algarum Image Index (being edited!)
CARD IMAGES
beginning with administrative (spirogyra complete except for temporary cards that precede the rest)
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- {Admin. spirogyra complete except for temporary cards that precede the rest)}
- Spirogyra meridionalis W.J. Zhu & Zhong
- Spirogyra subcrassiuscula Bi
- Spirogyra reticulata f. cylindrospora (Liu) Liu Lian
- Spirogyra subcylindrospora f. major (Bi) Bi Liejiu
- Spirogyra mutabilis Jao & Hu Hongjun
- Spirogyra henanensis (Bi) Bi Liejiu
- Spirogyra gibberosa f. dissimilis (Liu) Liu Lian
- Spirogyra frigida f. maxima (H. J. Chu & W. J. Chu) Jao
- Spirogyra decimina f. cylindrospora (J.J. Liang & Wang) J. J. Liang & Wang
- Spirogyra borgeana f. intermedia (Zheng & Ling) Zheng Yingmin & Ling Yuanjie
- Spirogyra fossulata Jao & Hu
- Spirogyra arcta var. lapponica Lagerheim
- Spirogyra collinsii (Lewis) Printz
- Spirogyra crassa var. megaspora (Lagerheim) Hansgirg
- Spirogyra crassiuscula Transeau
- Spirogyra cryptoptycha Nägeli
- Spirogyra daedalea Lagerheim
- Spirogyra elongata (Berkeley) Kützing
- Spirogyra fluviatilis f. ramosa (Svirenko) Poljansky
- Spirogyra heeriana f. ucrainica (Smirnoff) Poljansky
- Spirogyra hornschuchii Kersten
- Spirogyra insignis var. braunii (Rabenhorst) Rabenhorst
- Spirogyra lineata f. tenuior Nordstedt
- Spirogyra litorea Zanardini
- Spirogyra longata var. elongata Rabenhorst
- Spirogyra longata [subsp.] elongata Hansgirg
- Spirogyra majuscula var. brachymeres Stizenberger
- Spirogyra majuscula [subsp.] brachymeres (Stizenberger) Hansgirg
- Spirogyra majuscula var. brachymeres Stizenberger
- Spirogyra majuscula var. minor Wittrock
- Spirogyra maxima f. livida (Vailionis) Poljansky
- Spirogyra megaspora Transeau
- Spirogyra mienningensis Li
- Spirogyra nitida f. major Wittrock & Nordstedt
- Spirogyra quinina var. alpina Brügger
- Spirogyra scrobiculata (Stockmayer) Czurda
- Spirogyra sericea Zanardini
- Spirogyra singularis Nordstedt
- Spirogyra skvortzowii Krieger
- Spirogyra stictica f. tenuior (Transeau) Poljansky
- Spirogyra striata Klein
- Spirogyra submaxima f. major (Skvortzov) Poljansky
- Spirogyra tenuior (Nordstedt) Krieger
- Spirogyra tolosana Comère
- Spirogyra tuberculata Lagerheim
- Spirogyra weberi var. elongata (Sprée) Rabenhorst
- Spirogyra weberi var. tenuis (Rabenhorst) Hansgirg
- Spirogyra weberi var. tenuis (Rabenhorst) Kirchner
- Stauroneis goeppertiana Bleisch
- SPIROGYRA Link
- SPIROGYRA Link
- SPIROGYRA (Link) Endlicher
- SPIROGYRA {sections}
- SPIROGYRA {sections}
- SPIROGYRA {sectio SALMACIS (Bory) Hansgirg subsectio ORNATIS Kasanowsky & Smirnoff}
- SPIROGYRA subgen. EUSPIROCYRA (Hansgirg) Hansgirg
- Spirogyra acanthophora (Skuja) Czurda
- Spirogyra adjerensis Gauthier-Lièvre
- Spirogyra adnata Dumortier
- Spirogyra adnata (Vaucher) Meneghini
- Spirogyra adnata (Vaucher) Kützing
- Spirogyra adnata f. elongata Filarszky
- Spirogyra adornata Y. J. Ling
- Spirogyra aequalis F.L. Harvey
- Spirogyra aequalis F.L. Harvey
- Spirogyra aequinoctialis G.S. West
- Spirogyra affinis (Hassall) P. Petit
- Spirogyra affinis f. tibetica Wille
- Spirogyra africana (Fritsch) Czurda
- Spirogyra africana f. major Kamat
- Spirogyra ahmedabadensis Kamat
- Spirogyra alpina Kützing
- Spirogyra alsiophila Skuja {provisional}
- Spirogyra alternata (Hassall) Kützing
- Spirogyra amphimorpha Islam
- Spirogyra ampla (Jao) Krieger
- Spirogyra amplectens Skuja
- Spirogyra anamola Bhashyakarla Rao
- Spirogyra anceps Skvortzov
- Spirogyra anceps Skvortzov & Noda
- Spirogyra anchora Skuja
- Spirogyra angolensis Welwitsch ex W. West & G.S. West
- Spirogyra angustissima G.S. West
- Spirogyra annularis Reinsch
- Spirogyra anomala Bhashyakarla Rao
- Spirogyra aphanosculpta Skuja
- Spirogyra aplanosporum Randhawa
- Spirogyra arcta (C. Agardh) Endlicher
- Spirogyra arcta var. abbreviata Rabenhorst
- Spirogyra arcta var. catenaeformis (Hassall) Kirchner
- Spirogyra arcta [subsp.] catenaeformis (Hassall) Hansgirg
- Spirogyra arcta var. genuina Kirchner
- Spirogyra arcta subsp. genuina (Kirchner) Hansgirg
- Spirogyra arcta f. incrassata Filarszky
- Spirogyra arcta var. nodosa (Kützing) Rabenhorst
- Spirogyra arcta subsp. nodosa (Kützing) Hansgirg
- Spirogyra arcta var. torulosa (Kützing) Rabenhorst
- Spirogyra arcta subsp. ulothrichoides ('ulotrichoides') (Kützing) Hansgirg
- Spirogyra areolata Lagerheim
- Spirogyra arizonensis Rickert & Hoshaw
- Spirogyra arta Jao
- Spirogyra articulata Transeau
- Spirogyra articulata Meneghini
- Spirogyra asiatica Czurda
- Spirogyra asiatica Czurda
- Spirogyra atasiana Czurda
- Spirogyra atrobrunnea Gauthier-Lièvre
- Spirogyra atroviolacea V. Martens
- Spirogyra aubevillii Gauthier-Lièvre
- Spirogyra australensis Möbius
- Spirogyra australica Czurda
- Spirogyra austriaca Czurda
- Spirogyra autumnalis Skvortzov
- Spirogyra autumnalis Skvortzov & Noda
- Spirogyra azygospora R.N. Singh
- Spirogyra azygospora var. inflata Kamat
- Spirogyra baileyi Schmidle
- Spirogyra batekiana Gauthier-Lièvre
- Spirogyra bellis ('belle') (Hassall) Crouan frat.
- Spirogyra bellis var. minor G.S. West
- Spirogyra bellonae Zeller
- Spirogyra bicalyptrata Czurda
- Spirogyra bichromatophora (Randhawa) Transeau
- Spirogyra bifaria Kützing
- Spirogyra biformis Jao
- Spirogyra biharensis A.M. Verma & B. Kumari
- Spirogyra bimorpha ('bimorphis') Dixit
- Spirogyra borgeana Transeau
- Spirogyra borgeana var. dimorpha Chian
- Spirogyra borgeana f. dimorpha (Chian) Chian Chengyu
- Spirogyra borkuensis ('borkuense') Gauthier-Lièvre
- Spirogyra borysthenica Kasanowsky & Smirnoff
- Spirogyra borysthenica var. echinospora Kasanowsky & Smirnoff
- Spirogyra borysthenica f. echinospora (Kasanowsky & Smirnoff) Poljansky
- Spirogyra bourrellyana Gauthier-Lièvre
- Spirogyra braunii Kützing
- Spirogyra braziliensis (Nordstedt) Transeau
- Spirogyra brevis Kützing
- Spirogyra britannica Godward
- Spirogyra brunnea Czurda
- Spirogyra brunnea f. pulchrifigurata (Jao) Poljansky
- Spirogyra brunnea f. varians Bhashyakarla Rao
- Spirogyra buchetii P. Petit
- Spirogyra buchetii var. bullata Rattan
- Spirogyra bullata Jao
- Spirogyra bullata f. major Poljansky
- Spirogyra bullata f. minor Rundina
- Spirogyra bullata f. minor Liu Lian
- Spirogyra calcarea Transeau
- Spirogyra calida Crouan fr.
- Zygnema commune Hassall {out of order}
- Spirogyra calospora Cleve
- Spirogyra calospora f. major Cooke
- Spirogyra calospora f. minor Cooke
- Spirogyra calospora f. venusta (Jao) Poljansky
- Spirogyra canaliculata Segar
- Spirogyra capensis Rabenhorst
- Spirogyra capitata ('capitate') C.G. Nees
- Spirogyra caroliniana Dillard
- Spirogyra castanacea Couch
- Spirogyra catenaeformis (Hassall) Kützing
- Spirogyra catenaeformis var. affinis (Hassall) Petit
- Spirogyra catenaeformis f. angularis (Hassall) Petit
- Spirogyra catenaeformis subsp. lapponica Lagerheim
- Spirogyra catenaeformis f. malleola (Hassall) Petit
- Spirogyra catenaeformis var. parvula Transeau
- Spirogyra ceylanica (Wittrock) De Toni
- Spirogyra chakiaensis ('chakiaense') (Rao) Krieger
- Spirogyra chakiaensis var. lucknowensis ('lucknowense') Prasad & Dutta
- Spirogyra chakiaensis f. major Compère
- Spirogyra chekiangensis Jao
- Spirogyra chenii Jao
- Spirogyra chungkingensis Jao
- Spirogyra chittagongensis Islam
- Spirogyra chuniae Jao
- Spirogyra circumcissa Czurda
- Spirogyra circumlineata Transeau
- Spirogyra clavata Segar
- Spirogyra cleveana Transeau
- Spirogyra colligata Hodgetts
- Spirogyra collinsii var. ampla Jao
- Spirogyra collinsii f. ampla (Jao) Poljansky
- Spirogyra collinsii var. minor Prescott & Croasdale
- Spirogyra columbiana Czurda
- Spirogyra communis (Hassall) Kützing
- Spirogyra communis var. gemina Kirchner
- Spirogyra communis [subsp.] genuina (Kirchner) Hansgirg
- Spirogyra communis var. intorta R.N. Singh
- Spirogyra communis var. mirabilis (Hassall) Kirchner
- Spirogyra communis subsp. mirabilis (Ku\*:tzing) Hansgirg
- Spirogyra communis var. subtilis (Kützing) Rabenhorst
- Spirogyra communis var. subtilis (Kützing) Kirchner
- Spirogyra communis subsp. subtilis (Kützing) Hansgirg
- Spirogyra commutata Skvortzov
- Spirogyra commutata Skvortzov & Noda
- Spirogyra condensata (Vaucher) Dumortier
- Spirogyra condensata (Vaucher) Leiblein
- Spirogyra condensata (Vaucher) Meneghini
- Spirogyra condensata var. flechsigii (Rabenhorst) Rabenhorst
- Spirogyra condensata [subsp.] flechsigii (Rabenhorst) Hansgirg
- Spirogyra condensata var. genuina Kirchner
- Spirogyra condensata [subsp.] genuina (Kirchner) Hansgirg
- Spirogyra condensata var. rusbyi Wolle
- Spirogyra congolensis ('congolense') Gauthier-Lièvre
- Spirogyra conspicua Gay
- Spirogyra corrugata Transeau
- Spirogyra costata Kadlubowska
- Spirogyra costulata Kadlubowska
- Spirogyra crassa (Kützing) Kützing
- Spirogyra crassa f. crassoidea (Transeau) Poljansky
- Spirogyra crassa var. formosa Transeau
- Spirogyra crassa var. genuina Kirchner
- Spirogyra crassa [subsp.] genuina (Kirchner) Hansgirg
- Spirogyra crassa f. heeriana (Nägeli) Petit
- Spirogyra crassa var. heeriana (Nägeli ex Kützing) Kirchner
- Spirogyra crassa var. jassiensis Teodoresco
- Spirogyra crassa [subsp.] maxima (Hassall) Hansgirg
- Spirogyra crassa var. inaequalis (Wolle) Hansgirg
- Spirogyra crassispina Jao
- Spirogyra crassivallicularis Jao
- Spirogyra crassoidea (Transeau) Transeau
- Spirogyra crenulata R.N. Singh
- Spirogyra croasdaleae J.L. Blum
- Spirogyra curvata (C. Agardh) Endlicher
- Spirogyra cylindrica Czurda
- Spirogyra cylindrosperma (W. West & G. S. West) Krieger
- Spirogyra cylindrospora W. West & G.S. West
- Spirogyra czurdae Misra
- Spirogyra czurdiana Kadlubowska
- Spirogyra daedalea Lagerheim
- Spirogyra daedalea f. africana (G.S. West) Poljansky
- Spirogyra daedalea f. daedaleoides ('daedaloides') (Czurda) Poljansky
- Spirogyra daedalea var. jubbulporensis ('jubbulporense') Bhashyakarla Rao
- Spirogyra daedalea var. major Hirn
- Spirogyra daedalea f. oudhensis (Randhawa) Poljansky
- Spirogyra daedaleoides Czurda
- Spirogyra daedaleoides var. lata Gauthier-Lièvre
- Spirogyra danica Kadlubowska
- Spirogyra decimina (O.F. Müller) Leiblein
- Spirogyra decimina (O.F. Müller) Dumortier
- Spirogyra decimina (O.F. Müller) Link
- Spirogyra decimina f. circumcissa (Czurda) V.I. Poljansky
- Spirogyra decimina f. communis (Hassall) Poljansky
- Spirogyra decimina f. crassior Zeller
- Spirogyra decimina f. crassior Gutwinski
- Spirogyra decimina var. crassispora Meneghini
- Spirogyra decimina var. cylindricospora Liang & Wang
- Spirogyra decimina var. cylindrosperma W. West & G.S. West
- Spirogyra decimina var. flavicans (Kützing) Kützing
- Spirogyra decimina f. flavicans (Kützing) Petit
- Spirogyra decimina f. fuellebornii_('fuellebornei') (Schmidle) Fritsch & Stephens
- Spirogyra decimina var. genuina Kirchner
- Spirogyra decimina var. inflata Fritsch
- Spirogyra decimina f. juergensii (Kützing) Poljansky
- Spirogyra decimina var. laxa Kützing
- Spirogyra decimina f. elongata_('longata') (Vaucher) V.I. Poljansky
- Spirogyra decimina f. longispora Misra
- Spirogyra decimina var. macrospora Meneghini
- Spirogyra decimina var. minor Meneghini
- Spirogyra decimina var. oblonga Chu Chia Wang
- Spirogyra decimina f. olivascens (Rabenhorst) Poljansky
- Spirogyra decimina var. plena W. West & G.S. West
- Spirogyra decimina var. submarina Collins
- Spirogyra decimina var. subterrestris Meneghini
- Spirogyra decimina var. triplicata Collins
- Spirogyra decimina var. triplicata F.S. Collins
- Spirogyra decimina f. tropica G.S. West
- Spirogyra densa Kützing
- Spirogyra denticulata Transeau
- Spirogyra dentireticulata Jao
- Spirogyra desikacharyensis Rattan
- Spirogyra dicephalla Jao & H. Z. Zhu
- Spirogyra dictyospora Jao
- Spirogyra dictyospora var. pulchella Bourrelly
- Spirogyra dictyospora f. subcylindrospora (Jao) Poljansky
- Spirogyra diluta Wood
- Spirogyra dimorpha Geitler
- Spirogyra discoidea Transeau
- Spirogyra discreta Transeau
- Spirogyra distenta Transeau
- Spirogyra dixitii Krieger
- Spirogyra dixitii f. megaspora (Rao) Poljansky
- Spirogyra dixitii f. melanospora (Randhawa) Poljansky
- Spirogyra djalonensis Gauthier-Lièvre
- Spirogyra djiliensis ('djiliense') Gauthier-Lièvre
- Spirogyra drilonensis Petkoff
- Spirogyra dubia Kützing
- Spirogyra dubia var. brevis Randhawa
- Spirogyra dubia var. genuina Kirchner
- Spirogyra dubia [var.] longiarticulata Kützing
- Spirogyra dubia var. polymorpha ('polymorphis') Bhashyakarla Rao
- Spirogyra dubia var. reticulata Gauthier-Lièvre
- Spirogyra echinata Tiffany
- Spirogyra echinospora J.L. Blum
- Spirogyra elegans Bonhomme
- Spirogyra elegans Wollny
- Spirogyra ellipsospora Transeau
- Spirogyra ellipsospora var. crassoidea Transeau
- Spirogyra ellipsospora var. splendida (G. West) Transeau
- Spirogyra ellipsospora f. tenuis R.N. Singh
- Spirogyra elliptica Jao
- Spirogyra elliptica Skvortzov & Noda
- Spirogyra elliptica Jao
- Spirogyra elongata (Vaucher) Dumortier
- Spirogyra elongata (Vaucher) Meneghini
- Spirogyra elongata (Wood) Wood
- Spirogyra elongata f. rupestris (Schmidle) Poljansky
- Spirogyra emilianensis Bonhomme
- Spirogyra emilianensis var. minor Chu Chia Wang
- Spirogyra endogranulata O. Bock & W. Bock
- Spirogyra esthonica (Skuja) Czurda
- Spirogyra exilis W. West & G.S. West
- Spirogyra fallax (Hansgirg) Wille
- Spirogyra farlowii Transeau
- Spirogyra fasciata (C. Agardh) Meneghini
- Spirogyra favosa Y.-X. Wei & Y.-K. Yung
- Spirogyra fennica Cedercreutz
- Spirogyra ferruginea Liang
- Spirogyra fioriniae (Montagne) De Toni
- Spirogyra flavescens (Hassall) Kützing
- Spirogyra flavescens f. flavescens Cooke
- Spirogyra flavescens f. gracilis (Hassall) Cooke
- Spirogyra flavescens f. parva (Hassall) Cooke
- Spirogyra flavescens f. parva (Hassall) Poljansky
- Spirogyra flavicans Kützing
- Spirogyra flechsigii Rabenhorst
- Spirogyra floridana Transeau
- Spirogyra fluviatilis Hilse
- Spirogyra fluviatilis var. africana Fritsch
- Spirogyra fluviatilis f. grossii (Schmidle) Poljansky
- Spirogyra fluviatilis var. hoggarica Gauthier-Lièvre
- Spirogyra fluviatilis var. major P. Dangeard
- Spirogyra fluviatilis var. minor P. Dangeard
- Spirogyra fluviatilis f. tibestica Gauthier-Lièvre
- Spirogyra formosa (Transeau) Czurda
- Spirogyra fossa Jao
- Spirogyra fossicola Jao & Chian
- Spirogyra foveolata (Transeau) Czurda
- Spirogyra fragilis Jao
- Spirogyra fragilis var. dacchensis ('dacchense') Islam
- Spirogyra fragilis f. minor Ley
- Spirogyra franconica O. Bock & W. Bock
- Spirogyra frankliniana Tiffany
- Spirogyra frigida Gay
- Spirogyra frigida f. arta (Jao) Jao
- Spirogyra fritschiana Czurda
- Spirogyra fukienica Wei
- Spirogyra fuellebornii_('Fu\*:llebornei') Schmidle
- Spirogyra fuellebornii f. crassa Bhashyakarla Rao
- Spirogyra fuellebornii var. crassa M. Gupta & D.C. Pandey
- Spirogyra fuscoatra_('fusco-atra') Rabenhorst
- Spirogyra fuzhouensis Hu
- Spirogyra gabonensis Gauthier-Lièvre
- Spirogyra gallica Petit
- Spirogyra gallica var. bichromatophora Randhawa
- Spirogyra gastroides Kützing
- Spirogyra gastunensis Schiller
- Spirogyra gauthieri Gayral
- Spirogyra gharbensis Gauthier-Lièvre
- Spirogyra ghosei R.N. Singh
- Spirogyra gibberosa Jao
- Spirogyra gibberosa f. minor Jao
- Spirogyra gigantica Hill
- Spirogyra glabra Czurda
- Spirogyra globulispora Gauthier-Lièvre
- Spirogyra globulispora f. ellipsoidea Compère
- Spirogyra goetzei Schmidle
- Spirogyra gracilis Kützing
- Spirogyra gracilis var. abyssinica Lagerheim
- Spirogyra gracilis var. flavescens (Hassall) Rabenhorst
- Spirogyra gracilis [subsp.] flavescens (Hassall) Hansgirg
- Spirogyra gracilis var. genuina Kirchner
- Spirogyra gracilis subsp. genuina (Kirchner) Hansgirg
- Spirogyra gracilis f. gibberosa (Jao) Poljansky
- Spirogyra gracilis var. longiarticulata Hilse
- Spirogyra gracilis [subsp.] longiarticulata (Hilse) Hansgirg
- Spirogyra gracilis var. magna ('magnum') Dixit
- Spirogyra gracilis var. parva (Hassall) Kirchner
- Spirogyra gracilis [subsp.] parva (Hassall) Hansgirg
- Spirogyra gracillima Skvortzov
- Spirogyra gracillima Skvortzov & Noda
- Spirogyra granulata Jao
- Spirogyra gratiana E.N. Transeau
- Spirogyra grevilleana (Hassall) Kützing
- Spirogyra grevilleana var. australis Playfair
- Spirogyra grevilleana f. diducta (Hassall) Petit
- Spirogyra grevilleana var. olivascens (Rabenhorst) Petit
- Spirogyra groenlandica Rosenvinge
- Spirogyra grossii Schmidle
- Spirogyra guineensis ('guineense') Gauthier-Lièvre
- Spirogyra gujaratensis Kamat
- Spirogyra gujaratensis var. oryzae S.C. Santra & U.C. Pal
- Spirogyra gurdaspurensis Rattan
- Spirogyra haimenensis Jao
- Spirogyra hantzschii Rabenhorst
- Spirogyra hartigii (Kützing) De Toni
- Spirogyra hassallii (Hassall) Crouan frat.
- Spirogyra hassallii var. austriaca Hansgirg
- Spirogyra hatillensis Transeau
- Spirogyra hatillensis var. kolhapurensis Kamat
- Spirogyra heeriana Nägeli ex Kützing
- Spirogyra herbipolensis O. Bock & W. Bock
- Spirogyra hoehnei Borge
- Spirogyra hoehnei var. robusta Nygaard
- Spirogyra hoggarica (Gauthier-Lièvre) Gauthier-Lièvre
- Spirogyra hollandia Taft
- Spirogyra holstii Hieronymus
- Spirogyra hopeiensis Jae
- Spirogyra hornschuchii H. Karsten
- Spirogyra hsinganica Skvortzov
- Spirogyra hsinganica Skvortzov & Noda
- Spirogyra hui Li
- Spirogyra hunanensis Jao
- Spirogyra hungarica Langer
- Spirogyra hungarica var. cracoviensis Palik
- Spirogyra hyalina Cleve
- Spirogyra hydrodictya Transeau
- Spirogyra hymerae Britton & Smith
- Spirogyra illinoiensis Transeau
- Spirogyra inaequalis (Hassall) Kützing
- Spirogyra inaequalis var. elongata Suringar
- Spirogyra incerta Skvortzov
- Spirogyra incerta Skvortzov & Noda
- Spirogyra inconstans Collins
- Spirogyra inconstans Collins
- Spirogyra incrassata Czurda
- Spirogyra indica Krieger
- Spirogyra inflata (Vaucher) Dumortier
- Spirogyra inflata (Vaucher) Kützing
- Spirogyra inflata var. abbreviata Kirchner
- Spirogyra inflata var. alsiophila Skuja
- Spirogyra inflata var. australis Thérézien & Couté
- Spirogyra inflata var. foveolata Transeau
- Spirogyra inflata var. genuina Kirchner
- Spirogyra insignis (Hassall) Kützing
- Spirogyra insignis f. conjunctiva-elongata ('conjunctiva: elongata') "Suringar"
- Spirogyra insignis var. elongata Suringar
- Spirogyra insignis var. fallax Hansgirg
- Spirogyra insignis var. forsteri Schmidle
- Spirogyra insignis var. genuina Kirchner
- Spirogyra insignis var. hantzschii (Rabenhorst) Rabenhorst
- Spirogyra insignis var. hantzschii (Rabenhorst) Petit
- Spirogyra insignis var. nordstedtii Teodoresco
- Spirogyra insignis f. rectangularis (Transeau) Poljansky
- Spirogyra insignis f. wangii ('wangi') (Li) Poljansky
- Spirogyra intermedia Rabenhorst
- Spirogyra intermedia [var.] ligustica Piccone & De Notaris
- Spirogyra intorta Jao
- Spirogyra ionia Wade
- Spirogyra irregularis Nägeli ex Kützing
- Spirogyra ivorensis Gauthier-Lièvre
- Spirogyra jaoensis ('Jaoense') Randhawa
- Spirogyra jaoi Ley
- Spirogyra jassiensis (Teodoresco) Czurda
- Spirogyra jatobae E.N. Transeau
- Spirogyra jenneri (Hassall) Crouan frat.
- Spirulina jenneri var. platensis Nordstedt
- Spirogyra jogensis Iyengar
- Spirogyra jogensis var. minor Iyengar
- Spirogyra jugalis (O.F. Müller) Kützing
- Spirogyra jugalis f. minor Virioux
- Spirogyra juergensii Kützing
- Spirogyra juergensii var. tenuior Kützing
- Spirogyra kaffirita Transeau
- Spirogyra karnalae Randhawa
- Spirogyra kolae Haidu
- Spirogyra kolhapurensis Kamat
- Spirogyra krubergii Poljansky
- Spirogyra kundaensis R.N. Singh
- Spirogyra kurzii (Zeller) De Toni
- Spirogyra kuusamoensis Hirn
- Spirogyra kuusamoensis f. skujaensis Poljansky
- Spirogyra kwangtungensis Ley
- Spirogyra labbei Gauthier-Lièvre
- Spirogyra labyrinthica Transeau
- Spirogyra lacustris Czurda
- Spirogyra lacustris f. tenuis Misra
- Spirogyra lagerheimii Wittrock
- Spirogyra lagerheimii f. breviarticulata Wittrock
- Spirogyra lagerheimii f. obovata (Jao) Poljansky
- Spirogyra lambertiana Transeau
- Spirogyra lamellata (Rao) Krieger
- Spirogyra lamellosa Jao
- Spirogyra lapponica Lagerheim
- Spirogyra latviensis Czurda
- Spirogyra laxa Kützing
- Spirogyra laxa var. variabilis Chu Chia Wang
- Spirogyra laxistrata Jao
- Spirogyra lenticularis E.N. Transeau
- Spirogyra liana Transeau
- Spirogyra libyca Gauthier-Lièvre
- Spirogyra lineata Suringar
- Spirogyra lineata var. brasiliensis Nordstedt
- Spirogyra lismorensis Playfair
- Spirogyra littorea (Lyngbye) Meneghini ined.
- Spirogyra elongata_('longata') (Vaucher) Leiblein
- Spirogyra longata (Vaucher) Kützing
- Spirogyra elongata var. communis (Hassall) Cooke
- Spirogyra longata var. genuina Kirchner
- Spirogyra longata f. inaequalis Alten
- Spirogyra longata f. major Silfvenius
- Spirogyra longata var. punctulifera Lagerheim
- Spirogyra longata var. reversa (Hassall) Kirchner
- Spirogyra longata [subsp.] reversa (Hassall) Hansgirg
- Spirogyra longata f. reversa (Hassall) Alten
- Spirogyra longata var. turpis (Kützing) Cooke
- Spirogyra longifissa Wei
- Spirogyra longispora Schmidle
- Spirogyra loskosiana (Rabenhorst) De Toni
- Spirogyra lubrica (Roth) Kützing
- Spirogyra lushanensis Li
- Spirogyra luteospora Czurda
- Spirogyra lutetiana P. Petit
- Spirogyra lutetiana var. minor W. West
- Spirogyra machrisiana Prescott
- Spirogyra macrospora (C.B. Rao) H. Krieger
- Spirogyra maghrebiana Gauthier-Lièvre
- Spirogyra magna (Dixit) Krieger
- Spirogyra major Kützing
- Spirogyra majuscula Kützing
- Spirogyra majuscula var. genuina Kirchner
- Spirogyra majuscula subsp. genuina (Kirchner) Hansgirg
- Spirogyra majuscula var. inflata Kamat
- Spirogyra majuscula var. subballis Wittrock ined.
- Spirogyra malmeana Hirn
- Spirogyra malmeana var. mattonensis ('mattonense') Misra
- Spirogyra malmeana var. minor Schmidle
- Spirogyra malmeana var. verrucosa C.B. Rao
- Spirogyra manoramae Randhawa
- Spirogyra maravillosa E.N. Transeau
- Spirogyra marchica Krieger
- Spirogyra margaritata f. kurze Venkataraman
- Spirogyra margaritata var. microspora Singh
- Spirogyra marocana Gauthier-Lièvre
- Spirogyra mattonensis ('mattonense') (Misra) Krieger
- Spirogyra maxima (Hassall) Wittrock
- Spirogyra maxima var. inaequalis (Wolle) Nordstedt & Wittrock
- Spirogyra maxima var. inaequalis (Wolle) Wolle
- Spirogyra maxima var. indica M. Gupta & D. C. Pandey
- Spirogyra maxima f. megaspora Lagerheim
- Spirogyra maxima var. minor Möbius
- Spirogyra maxima var. minor Möbius
- Spirogyra maxima f. tenuior (Magnus & Wille) Poljansky
- Spirogyra maxima f. tenuis Gauthier-Lièvre
- Spirogyra maxima f. woronichinii Poljansky
- Spirogyra miamiana Taft
- Spirogyra microgranulata Jao
- Spirogyra micropunctata Transeau
- Spirogyra microspora Jao
- Spirogyra mienningensis Li
- Spirogyra mingiana Skvortzov
- Spirogyra mingiana Skvortzov & Noda
- Spirogyra minor (Schmidle) Transeau
- Spirogyra minor var. kokiuensis Chian
- Spirogyra minuticrassoidea Yamagishi
- Spirogyra minutifossa Jao
- Spirogyra minutipunctata Hoek
- Spirogyra mirabilis Kützing
- Spirogyra mirabilis var. flavescens (Hassall) Rabenhorst
- Spirogyra mirabilis var. gracilis (Hassall) Rabenhorst
- Spirogyra mirabilis var. inaequalis {no author}
- Spirogyra mirabilis var. inaequalis Sprée
- Spirogyra mirabilis var. maharastrensis Kamat
- Spirogyra mirabilis var. microspora Beck-Mannagetta
- Spirogyra miranda Kadlubowska
- Spirogyra mithalaensis A.M. Verma & B. Kumari
- Spirogyra moebii Transeau
- Spirogyra mongolica Skvortzov
- Spirogyra mongolica Skvortzov & Noda
- Spirogyra monodiana Gauthier-Lièvre
- Spirogyra montserratii ('montserrati') Margalef
- Spirogyra naegelii Kützing
- Spirogyra nankinensis Wang
- Spirogyra narcissiana Transeau
- Spirogyra natchita Transeau
- Spirogyra nawaschinii Kasanowsky
- Spirogyra necopinata Margalef
- Spirogyra neglecta (Hassall) Kützing
- Spirogyra neglecta var. amylacca Playfair
- Spirogyra neglecta f. fuellebornii_('fuellebornei') (Schmidle) V.I. Poljansky
- Spirogyra neglecta var. intermedia Petkoff
- Spirogyra neglecta var. pseudoternata Fritsch & Rich
- Spirogyra neglecta f. tenuis Bhashyakarla Rao
- Spirogyra neglecta var. ternata (Ripart) W. West & G.S. West
- Spirogyra neglecta f. varians (Singh) Poljansky
- Spirogyra neorhizobrachilis Jao & Zhong Heng {lapsus}
- Spirogyra nigerica Gauthier-Lièvre
- Spirogyra nitida (O. F. Müller) Dumortier
- Spirogyra pratensis Transeau
- Spirogyra nitida (Dillwyn) Link
- Spirogyra nitida Kützing
- Spirogyra nitida var. atro-violacea (Martens) De Toni
- Spirogyra nitida var. densa [Petit]
- Spirogyra nitida var. densa (Kützing) Rabenhorst
- Spirogyra nitida var. mayondonensis Martinez
- Spirogyra nitida var. microspora Venkataraman
- Spirogyra nitida f. paradoxa (Rao) Poljansky
- Spirogyra nodifera O. Bock & W. Bock
- Spirogyra nodosa Kützing
- Spirogyra nodosa Kützing
- Spirogyra notabilis Taft
- Spirogyra nova-angliae Transeau
- Spirogyra nyassae Schmidle
- Spirogyra nyetigama E.N. Transeau
- Spirogyra oblata C.C. Jao
- Spirogyra oblongata Kützing
- Spirogyra obovata Jao
- Spirogyra occidentalis (Transeau) Czurda
- Spirogyra occidentalis var. striata Bourrelly
- Spirogyra occidentalis f. striata (Bourrelly & Manguin) Poljansky
- Spirogyra oligocarpa Jao
- Spirogyra olivascens Rabenhorst
- Spirogyra olivascens Rabenhorst
- Spirogyra ollicola Jao & Zhong Heng
- Spirogyra oltmannsii ('oltmannsi') Huber-Pestalozzi
- Spirogyra oraria Dupray
- Spirogyra orbicularis (Hassall) Kützing
- Spirogyra orbicularis f. tenuior Magnus & Wille
- Spirogyra orientalis W. West & G.S. West
- Spirogyra orthospira Nägeli ex Kützing
- Spirogyra orthospira f. purpurea Collins
- Spirogyra orthospira f. purpurea Collins
- Spirogyra orthospira var. spiralis Nägeli
- Spirogyra oryzetorum Skvortzov
- Spirogyra oryzetorum Skvortzov & Noda
- Spirogyra ouarsenica Gauthier-Lièvre
- Spirogyra oudhensis Rhandawa
- Spirogyra ovigera Montagne
- Spirogyra pachyderma Gauthier-Lièvre
- Spirogyra palghatensis Erady
- Spirogyra pallida G. Dickie
- Spirogyra paludosa Czurda
- Spirogyra papulata Jao
- Spirogyra papulata f. minor Jao
- Spirogyra paradoxa Bhashyakarla Rao
- Spirogyra paraguayensis Borge
- Spirogyra paraguayensis f. rhizobrachialis (Jao) Poljansky
- Spirogyra parva (Hassall) Kützing
- Spirogyra parvispora Wood
- Spirogyra parvula (Transeau) Czurda
- Spirogyra pascheriana Czurda
- Spirogyra patliputri A.M. Verma & B. Kumari
- Spirogyra peipingensis Jao
- Spirogyra pellucida (Hassall) Kützing
- Spirogyra pellucida var. minor Tiffany
- Spirogyra pellucida f. minor (Tiffany) Poljansky
- Spirogyra pellucida f. sphaerospora (Hirn) Poljansky
- Spirogyra peregrina Bonhomme
- Spirogyra perforans Transeau
- Spirogyra petitiana Transeau
- Spirogyra plena (W. West & G. S. West) Czurda
- Spirogyra polymorpha Kirchner
- Spirogyra polytaeniata Strasburger
- Spirogyra porangabae E.N. Transeau
- Spirogyra porticalis (O. F. Müller) Dumortier
- Spirogyra porticalis (O. F. Müller) Cleve
- Spirogyra porticalis var. africana G.S. West
- Spirogyra porticalis f. cylindrosperma (W. West & G. S. West) Poljansky
- Spirogyra porticalis var. decimina (O. F. Müller) Cooke
- Spirogyra porticalis [subsp.] genuina Hansgirg
- Spirogyra porticalis [subsp.] juergensii (Kützing) Hansgirg
- Spirogyra porticalis var. juergensii (Kützing) De Toni
- Spirogyra porticalis f. minor Collins
- Spirogyra porticalis f. minor F.S. Collins
- Spirogyra porticalis var. quinina (O. F. Müller) Cooke
- Spirogyra porticalis var. rivularis (Hassall) Cooke
- Spirogyra porticalis var. tenuispira Collins
- Spirogyra porticalis var. tenuispira Collins
- Spirogyra nitida (O.F. Müller) Leiblein
- Spirogyra pratensis f. fennica (Cedercreutz) Poljansky
- Spirogyra pratensis var. minor Woronichin
- Spirogyra pratensis f. minor (Woronichin) Poljansky
- Spirogyra prescottii Transeau
- Spirogyra princeps (Vaucher) Link ex Meyen
- Spirogyra proavita Langer
- Spirogyra prolifica Kamat
- Spirogyra propria Transeau
- Spirogyra protecta Wood
- Spirogyra protecta var. inflata Fritsch & Rich
- Spirogyra protecta var. latviensis [Skuja]
- Spirogyra pseudocorrugata Gauthier-Lièvre
- Spirogyra pseudocylindrica Prescott
- Spirogyra pseudodaedaloides Kadlubowska
- Spirogyra pseudodecimina O. Bock & W. Bock
- Spirogyra pseudofloridana Prescott
- Spirogyra pseudogibberosa Gauthier-Lièvre
- Spirogyra pseudogranulata Ley
- Spirogyra pseudo-juergensii H. Silva
- Spirogyra pseudomajuscula Gauthier-Lièvre
- Spirogyra pseudomaxima Kadlubowska
- Spirogyra pseudonaegelii Skvortzov
- Spirogyra pseudonaegelii Skvortzov & Noda
- Spirogyra pseudoneglecta Czurda
- Spirogyra pseudoneglecta Margalef
- Spirogyra pseudoneglecta Gauthier-Lièvre
- Spirogyra pseudonodifera O. Bock & W. Bock
- Spirogyra pseudoreticulata Krieger
- Spirogyra pseudosahnii Kadlubowska
- Spirogyra pseudospreeiana Jao
- Spirogyra pseudosubreticulata Rickert & Hoshaw
- Spirogyra pseudotenuissima O. Bock & W. Bock
- Spirogyra pseudotetrapla Kadlubowska
- Spirogyra pseudotexensis Bourrelly
- Spirogyra pseudovarians Czurda
- Spirogyra pseudoweberi Wang
- Spirogyra pseudowoodsii Poljansky
- Spirogyra pulchella (Wood) Wood
- Spirogyra pulchrifigurata Jao
- Spirogyra punctata Cleve
- Spirogyra punctata Petit
- Spirogyra punctata var. esthonica Skuja
- Spirogyra punctata f. esthonica (Skuja) Poljansky
- Spirogyra punctata var. major Hirn
- Spirogyra punctata var. tenuior Moebius
- Spirogyra puncticulata Jao
- Spirogyra punctiformis Transeau
- Spirogyra punctulata C.C. Jao
- Spirogyra punctulata var. macrospora Jao
- Spirogyra quadrata (Hassall) Petit
- Spirogyra quadrata var. bifasciata Kirchner
- Spirogyra quadrata f. bifasciata (Kirchner) De Toni
- Spirogyra quadrata var. genuina Kirchner
- Spirogyra quadrata var. mirabilis Chodat
- Spirogyra quadrata f. tenuior De Toni
- Spirogyra quadrilaminata Jao
- Spirogyra quezelii Gauthier-Lièvre
- Spirogyra quilonensis Kothari
- Spirogyra quinina (O. F. Müller) Dumortier
- Spirogyra quinina (C. Agardh) Leiblein
- Spirogyra quinina (O. F. Müller) Link
- Spirogyra quinina (O. F. Müller) Link ex Meyen
- Spirogyra quinina var. genuina Kirchner
- Spirogyra quinina var. inaequalis Nägeli ex Kützing
- Spirogyra quinina var. juergensii (Kützing) Kirchner
- Spirogyra quinquilaminata Jao
- Spirogyra randhawae Krieger
- Spirogyra rectangularis Transeau
- Spirogyra rectispira Merriman
- Spirogyra reflexa Transeau
- Spirogyra regularis (Cedercreutz) Krieger
- Spirogyra regularis (Cedercreutz) Transeau
- Spirogyra reinhardii Chmielevsky
- Spirogyra reinhardii var. africana Fritsch & Rich
- Spirogyra reticulata Nordstedt
- Spirogyra reticulata f. acanthophora (Skuja) Poljansky
- Spirogyra reticulata f. czurdae Poljansky
- Spirogyra reticulata f. nawaschinii (Kasanowsky) Poljansky
- Spirogyra reticulata var. regularis Cedercreutz
- Spirogyra reticulata f. regularis (Cedercreutz) Poljansky
- Spirogyra reticuliana Randhawa
- Spirogyra rhizobrachialis Jao
- Spirogyra rhizoides Randhawa
- Spirogyra rhizopus C.C. Jao
- Spirogyra rivularis Rabenhorst ex De Toni
- Spirogyra rivularis (Hassall) Kützing
- Spirogyra rivularis var. minor Hansgirg
- Spirogyra rivularis f. minor (Hansgirg) Poljansky
- Spirogyra robusta (Nygaard) Czurda
- Spirogyra rotundispora Skvortzov
- Spirogyra rotundispora Skvortzov & Noda
- Spirogyra rugosa (Transeau) Czurda
- Spirogyra rugulosa Iwanoff
- Spirogyra rugulosa Ivanov
- Spirogyra rugulosa var. africana Fritsch & Rich
- Spirogyra rupestris Schmidle
- Spirogyra sahnii Randhawa
- Spirogyra salina Aleem
- Spirogyra sarmae ('sarmaii') M. Singh & M. Srivastava
- Spirogyra schmidtii W. West & G.S. West
- Spirogyra schmidtii var. crassiuscula Margalef
- Spirogyra schweickerdtii Cholnoky
- Spirogyra scripta Nygaard
- Spirogyra scrobiculata var. inflata Bhashyakarla Rao
- Spirogyra sculpta Gauthier-Lièvre
- Spirogyra semiornata Jao
- Spirogyra senegalensis Gauthier-Lièvre
- Spirogyra setiformis Kützing
- Spirogyra setiformis (Roth) Martens
- Spirogyra setiformis f. diversizygotica Poljansky
- Spirogyra setiformis var. inequalis Wolle
- Spirogyra setiformis var. major Biswas
- Spirogyra setiformis var. major K. Biswas
- Spirogyra setiformis f. margaritata (Wollny) Poljansky
- Spirogyra setiformis var. maxima Ha Bhashyakarla Rao
- Spirogyra setiformis f. minor Magnus & Wille
- Spirogyra shantungensis Li
- Spirogyra siamensis Transeau
- Spirogyra siamensis var. polymorpha ('polymorphis') Rattan
- Spirogyra sibirica Skvortzov
- Spirogyra silesiaca Kadl\*/ubowska
- Spirogyra silvicola M.E. Britton
- Spirogyra sinensis L.U. Li
- Spirogyra singhii Krieger
- Spirogyra singularis Nordstedt
- Spirogyra singularis var. maior Kamat
- Spirogyra singularis f. ventricosa Venkataraman
- Spirogyra sinhaensis M. Srivastava
- Spirogyra sirogonioides Hughes
- Spirogyra sirogonioides E.O. Hughes
- Spirogyra skujae Randhawa
- Spirogyra skujae f. lushanensis (Li) Poljansky
- Spirogyra smithii Transeau
- Spirogyra sphaerica (Misra) Krieger
- Spirogyra sphaerocarpa Jao
- Spirogyra sphaerospora Hirn
- Spirogyra splendida G.S. West
- Spirogyra spreeana_('spreeiana') Rabenhorst
- Spirogyra spreeiana Rabenhorst
- Spirogyra spreeiana var. crassa Bhashyakarla Rao
- Spirogyra spreeiana var. kashiensis Venkataraman
- Spirogyra spreeiana var. kashmirensis Misra
- Spirogyra spreeiana f. minor Ley
- Spirogyra stagnalis Hilse
- Spirogyra stictica (J. E. Smith) Wille
- Spirogyra stictica var. minor Pignatti
- Spirogyra subaequa Kützing
- Spirogyra subaequa var. condensata Kützing
- Spirogyra subaffinis Fritsch & Rich
- Spirogyra subarta Jao
- Spirogyra subcrassa Woronichin
- Spirogyra subcylindrospora Jao
- Spirogyra subcylindrospora var. africana Gauthier-Lièvre
- Spirogyra subechinata Godward
- Spirogyra subfossulata Jao
- Spirogyra subfragilis Islam
- Spirogyra sublambertiana Zhao Xiongfei
- Spirogyra sublamellata Islam
- Spirogyra submargaritata Godward
- Spirogyra submarina (Collins) Transeau
- Spirogyra submaxima Transeau
- Spirogyra submaxima var. inflata Randhawa
- Spirogyra submaxima var. lamellata Bhashyakarla Rao
- Spirogyra submaxima f. lamellata (Bhashyakarla Rao) Poljansky
- Spirogyra submaxima f. mongolica (Skvortzov) Poljansky
- Spirogyra submaxima f. oryzetorum (Skvortzov) Poljansky
- Spirogyra subovata Chian
- Spirogyra subpapulata Jao
- Spirogyra subpapulata var. reticulosa Chian
- Spirogyra subpellucida Jao
- Spirogyra subpolytaeniata Jao
- Spirogyra subrectispira Jao
- Spirogyra subreflexa Liang & Wang
- Spirogyra subreticulata Fritsch
- Spirogyra subreticulata var. guayanensis ('guayanense') Thérézien
- Spirogyra subsalina Cedercreutz
- Spirogyra subsalsa Kützing
- Spirogyra subsalsa f. gracilis (Borge) Poljansky
- Spirogyra subsalsa var. macrospora Bhashyakarla Rao
- Spirogyra subsalsa f. punctulata Krasnoperova
- Spirogyra subsalsa f. uralensis Poljansky
- Spirogyra subtilis Kützing
- Spirogyra subtropica Chian
- Spirogyra suburbana Jao
- Spirogyra subvelata Krieger
- Spirogyra subventricosa (Hassall) Wittrock
- Spirogyra subventricosa var. inaequalis (Hassall) Wittrock
- Spirogyra subvermiculata Islam {invalid}
- Spirogyra sudanensis ('sudanense') Gauthier-Lièvre
- Spirogyra suecica Transeau
- Spirogyra sulcata J.L. Blum
- Spirogyra suomiana Transeau
- Spirogyra supervarians Transeau
- Spirogyra sylvestris Hilse
- Spirogyra sylvestris Hilse
- Spirogyra szechwanensis Jao
- Spirogyra szechwanensis var. varians Singh
- Spirogyra taftiana Transeau
- Spirogyra taiyuanensis Y. J. Ling
- Spirogyra tandae Randhawa
- Spirogyra taylorii Jao
- Spirogyra tenuis Meneghini
- Spirogyra tenuispina Rundina
- Spirogyra tenuissima (Hassall) Kützing
- Spirogyra tenuissima f. cylindrica (Czurda) Poljansky
- Spirogyra tenuissima var. genuina Kirchner
- Spirogyra tenuissima [subsp.] genuina (Kirchner) Hansgirg
- Spirogyra tenuissima f. inflata Cooke
- Spirogyra tenuissima var. naegelii (Kützing) Kirchner
- Spirogyra tenuissima [subsp.] naegelii (Kützing) Hansgirg
- Spirogyra tenuissima var. plena Lagerheim
- Spirogyra tenuissima f. punctata Skuja
- Spirogyra tenuissima var. rugosa Transeau
- Spirogyra tenuissima f. rugosa (Transeau) Poljansky
- Spirogyra tenuissima f. tenuissima Cooke
- Spirogyra teodorescoi ('teodoresci') Transeau
- Spirogyra ternata Ripart
- Spirogyra ternata f. maxima Bhashyakarla Rao
- Spirogyra ternata var. sphaerica Misra
- Spirogyra tetrapla E.N. Transeau
- Spirogyra texensis Taft
- Spirogyra theobaldii ('Theobaldi') Kützing
- Spirogyra thermalis Crouan fr.
- Spirogyra tibetensis Jao
- Spirogyra tjibodensis von Faber
- Spirogyra torta Blum
- Spirogyra torulosa Kützing
- Spirogyra torulosa var. nodosa Kützing
- Spirogyra trachycarps Skuja
- Spirogyra transeauiana Jao
- Spirogyra triformis Wisselingh
- Spirogyra triplicata (Collins) Transeau
- Spirogyra trispira Meneghini ined.
- Spirogyra trochainii Gauthier-Lièvre
- Spirogyra troitzkajae Poljansky
- Spirogyra tropica Kützing
- Spirogyra tropica (G.S. West) Transeau
- Spirogyra tsingtaoensis Li
- Spirogyra tumda Jao
- Spirogyra tuberculata Lagerheim
- Spirogyra tuberculosa Liang & Wang
- Spirogyra turfosa Gay
- Spirogyra turpis Kützing
- Spirogyra tuwensis Patel & Asok Kumar
- Spirogyra ugandensis ('ugandense') Gauthier-Lièvre
- Spirogyra ulothrichoides Kützing
- Spirogyra undulata Kützing
- Spirogyra unduliseptum Randhawa
- Spirogyra urbana Jao & Zhong Heng
- Spirogyra vanzantenii ('van Zantenii') Cholnoky
- Spirogyra variabilis De Wildeman
- Spirogyra varians (Hassall) Kützing
- Spirogyra varians f. bicalyptrata (Czurda) Poljansky
- Spirogyra varians f. circumlineata (Transeau) Poljansky
- Spirogyra varians f. gracilis P. Petit in litt.
- Spirogyra varians f. minor Teodoresco
- Spirogyra varians f. woodsii (Hassall) Poljansky
- Spirogyra variaspora Rickert & Hoshaw
- Spirogyra variformis E.N. Transeau
- Spirogyra varifoveolata B.N. Prasad & Dutta
- Spirogyra varshaii Prasad & Dutta
- Spirogyra vasishtii Rattan
- Spirogyra velata Nordstedt
- Spirogyra velata var. ellipsoidea Chu-Chia Wang
- Spirogyra velata f. ellipsoidea (Wang) Poljansky
- Spirogyra velata f. lateralis Gauthier-Lièvre
- Spirogyra velata var. occidentalis Transeau
- Spirogyra velata-occidentalis ('velata occidentalis') Transeau
- Spirogyra venkataramanii Rattan
- Spirogyra venosa Kadlubowska
- Spirogyra ventersica (Transeau) Krieger
- Spirogyra ventricosa Kützing
- Spirogyra ventricosa Kützing
- Spirogyra ventricosa f. elongata
- Spirogyra venusta Jao
- Spirogyra vernalis Skvortzov
- Spirogyra vernalis Skvortzov & Noda
- Spirogyra verrucogranulata I.C.A. Dias & C.E. de M. Bicudo
- Spirogyra verrucosa (Rao) Krieger
- Spirogyra verrucosa var. minor Islam
- Spirogyra verruculosa C.C. Jao
- Spirogyra verruculosa var. chakiaensis_('chakiaense') Bhashyakarla Rao
- Spirogyra verruculosa var. crassa R.N. Singh
- Spirogyra visenda Transeau
- Spirogyra voltaica Gauthier-Lièvre
- {illegible}
- Spirogyra wangii ('wangi') L.C. Li
- Spirogyra weberi Kützing
- Spirogyra weberi f. abbreviata Hirn
- Spirogyra weberi f. farlowii (Transeau) Poljansky
- Spirogyra weberi var. genuina Kirchner
- Spirogyra weberi [subsp.] genuina (Kirchner) Hansgirg
- Spirogyra weberi var. hilseana (Rabenhorst) Hansgirg
- Spirogyra weberi var. grevilleana (Kützing) Kirchner
- Spirogyra weberi [subsp.] grevilleana (Hassall) Hansgirg
- Spirogyra weberi f. grevilleana (Hassall) Alten
- Spirogyra weberi f. grevilleana (Hassall) Poljansky
- Spirogyra weberi var. intermedia (Hassall) Hansgirg
- Spirogyra weberi var. hilseana Rabenhorst
- Spirogyra weberi f. hilseana (Rabenhorst) Alten
- Spirogyra weberi f. inaequalis (Hassall) Cooke
- Spirogyra weberi f. inflata Bhashyakarla Rao
- Spirogyra weberi var. intermedia (Kützing) Kirchner
- Spirogyra weberi f. intermedia (Hassall) Petit
- Spirogyra weberi f. subventricosum (Hassall) Cooke
- Spirogyra weberi [var.] tenuior Kützing {ms.}
- Spirogyra weberi f. tjibodensis (Faber) Poljansky
- Spirogyra weishuiensis var. major Chian
- Spirogyra weishuiensis f. major (Chian) Chian Chengyu
- Spirogyra welwitschii W. West & G.S. West
- Spirogyra westii Transeau
- Spirogyra willei Skuja
- Spirogyra willei var. acanthophora Skuja
- Spirogyra wollnyi De Toni
- Spirogyra woodsii (Hassall) Czurda
- Spirogyra wrightiana E.N. Transeau
- Spirogyra wuhanensis var. minor Chian
- Spirogyra wuhanensis f. minor (Chian) Chian Chengyu
- Spirogyra wyomingia Bradley
- Spirogyra xiangshanensis Liang & Wang
- Spirogyra yunnanensis Li
- SPIROGYRITES Shukla
- SPIROMASTIGOTES Duboscq & Grassé
- Spiromastigotes rosei (Duboscq & Grassé) Grassé
- SPIROMASTIX Perfiliev
- SPIROMASTIX Perfiliev
- Spiromastix verrucosus Perfiliev
- SPIROMONAS Skuja
- SPIROMONAS Perty
- Spiromonas akopos Skuja
- Spiromonas angustata (Dujardin) W.S. Kent
- Spiromonas cohnii Warming
- Spiromonas distortum (Dujardin) W.S. Kent
- Spiromonas gonderi W. Foissner & I. Foissner
- Spiromonas parasitica Skvortzov
- Spiromonas spirogyrae Skvortzov
- Spiromonas volubilis Perty
- SPIRONEMA Klebs
- SPIRONEMATELLA Silva
- Spironematella multiciliata (Klebs) Silva
- SPIRONUCLEUS Lavier
- Spironucleus elegans Lavier
- SPIRONYMPHA Koidzumi
- SPIROPHACUS Lemmermann {subgenus of Phacus}
- SPIROPHIS Nägler
- Spirophis minima (Warming) Lauterborn
- SPIROPHYCUS Häntzschel {info}
- SPIROPHYLLUM D. Ellis
- Spirophyllum ferrugineum D. Ellis
- Spirophyllum tenue D. Ellis
- SPIROPHYTON J. Hall
- Spirophyton crassum J. Hall
- Spirophyton typum J. Hall
- SPIRORAPHIDIUM Reverdin {section of genus Ankistrodesmus}
- Spirosoma ferrugineum D. Ellis
- Spirosoma solenoide D. Ellis
- Spirosoma tenue D. Ellis
- SPIROTAENIA Brébisson
- SPIROTAENIA Brébisson
- SPIROTAENIA {subgen. or sect.}
- SPIROTAENIA {subgenera}
- SPIROTAENIA {subgenera EUSPIROTANIA Lagerheim}
- SPIROTAENIA {sect. MONOTAENIUM Wille, Engler & Prantl}
- Spirotaenia acuta Hilss
- Spirotaenia acuta f. duplo-major Grönblad
- Spirotaenia alpina Schmidle
- Spirotaenia bacillaris Lütkemüller
- Spirotaenia bahusionsis Nordstedt & Lütkemüller
- Spirotaenia bispiralis W. West
- Spirotaenia bispiralis var. fusiformis Playfair
- Spirotaenia bohemica Lütkemüller
- Spirotaenia bryophila (Brébisson) Rabenhorst
- Spirotaenia bryophila f. nivalis Lagerheim
- Spirotaenia closteridia (Brébisson) Rabenhorst
- Spirotaenia condensata Brébisson
- Spirotaenia condensata f. minor [Cedergren]
- Spirotaenia condensata f. minor W. West & G.S. West
- Spirotaenia diplohelica Coesel
- Spirotaenia eboracensis (West & West) G.S. West
- Spirotaenia elliptica Irénée-Marie
- Spirotaenia fusiformis W. West & G.S. West
- Spirotaenia gracillima Archer
- Spirotaenia grandis Delponte
- Spirotaenia insignis Skuja
- Spirotaenia kirchneri Lütkemüller
- Spirotaenia kirchneri f. erythropunctata (Lagerheim) Lütkemüller
- Spirotaenia leopoliensis Borzecki
- Spirotaenia minuta Thuret
- Spirotaenia minuta var. eboracensis W. West & G.S. West
- Spirotaenia minuta f. major Lütkemüller
- Spirotaenia minuta var. minutissima Kirchner
- Spirotaenia minuta f. erythropunctata Lagerheim
- Spirotaenia minuta var. obtusa Lütkemüller
- Spirotaenia minuta var. obtusa Lütkemüller
- Spirotaenia minuta var. typica Kirchner
- Spirotaenia minutissima Walton
- Spirotaenia muscicola De Bary
- Spirotaenia nordstedtiana De Toni
- Spirotaenia oblonga Lütkemüller
- Spirotaenia obscura Ralfs
- Spirotaenia obscura var. alpina W. Schmidle
- Spirotaenia obscura var. crassa ('crassum') J.A. Cushman
- Spirotaenia obscura f. major Lundell
- Spirotaenia obscura f. minor Lundell
- Spirotaenia parvula W. Archer
- Spirotaenia parvula f. nana Lütkemüller
- Spirotaenia raphidioides Bernard
- Spirotaenia rectispira Delponte
- Spirotaenia simplex Wawrik
- Spirotaenia spirogyroides Grönblad
- Spirotaenia tenerrima Archer
- Spirotaenia trabeculata A. Braun
- Spirotaenia truncata W. Archer
- Spirotaenia truncata f. rotundata W.B. Turner
- Spirotaenia truncorum Comère
- Spirotaenia turfosa W. West & G.S. West
- SPIROTANIOPSIS Lagerheim {Subgenus of Spirotaenia}
- SPIROTHRIX Perfiliev
- Spirothrix pseudovacuolata Perfiliev
- SPIROTRICHONYMPHA ('SPIROTRICONYMPHA') Grassi
- Spirotrichonympha bhadreshwarensis D.N. Tiwari
- Spirotrichonympha decipiens Duboscq & Grassi
- Spirotrichonympha elongata Grassi
- Spirotrichonympha flagellata (Grassi) Grassi
- Spirotrichonympha flagellata var. coptotermitis-lactei ('coptotermitis lactei') Grassi
- Spirotrichonympha flagellata var. schedorhinotermitis-intermedii ('schedorhinotermitis intermedii') Grassi
- Spirotrichonympha froilanoi Karandikar & Vittal
- Spirotrichonympha gracilis V. E. Brown
- Spirotrichonympha grandis Sutherland
- Spirotrichonympha karnataki Karandikar & Vittal
- Spirotrichonympha mirabilis Grassi
- Spirotrichonympha polygyra Cupp
- Spirotrichonympha pulchella V. E. Brown
- Spirotrichonympha segmentata Georgevitch
- SPIROTRICHONYMPHELLA Grassi
- Spirotrichonymphella psammotermitidis Hollande & Carruette-Valentin
- Spirotrichonymphella pudibunda Grassi
- SPIROTRICHOSOMA Sutherland
- Spirotrichosoma campanulum Cleveland & Day
- Spirotrichosoma capitata Sutherland
- Spirotrichosoma elongatum Cleveland & Day
- Spirotrichosoma granosum Cleveland & Day
- Spirotrichosoma limum Cleveland & Day
- Spirotrichosoma magnum ('magna') Helson
- Spirotrichosoma normum Cleveland & Day
- Spirotrichosoma obtusum ('obtusa') Sutherland
- Spirotrichosoma paramagnum Cleveland & Day
- Spirotrichosoma parvum Cleveland & Day
- Spirotrichosoma promagnum Cleveland & Day
- Spirotrichosoma submagnum Cleveland & Day
- Spirotrichosoma synaxostylatum Cleveland & Day
- SPIRULARIA 'Kützing' {lapsus}
- Spirularia tenuissima 'Kützing' {lapsus}