''Sirogonium'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of filamentous

charophyte Charophyta () is a group of freshwater green algae, called charophytes (), sometimes treated as a division, yet also as a superdivision or an unranked clade. The terrestrial plants, the Embryophyta emerged within Charophyta, possibly from terr ...

green algae The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/ Streptophyta. The land plants ( Embryophytes) have emerged deep in the Charophyte alg ...

of the

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of ...

Zygnematales. It is found in

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does in ...

areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2–10 chloroplasts in a ribbon, in contrast to the closely related genus ''

Spirogyra ''Spirogyra'' (common names include water silk, mermaid's tresses, and blanket weed) is a genus of filamentous charophyte green algae of the order Zygnematales, named for the helical or spiral arrangement of the chloroplasts that is characteri ...

'', which has chloroplasts in a coil.

Species

The following species are currently accepted: * ''

Sirogonium calosporum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Zhu * ''

Sirogonium ceylanicum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Wittrock * ''

Sirogonium decoratum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order (biology), order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each ce ...

'' Prescott * ''

Sirogonium denticulatum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' W.J.Zhu * ''

Sirogonium floridanum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' (Transeau) G.M.Smith * ''

Sirogonium fuscosporum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Woodhead & Tweed * ''

Sirogonium guangzhouense ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2� ...

'' Zhu * ''

Sirogonium hui ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' (L.C.Li) Transeau * ''

Sirogonium illinoisense ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' (Transeau) G.M.Smith * ''

Sirogonium indicum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Singh * ''

Sirogonium inflatum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Dixit * ''

Sirogonium kamatii ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Kadlubowska * ''

Sirogonium khoriense ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Masud-ul-Hassan & M.Nizamuddin * ''

Sirogonium melanosporum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' (Randhawa) Transeau * ''

Sirogonium phacosporum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Skuja * ''

Sirogonium pseudofloridanum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' (Prescott) Transeau * ''

Sirogonium reticulatum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Randhawa * ''

Sirogonium retroversum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' H.C.Wood * ''

Sirogonium sticticum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm The micrometre ( internat ...

'' (Smith) Kützing * ''

Sirogonium vandalurense ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Iyengar * ''

Sirogonium ventersicum ''Sirogonium'' is a genus of filamentous charophyte green algae of the order Zygnematales. It is found in freshwater areas on all continents but Antarctica. ''Spirogyra'' measures approximately 32–115 μm in width. Each cell contains 2– ...

'' Transeau

References

* John Whitton, B.A. and Brook, A.J. (editors) 2002. ''The Freshwater Algal Flora of the British Isles.'' Cambridge University Press, Cambridge. . {{Taxonbar, from=Q22286377 Zygnemataceae