Ha
- Haematococcaceae
- Haematococcus Flotow, 1844
- Hafniomonas Ettl & Moestrup, 1980
- Halicoryne Harvey, 1860
- Halimeda J.V.Lamouroux, 1812
- Halimedaceae
- Halimedaceae Link, 1832
- Halochlorella P.[J.L.] Dangeard, 1966
- Halochloris P.J.L.Dangeard, 1965
- Halochlorococcum P.J.L.Dangeard, 1965
Halosphaera K.J.F.Schmitz, 1878
- Halosphaera minor Ostenfeld
- Halosphaera parkeae Boalch & Mommaerts
- Halosphaera russellii Parke
- Halosphaera viridis F.Schmitz, 1878
Chlorophyta → Prasinophyceae → Pyramimonadales → Pyramimonadaceae
Porodica Halosphaeraceae Haeckel, 1894
- Pachysphaera Ostenfeld, 1899
Chlorophyta → Prasinophyceae → Chlorodendrales
Red Halosphaerales
- Porodica Pterospermataceae
- Hamakko T.Nakada, 2009
- Hariotina P.-A.Dangeard, 1889
- Harlanjohnsonella G.F.Elliott
- Hauckia Borzì
- Hazenia H.C.Bold, 1958
He
- Hediniella J.N.F.Wille, 1922
- Hedstroemia A.Rothpletz, 1913
- Hegewaldia T.Proschold, C.Bock, W.Luo & L.Krienitz, 2010
- Heleochloris Korshikov, 1953
- Heleococcus Korshikov, 1953
- Helicodictyon L.A.Whitford & G.J.Schumacher, 1996
- Helioporella Sokaè & Nikler
- Hemichloris Tschermak-Woess & Friedmann, 1984
- Hemiflagellochloris S.Watanabe, S.Tsujimura, T.Misono, S.Nakamura & H.Inoue, 2006
- Hemitoma Skuja, 1939
- Herpochaeta
- Heterochlamydomonas E.R.Cox & T.R.Deason, 1969
- Heterochlorella J.Neustupa, Y.Nemcova, M.Eliás & P.Skaloud, 2009
- Heterothrichopsis Iyengar & Kanthamma, 1941
- Heveochlorella Zhang, Huss, Sun, Chang & Pang, 2008
- Hexamitus Dujardin
- Hexasterias Ehrenberg
- Heynigia C.Bock, Proschold & Krienitz, 2010
Hi
- Hiemalomonas Skvortzov, 1971
- Hierella
- Himandactylius
- Himandactylius V.B.A.Trevisan, 1849
- Hindakia C. Bock, Proschold & Krienitz, 2010
- Hindakochloris A.Comas, 1992
- Hiroseia Skvortzov
- Hirtusochloris H.J.Hu & L.M.Luo
Ho
- Hofmannia Heister ex Fabricius, 1759
- Hormidiopsis Heering, 1914
- Hormidiospora Vinatzer, 1975
- Hormiscia Fries, 1835
- Hormococcus
- Hormospora Brébisson, 1839
- Hormotila Borzì, 1883
- Hormotilaceae
- Hormotilopsis Trainor & H.C.Bold, 1954
- Hortobagyiella L.Hajdu, 1975
Hy
- Hyaliella Pascher, 1913
- Hyalobrachion Swindell, 1939
- Hyalocardium H.Ettl, 1965
- Hyalochlorella R.O.Poyton, 1970
- Hyalococcus H.Warén, 1920
- Hyalogonium Pascher, 1927
- Hyaloraphidium Pascher & Korshikov, 1931
- Hydraea O.Dragastan et al., 1997
- Hydrianum Rabenhorst, 1868
- Hydrodictyaceae
- Hydrodictyon Roth, 1797
- Hylodesmus Eliás, Nemcová, Skaloud, Neustupa, Kaufnerová & Sejnohová, 2009
- Hypnomonadaceae
- Hypnomonas Korshikov, 1926