Dodatak:Popis zelenih alga, I
- Ignatius H.C.Bold & F.J.MacEntee, 1974
- Ineffigiata West & G.S.West, 1897
- Ingenhouzella
- Inoderma Kützing, 1833
- Interfilum R.Chodat, 1922
- Internoretia Setchell & Gardner, 1920
- Ireksokonia K.J.Meyer, 1927
- Isococcus F.E.Fritsch
- Isogonium (Kützing) de Bary
- Issinella
- Ivanovia Khvorova
- Iwanoffia Pascher, 1905
- Iyengariomonas Desikachary, 1965