Dodatak:Popis parožina, C
, Chaetosphaeridiaceae , Chaetosphaeridiales , Chaetosphaeridium Klebahn, 1892 , Chaetotheke I.Düringer, 1958 , Chara Linnaeus, 1753 , Characeae S.F. gray, 1821 , Charales , Chareae , Charites H.Horn af Rantzien, 1959 , Charophyceae , Charophyta , Charophyta incertae sedis , Chlorokybus Geitler, 1942
, Clavatoraceae , Clavatoraxis C.Martin-Closas & C.Diéguez, 1998 , Closteriaceae Bessey, 1907 , Closteriospira Reverdin, 1917 , Closterium Nitzsch ex Ralfs, 1848
, Coleochaetaceae , Coleochaetales , Coleochaete Brébisson, 1844 , Colpopelta Corda , Conochaete Klebahn, 1893 , Cosmarium Corda ex Ralfs, 1848 , Cosmocladium Brébisson, 1856
, Croasdalea C.E.M.Bicudo & C.T.J.Mercante , Croftiella H.Horn af Rantzien, 1959 , Cruciangulum D.B.Williamson
, Cylindriastrum (W.B.Turner) G.M.Palamar-Mordvintseva , Cylindrocystis Meneghini ex De Bary, 1858