Abstract: Six special and interesting species of Chlorococcales are the first found from China.They are Dictyochloris fragrans Vischer ex Starr from soil, parasitic algae Chlorchytri-um lemmae Cohn in the leaf tissue of Potarnogeton, Gloeocystis polydermatica (Kuetzing) Hindak from the bark of a Cinnamomum camphora, symbiotic alga Trebouxia aboricola de Puymaly and Trebouxia glomerata (Waren.) Ahmadjian from lichen and epiphytic algae Ec-togeron elodeae Dangeard on the cell wall of Cladophora .All of the genera are also new to China except the genus Gloeocystis .