This deals with the studies on a parasitic alga Cephaleuros virescens found in Wuhan and the relations with its host Camillia oleifera. Discovery of Cephaleuros virescens grown on Camillia oleifera in Hubei province is a new record of this alga for this province and a new host of this alga. Judging from the enviroment of Cephaleuros virescens in Wuhan, this alga may be widely distributed in other localities in Hubei and also in other provinces along the Yangtze River, Where its hosts exist. Camillia oleifera is a well known economical plant in China, Thus the studies on the relation between this oil crop and the alga is really an important problum, on botany and agronomy.