Abstract:Comparison between Cordyceps sinensis (Berk.) Sacc. and Cephalosporium sinensis Chen sp, nov. shows that both are of low toxicity and have similar sedative, antianoxia, antiasthmatic, expectorant and anti-inflamatory effects. Moreover, their potency appears almost the same. Cordyccps sincnsis (Berk.) Sate. has in addition androgenic effect, and thus could be used to prevent and treat "the deficiency of Yang" induced by injection of hydrocortisone acetate in Chen mice.