Two new taxanes with a dimethylamino group on the C-5 side chain were identified for the first time in the needles of the Canadian yew, Taxus canadensis. Their structures were characterized as 7 beta,10 beta,13 alpha-triacetoxy-5 alpha-(3'-dimethylamino-3'-phenylpropanoyl)- oxy-2 alpha-hydroxy-2(3 -> 20)abeotaxa-4(20),11-dien-9-one (1) and 2 alpha,10 beta-diacetoxy-9 alpha-hydroxy-5 alpha-(3'-dimethylamino-3'-phenylpropanoyl)oxy-3,11-cyclotax-4(20)-en- 13-one (2).