Five taxanes with an amino-side chain on C-5 were identified for the first time in the needles of the Canadian yew, Taxus canadensis. Their structures were characterized as 2α,7β,9α,10β,13-pentaacetoxy-11β-hydroxy-5α-(3′-N,N-dimethylamino-3′-phenyl)-propionyloxytaxa-4(20),12-diene (1), 2α,9α-dihydroxy-10β,13α-diacetoxy-5α-(3′-methylamino-3′-phenyl)-propionyloxytaxa-4(20),11-diene (2), 2α17-dihydroxy-9α,10β,13α-triacetoxy-5α-(3′-N,N-dimethylamino-3′-phenyl)-propionyloxytaxa-4(20),11-diene (3), 2α-hydroxy-7β,9α,10β,13α-tetraacetoxy-5α-(2′-hydroxy-3′-N,N-dimethylamino-3′-phenyl)-propionyloxytaxa-4(20),11-diene (4), and 9α-hydroxy-2α,10β,13α-triacetoxy-5α-(3′-N,N-dimethylamino-3′-phenyl)-propionyloxytaxa-4(20),11-diene (5) on the basis of 1D-, 2D-NMR spectroscopic data and high-resolution fast atom bombardment MS analyses. Metabolite (1) was isolated from the needles of the Canadian yew for the first time but had previously been detected in the stems of the Japanese yew, whereas taxanes (2–5) are only now reported. Metabolite (3) is the first reported nitrogen-containing taxane with a 17-hydroxyl substitution.