Puccinia striiformis f.sp.tritici,the causal agent of wheat stripe rust,has been known as a heteroecious,macrocyclic rust fungus that requires two unrelated plant species to complete its life cycle since barberry (Berberis spp.) and Mahonia spp.were successively identified as the alternate hosts for the pathogen.There are a great number of species in genera Berberis and Mahonia,however,only 29 species in the genus Berberis and 1 species in Mahonia,M.aquifolium,have been reported to serve as alternate hosts for P.striiformis f.sp.tritici.Most species in these two genera have not been known whether to serve as aecial host for this rust pathogen.In this study,we collected one species,B.germanensis,native to Stuggart,Germany and morphologically differentiated from the known Berberis species that have been confirmed as the alternate hosts of P.striiformis f.sp.tritici.Pycnia and aecia were obtained from infected seedlings of B.germanensis after inoculation with basidiospores of race CYR32 of P.striiformis f.sp.tritici.The resultant aeciospores from the barberry infected susceptible wheat cv.Mingxian 169 to produce sori typical uredia of P.striiformis f.sp.tritici.Therefore,B.germanensis is a new species of alternate host for P.striiformis f.sp.tritici.The result provides useful information for insight into managing wheat stripe rust.