Abstract: In the present paper, two new varieties of Morus ustralis Poir. are described; five new combinations are made, i.e. Morus macroura Miq. var. mawu (Koidz.) C.Y.Wu et Cao, M. cathayana Hemsl. var. gongshanensis (Cao) Cao, M. mongolica (Bur.) Scheid var. barkamensis (S.S.Chang) C.Y.Wu et Cao, M.mongolica (Bur.) Scheid. var. yunnanensis (Koidz.) C.Y.Wu et Cao, M. australis Poir. var. hastifolia (Cao) Cao; M. jinpingensis S.S.Chang and M. mongolica (Bur.) Schneid. var. hopeiensis S.S.Chang et Wu Yu-bi are reduced to synonymy.

Key words: Morus