1 IntroductionAristolochia comprises about 500 species,is the lar-gest genus of Aristolochiaceae(Wagner et al,2017)andwidely distributed throughout the tropics,subtropics andalso extending to temperate regions(González&Steven-son,2002;Hwang et al,2003;Neinhuis et al,2017;Wanke et al,2017).Currently 14 Aristolochia species,be-longing to two subgenera Siphisia and Aristolochia,werereported from Vietnam(Pham,2000;Nguyen,2003;Doet al,2017),6 of which belong to subgenus Aristolochia.In......(论文页数是：4页) ，越语专业论文，越语论文范文 |
