, a new species of Aristolochiaceae from Hainan, China.

R.T.Li, X.X.Zhu & Z.W.Wang, , a new species from Hainan island, China, is described and illustrated here. It is morphologically most similar to (Han Xu, Y.D.Li & H.J.Yang) X.X.Zhu, S.Liao & J.S.Ma and (Han Xu, Y.D.Li & H.Q.Chen) X.X.Zhu, S.Liao & J.S.Ma in the shape of leaf, flower, and the yellow to brown villous indumentum of the pedicel, ovary and calyx. However, can be easily distinguished from the latter two species by its 1-5-flowered cymes, in hanging clusters of 1 to numerous branches, upper calyx tube obviously longer than basal calyx tube, calyx limb discoid, yellow inside, with purple-red stripes and spots, about 13-18 mm in diameter, glabrous, and a throat dark red without spots, 4-6 mm wide.