Ceropegia luzhiensis, a new species of Apocynaceae from Yunnan, China

Ceropegia luzhiensis X.D. Ma & J.Y. Shen, a new species from Yimen, Yunnan, China, is described and illustrated. This species is similar to C. hookeri C. B. Clarke, C. intermedia Wight and C. manoharii Sujanapal, Salim, Anil & Sasidh., but clearly differs in its indumentum, the shape of leaf, the length of peduncle and pedicel, the shape and size of corolla and the shape of interstaminal corona lobe. A table including the morphological characters of related species and a dichotomous key to all 20 species of Ceropegia occurring in China are provided.