Cynanchum thesioides A corona and gynostegium with long style-head (front view) B corona and gynostegium with short style-head (front view) C corona and gynostegium with short style-head (vertical view) D corona and gynostegium with long style-head (vertical view) E pair of fruits F stamen (front view) G stamen (back view) H stamen (front view) I stamen (back view) J pollinarium K seeds the concave surface (left) and convex surface (right) A, D, F, G and J from Meng Wei in C.F. Zhang 6791 (HIB); B, C, H, I from Zhongxiang Pubic Health Bureau s.n. (HIB [0101695]). All photos by Cai-Fei Zhang, except J by Miao Liao, E by Bing Liu in Beijing and K by Qin-Wen Lin in Beijing.