The Floral Syndrome and Its Pollination in Cynanchum otophyllum (Asclepiadaceae)
WANG Ding-Kang , , SUN Gui-Fang , ZHAI Shu-Hua , GUO Li-Hong , XIAO Feng-Hui
Plant Diversity . 2009, (1): 8 -14 .  DOI: 10.3724 SP.J.1143.2009.07329