Abstract
Cynanchum pingtaoi sp. nov. (Apocynaceae), from Yunnan
Province, China, is described and illustrated based on molecular and
morphological evidence. Its deeply cordate to reniform leaves,
campanulate and large flowers show that it is a member of formerRaphistemma which has been included in Cynanchum now. It
is different from the all former Raphistemma species (C.
hooperianum ,C. longhushanense and C. pulchellum ) by the
broadly ovate corolla lobe, purple-red corolla, and connivent corona tip
slightly exceeding corolla throat. Its detailed morphological
description and illustrations are provided. Meanwhile, Cynanchum
longhushanense G.D.Tang & Miao Liao nom. nov. is proposed as
the replacement name of Raphistemma brevipedunculatum Y. Wan
which is reinstated from a synonym of C. hooperianum (Blume)
Decne because of their significant morphological differences.