A new species and a replacement name in Cynanchum (Apocynaceae, Asclepiadeae) from China

By

Liao, Miao
Zeng, Si-Jin
Zeng, Lin-Ya
Yin, Hai-Jun
Yan, Mao-Lin
Zhang, Caifei
Tang, Guang-Da

Type

Article

Date of Publication

2024

Original Publication

PhytoKeys

Volume

241

Pages

49--63

Subjects

Cynanchum hooperianum , Cynanchum longhushanense , Cynanchum pingtaoi , Morphology , Phylogeny , Raphistemma , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.241.111499

 

Abstract

Cynanchum pingtaoi S.Jin Zeng, G.D.Tang & Miao Liao, sp. nov. (Apocynaceae) from Yunnan Province, China, is described and illustrated based on morphological and molecular evidence. Its deeply cordate to reniform leaves and campanulate, large flowers show that it is a member of former Raphistemma Wall., which has been included in Cynanchum L.. It is different from all former Raphistemma species by the broadly ovate corolla lobes, purple-red corolla and connivent corona tip slightly exceeding the corolla throat. Meanwhile, Cynanchum longhushanense G.D.Tang & Miao Liao, nom. nov. is proposed as replacement name for Raphistemma brevipedunculatum Y.Wan, which was considered a synonym of Cynanchum hooperianum (Blume) Liede & Khanum but is here reinstated as a distinct species because of significant morphological differences.