Gymnema phuquocense (Apocynaceae, Asclepiadoideae), a new species from Vietnam

By

Ha, Bui Thu
Han, Le
Trân, Thé Bách‏

Type

Article

Date of Publication

2025

Original Publication

PhytoKeys

Volume

251

Pages

203--210

Subjects

Asclepiadoideae , Gymnema , Phu Quoc , Vietnam

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.251.136457

 

Abstract

A new species of Gymnema from Vietnam – G. phuquocense – is described, illustrated, and compared with the similar G. yunnanense. Gymnema phuquocense differs from G. yunnanense by the length of peduncle (3–4 mm vs. 10–13 mm), hairs on corolla lobe margin (absent vs. present), shape of seed (broadly ovate vs. ovate-oblong), shape of scale with 2 prominent longitudinal ridges on corolla tube (lanceolate vs. linear), and length of seeds (9–10 mm vs. 13–15 mm). A diagnostic key of the Gymnema species in Vietnam is also provided.