Metapetrocosmea navicularis, a new species of Gesneriaceae in Vietnam

By

Li, Qi-Yang
Tan, Ke
Truong, Do Van, 1984-
Xin, Zibing
Bai, Xinxiang
He, Song-Tao
Wen, Fang

Type

Article

Date of Publication

2025-8-7

Original Publication

PhytoKeys

Volume

261

Pages

87--98

Subjects

Didymocarpoideae , flora of Vietnam , Metapetrocosmea tamiana , Morphology , Phylogeny

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.261.160454

 

Abstract

Based on morphological comparisons, literature reviews, and molecular systematic studies, a new species from South Vietnam, Metapetrocosmea navicularis F.Wen, T.V.Do, Z.B.Xin & K.Tan, has been confirmed. Morphologically, this new species resembles Metapetrocosmea tamiana (B.L.Burtt) Yin Z.Wang & P.W.Li in leaf peltate, bilabiate corollas, arcuate filaments, and slightly curved capsule, while it is distinguished from M. tamiana in having leaf blade ovate to ovate-elliptic, boat-shaped bracts 6–9 mm long, the ratio of corolla lobes length to corolla tube length consistently 1 : 3, corolla tube gradually narrowed from mouth to base, subcylindrical-infundibulate, 10–20-flowered or more, filaments pubescent near the top. Molecular phylogenetic analyses using the combined dataset of trnL-F and ITS sequences show that the new species is also most closely related to M. tamiana. The conservation status of this new species is assessed as Least Concern (LC).