Gastrochilus obovatifolius (Orchidaceae, Aeridinae), a new species from the Daba Mountains of Chongqing, China

By

Xiong, Chi
Xiao-Ying, Fu
Tan, Ke
Huang, Ya
Zhang, Hong-Jing
Yi-Chen, Wang
Yubing, Yang
Yi, Sirong

Type

Article

Date of Publication

2025

Original Publication

PhytoKeys

Volume

252

Pages

25--40

Subjects

Epidendroideae , Flora of Chongqing , G. sect. Microphylli , Phylogeny , Qinling-Daba Mountains , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.252.133501

 

Abstract

Gastrochilus obovatifolius, a new species discovered in the Dabashan of northeast Chongqing (China), is described and illustrated. The novelty morphologically resembles G. affinis, G. balangshanensis and G. heminii in having a glabrous and smooth epichile. but can be distinguished by the unique obovate shape of the leaves, smaller epichile, and flower color. The results of molecular phylogenetic analysis, based on nuclear ribosome internal transcribed spacer (nrITS) and four chloroplast DNA fragments (matK, psbA–trnH, psbM–trnD, and trnL–F) of 55 Gastrochilus species, support the inclusion of G. obovatifolius in G. sect. Microphylli, being most closely related to G. balangshanensis from Sichuan. The new species is a trunk epiphyte in evergreen broad-leaved forest.