Gelidocalamus zixingensis (Poaceae, Bambusoideae, Arundinarieae), a new species from southern China revealed by morphological and molecular evidence

By

Wang, Chengkun
Guo, Rong
Guo, Chunce
Yang, Guang-Yao
Zhang, Wengen

Type

Article

Date of Publication

2023

Original Publication

PhytoKeys

Volume

218

Pages

29--45

Subjects

Gramineae , leaf epidermis , Phylogeny , SEM , temperate woody bamboo

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.218.96849

 

Abstract

The genus Gelidocalamus T. H. Wen, endemic to southern China, is a small but taxonomically problematic genus of Arundinarieae (Poaceae, Bambusoideae). During field work, a population of Gelidocalamus from Zixing, Hunan, was discovered, appearing to be distinct from our previously identified collection. Comparisons of the population of Zixing were performed by using scanning electron microscopy (SEM) and a plastid genome-based phylogeny. Morphologically, it was mostly similar to G. multifolius, but differed by culm leaf erect with densely white pubescence, apical branch sheath much longer than the internodes and foliage leaf larger. Phylogenetically, the new species was well-supported as a sister to the clade of G. multifolius + G. tessellatus, and the above three taxa were clustered in the Shibataea clade (IV) of Arundinarieae. Thus, the new species, formally named as Gelidocalamus zixingensis W.G.Zhang, G.Y.Yang & C.K.Wang, was described and illustrated herein.