Ranunculus luanchuanensis (Ranunculaceae), a new species from Henan, China

By

Fei, Wen-qun
Yuan, Qiong
Yang, Qinger

Type

Article

Date of Publication

2023

Original Publication

PhytoKeys

Volume

220

Pages

17--29

Subjects

Asia , buttercups , Ranunculales , Ranunculus limprichtii

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.220.96799

 

Abstract

Ranunculus luanchuanensis (Ranunculaceae), a new species from Laojun Shan in Luanchuan county, Henan province, central China, is here illustrated and described. It is morphologically similar to R. limprichtii in having 3-lobed and subreniform basal leaves, 3-lobed cauline leaves, and small flowers with reflexed and caducous sepals, but differs by having slender and basally slightly thickened roots (vs. fusiform), prostrate stems (vs. erect), obliquely ovoid and glabrous carpels and achenes (vs. widely ovoid and puberulous), longer styles in the carpels (ca. 1.2 mm vs. 0.6–0.8 mm) and achenes (ca. 1.8 mm vs. 0.6–0.8 mm), and glabrous receptacles (vs. sparsely puberulous). Ranunculus luanchuanensis, currently known only from its type locality, is geographically isolated from R. limprichtii, a species widely distributed in Gansu, Qinghai, Sichuan, Xizang (Tibet) and Yunnan, China. The distribution map of this new species and its putative closest ally, R. limprichtii, is also provided.