Sinosenecio minshanicus (Asteraceae, Senecioneae), a new species from south-eastern Gansu and northern Sichuan, China

By

Su, Xiu-Jiang
Fei, Wen-qun
Zhao, Ding
Liu, Ying
Yang, Qinger

Type

Article

Date of Publication

2023

Original Publication

PhytoKeys

Volume

218

Pages

79--91

Subjects

chromosome number , Compositae , floral micromorphology , Sinosenecio rotundifolius , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.218.97475

 

Abstract

Sinosenecio minshanicus (Asteraceae, Senecioneae), a new species from south-eastern Gansu (Wenxian and Zhugqu counties) and northern Sichuan (Pingwu county), China, is described and illustrated. This species is similar to S. rotundifolius, a species locally endemic to Songpan county in northern Sichuan, in having a scapigerous habit, orbicular leaves and solitary capitula, but differs by the presence (vs. absence) of stolons and by having thinner rhizomes (ca. 2 mm vs. more than 5 mm in diameter), stems proximally sparsely fulvous arachnoid or glabrescent (vs. densely sericeous-villous) and obscure (vs. conspicuous) main veins on adaxial surface of leaves. The chromosome number of the new species is reported to be 2n = 60. Colour photographs of living plants in the wild and a distribution map are provided for the new species and S. rotundifolius. The geographical distribution of S. rotundifolius is also corrected, with the previous record of this species from south-eastern Gansu (Wenxian county) actually referring to S. minshanicus.