Cirsium taiwanense (Compositae, Cirsium sect. Onotrophe, subsect. Australicirsium), a new species from Taiwan

By

Chang, Chih-Yi
Tzeng, Hsy-Yu
Tseng, Yen-Hsueh

Type

Article

Date of Publication

2021

Original Publication

PhytoKeys

Volume

183

Pages

35--53

Subjects

Australicirsium Kitam , central-northern Taiwan , Cirsium , karyotype analysis , Pollen morphology , subsect

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.183.70119

 

Abstract

A new species of Cirsium, C. taiwanense Y.H.Tseng & Chih Y.Chang from central-northern Taiwan is reported in this article. This species is similar to C. hosokawae Kitam. in having a densely cobwebby abaxial leaf surface, but differs in its yellow (vs. vivid purplish red) corolla and the angle between the midrib and the lateral veins of the leaf, which is acute as opposed to nearly at a right angle in C. hosokawae. Cirsium taiwanense has 2n = 32 chromosomes, which is different from the other species in the Taiwanese subsect. Australicirsium Kitam. (2n = 34). An identification key to the Cirsium taxa of Taiwan is presented.