Clarification of some imperfectly understood characters in the Chinese species Thalictrum przewalskii (Ranunculaceae), with reduction of T. lasiogynum and T. latistylum to its synonymy

YOU-PAI ZENG; QIONG YUAN; QIN-ER YANG

doi:10.11646/phytotaxa.511.3.1

Issue: Vol. 511 No. 3: 19 July 2021

Type: Article

Published: 2021-07-19

DOI: 10.11646/phytotaxa.511.3.1

Page range: 187–210

Abstract views: 39

PDF downloaded: 1

**Clarification of some imperfectly understood characters in the Chinese species Thalictrum przewalskii (Ranunculaceae), with reduction of T. lasiogynum and T. latistylum to its synonymy**

YOU-PAI ZENG⁺⁻
QIONG YUAN⁺⁻
QIN-ER YANG⁺⁻

Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China, Center of Conservation Biology, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China, University of Chinese Academy of Sciences, Beijing 100049, China

Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China, Center of Conservation Biology, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China

Eudicots Gansu geographical distribution morphology Sichuan taxonomy Thalictrum rockii Thalictrum sparsiflorum

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Abstract

Based on critical observations on both herbarium specimens (including type material) and living plants in the wild, here we clarify some morphological characters in the Chinese species Thalictrum przewalskii (Ranunculaceae) and demonstrate that T. lasiogynum and T. latistylum, described respectively from China’s Sichuan and Gansu provinces, are conspecific with it. We therefore reduce T. lasiogynum and T. latistylum to the synonymy of T. przewalskii. Thalictrum sect. Platystylus, which was established to accommodate T. latistylum, is reduced to the synonymy under T. sect. Omalophysa. The identity of T. rockii is further confirmed and the distribution in China of T. sparsiflorum, a species most closely similar to T. przewalskii and widely distributed in northeastern Asia and North America, is also determined.

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