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Issue: Vol. 502 No. 2: 24 May 2021
Type: Article
Published: 2021-05-24
DOI: 10.11646/phytotaxa.502.2.2
Page range: 133–148
Abstract views: 16
PDF downloaded: 1

Thalictrum minshanicum and T. pseudoramosum (Ranunculaceae), two new species from 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 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
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
Gansu Min Shan region morphology Sichuan taxonomy Eudicots

Abstract

Thalictrum minshanicum and T. pseudoramosum (Ranunculaceae), two new species from southern Gansu and northwestern Sichuan, China, are illustrated and described. Thalictrum minshanicum is somewhat similar to T. brevisericeum in habit and in having puberulent stem and leaves, but differs by having conspicuously 3-lobate (vs. slightly 3-lobate) leaflets, glabrous (vs. puberulent abaxially) sepals, longer (ca. 7 mm vs. ca. 4 mm) and clavate (vs. oblanceolate-linear) filaments, conspicuous (vs. inconspicuous) stigmas, and persistent styles slightly recurved (vs. circinate) at apex. Thalictrum pseudoramosum is closely similar to T. ramosum in habit and in having slightly recurved styles at apex, but differs by having subcoriaceous (vs. herbaceous) leaflets, more numerous stamens (40‒60 vs. 16‒24), and elliptic-fusiform (vs. lanceolate-fusiform) achenes.