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Issue: Vol. 405 No. 4: 6 June 2019
Type: Article
Published: 2019-06-06
DOI: 10.11646/phytotaxa.405.4.7
Page range: 221–225
Abstract views: 52
PDF downloaded: 1

Isotrema plagiostomum (Aristolochiaceae), a new species from Guangdong, South China

Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China
Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China University of Chinese Academy of Sciences, Beijing 10049, China
College of Life Sciences, Xinyang Normal University, Xinyang 464000, Henan, China
Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China
Yangchun 529600, Guangdong, China
Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China University of Chinese Academy of Sciences, Beijing 10049, China
Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China
Aristolochia Isotrema new species taxonomy Magnoliids

Abstract

Isotrema plagiostomum X. X. Zhou & R. J. Wang, a new species of Isotrema (Aristolochiaceae) from Guangdong, south China, is described and illustrated for the first time. It is similar to I. thwaitesii in the morphology of the obliquely truncated calyx limb, but differs by the habit, leaf shape, inflorescence position and splitting extent of calyx limb. It is evaluated as CR according to the IUCN categories and criteria.