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| Isotrema plagiostomum X. X. Zhou & R. J. Wang in Zhuo, Jiang, Zhu, ... et Wang, 2019. |
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.
Keywords: Aristolochia, Isotrema, new species, taxonomy, Magnoliids
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| FIGURE 2. Isotrema plagiostomum X. X. Zhou & R. J. Wang. A. Habit, showing alternate leaves and axillary inflorescences, B. Part of abaxial leaf surface, showing the pubescence, C. Front view of flower, showing the deeply "V-shaped" calyx limb, D. Longitudinal section of flower, E. Part of adaxial side of basal calyx tube, showing tomentose surface, F. Gynostemium, G. Capsule, H. Seeds. Illustrated by Bing-Mou Wang. |
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| FIGURE 1. Isotrema plagiostomum X. X. Zhou & R. J. Wang. A. Habitat and habit, B. Stem with alternate leaves and axillary inflorescences, C. Adaxial (left) and abaxial (right) side of leaf, D. Inflorescence with fascicle flowers, E-G. Front, lateral and back view of flower, respectively, H-I. Longitudinal section of flower, showing changeable color and pubescence adaxially, J-K. Gynostemium and its transverse section, showing the paired anthers and their position, L-N. Capsule, and its transverse section, longitudinal section, respectively, showing the arrangement of seeds, O. Seeds. |
Isotrema plagiostomum X. X. Zhou & R. J. Wang
Xin-Xin Zhuo, Guo-Bin Jiang, Xin-Xin Zhu, Zi-Yue Liu, Yi Huang, Gang-Tao Wang and Rui-Jiang Wang. 2019. Isotrema plagiostomum (Aristolochiaceae), A New Species from Guangdong, South China. Phytotaxa. 405(4); 221–225. DOI: 10.11646/phytotaxa.405.4.7
