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

文献类型： 外文期刊

作者： Xu, Lian-sheng 1 ; Li, Tian 1 ; Xu, Ye-chun 3 ; Chen, You-sheng 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable Ut, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China

2.Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Beijing, Peoples R China

3.Guangdong Acad Agr Sci, Environm Hort Res Inst, Guangdong Prov Key Lab Ornamental Plant Germplasm, Guangzhou 510640, Guangdong, Peoples R China

关键词： Aristolochiaceae; Guangdong; Isotrema; new taxon

期刊名称：PHYTOTAXA （ 影响因子：1.1； 五年影响因子：1.1 ）

ISSN： 1179-3155

年卷期： 2023 年 601 卷 1 期

页码：

收录情况： SCI

摘要： Isotrema guangdongense (Aristolochiaceae), a new species from Guangzhou, Guangdong Province, South China, is described and illustrated. This new species is similar to I. kwangsiense in its habit, cordate leaves, and yellow throat of calyx tube. However, it differs from the latter by its leaves puberulous or glabrous adaxially, abaxially densely villous (vs. both surfaces moderately to densely hirsute), flower usually solitary (vs. racemes 2-3 flowered), pedicel 4-7 cm long (vs. pedicel 2.5-3.5 cm long), calyx abaxially whitish with purple-red stripes and yellow to brown villous (vs. yellowish, abaxially densely rusty hirsute), limb adaxially white with dense big purple spinous processes while abaxially pale white (vs. adaxially dark purple with dense big purple spinous processes while abaxially pale yellowish green), and throat of calyx limb ca. 10-17 mm in diam. (vs. 5-6 mm in diam.).

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