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[Botany • 2020] Aristolochia wenshanensis (Aristolochiaceae) • A New Species from Karst Region in southeastern Yunnan, China
Abstract Aristolochia wenshanensis Lei Cai, D.M.He & Z.L.Dao, a new species of Aristolochiaceae from southeastern Yunnan, China, is described and illustrated. The new species is morphologically most similar to A. mulunensis Y.S.Huang & Yan Liu in the shape of the leaf blade and perianth, but it can be easily distinguished by structure and color of the flower, shape of leaf blade base, especially the perianth shape, colour and texture. According to morphology the new species belongs to Aristolochia subgenus Siphisia. We also provide a table and notes to distinguish several other morphologically similar Aristolochia species. Keyword: Aristolochiaceae, Aristolochia wenshanensis, China, new taxa, karst region, flora of Yunnan Aristolochia wenshanensis Lei Cai, D.M.He & Z.L.Dao, sp. nov. 文山馬兜鈴 Diagnosis: Aristolochia wenshanensis resembles A. mulunensis in the shape of the leaf blade and perianth, but can be easily distinguished from the latter by the unconspicuous bracteole; perianth outside pale red with purple veins, densely rusty-villous; basal utricle inside purple black, ca. 8 mm in diam., lower tube purple with white patches, densely pubescent, ca. 6 mm in diam., upper tube, inside purple; limb subrotundate-peltate, lobes yellowish brown with tiny papillae, forming a wide campanulate limb in the center, ca. 1.8 cm in diam. Etymology: The specific epithet ‘wenshanensis’ refers to the type locality where the new species was found, Wenshan City, Yunnan Province, China. Distribution and Ecology: Aristolochia wenshanensis is currently known from the type locality in karst region with two populations and 6 individuals; it is also distributed in Gejiu City, Honghe Hani and Yi Autonomous Prefecture after consulting other scholars (pers. communication, Meng-Qi Han, Institute of Botany, Chinese Academy of Sciences). The species grows on shaded slopes of karst landform under the evergreen broad-leaved forests and climbs on other woody plants. Lei Cai, De-Ming He, Yu-Song Huang and Zhi-Ling Dao. 2020. Aristolochia wenshanensis, A New Species of Aristolochiaceae from Karst Region in southeastern Yunnan, China. Taiwania. 65(1); 41-46. DOI: 10.6165/tai.2020.65.41 |
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