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Issue: Vol. 591 No. 2: 4 April 2023
Type: Article
Published: 2023-04-04
DOI: 10.11646/phytotaxa.591.2.7
Page range: 155-163
Abstract views: 145
PDF downloaded: 3

Aristolochia laotica (subgen. Siphisia), a new species from Northeastern Laos

Vietnam National Museum of Nature, Vietnam Academy of Science & Technology, 18thHoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam. Graduate University of Science and Technology, Vietnam Academy of Science & Technology, 18th Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam.
Bac Giang Agriculture and Forestry University, Bich Dong, Viet Yen, Bac Giang, Vietnam
Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, CN-541006 Guilin, China
Institut für Botanik, Technische Universität Dresden, Zellescher Weg 20b, D-01062 Dresden, Germany. Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México 04510 Mexico City, Mexico
Monitor Geological Services, Phou Koud District, Xieng Khouang, Laos
Faculty of Forest Science, National University of Laos, Vientiane, Laos
Aristolochiaceae flora of Laos new taxon Piperales Magnoliids

Abstract

Aristolochia laotica, a new species from Northeastern Laos, is described and illustrated here. The horseshoe-shaped perianth tube, the 3-lobed limb, and the 3-lobed gynostemium support its placement into Aristolochia subgenus Siphisia. Of the species with cylindric or saccate-shaped limb, the new species resembles A. vuquangensis. However, it differs from the latter by having an oblanceolate to narrowly elliptic leaf lamina with a truncate to shallowly cordate base, pinnate veins, sparsely brown hirsute to glabrescent perianth, uniformly purple inner surface of utricle, indistinct, straight, strongly inflated limb lobes, and pubescent and warty inner surface of the limb lobes. Detailed description, color illustrations, and remarks on ecology, conservation status are also provided, along with a key to species reported in Laos and comparison with its similar species.

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