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| Aristolochia laotica T.V.Do, in Do, Hoang, Wen, Wanke, Forbes et Souladeth, 2023. |
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.
Keywords: Aristolochiaceae, flora of Laos, new taxon, Piperales, Magnoliids
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| Aristolochia laotica T.V.Do, sp. nov. A. Habitat; B. Mature stems; C. A branch bearing leaves; D. Adaxial and abaxial leaf surface; E. 2-flowered cyme on old woody stems; F. Two 1-flowered cymes on old woody stems. Photo credits, M. Forbes. |
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| Aristolochia laotica T.V.Do, sp. nov. A. Leaves; B. Inner surface of limb and annulus (indicated by a green arrow); C. Longitudinal section of perianth; D. Lateral view of perianth; E. Dorsal view of perianth; F. Ventral view of perianth G. Top and frontal view of perianth; H. Lateral view of gynostemium; I. Top view of gynostemium; J. Capsule. Photo credits, M. Forbes. |
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| Comparison of morphological traits of Aristolochia laotica T.V.Do, sp. nov. with A. vuquangensis and A. versicolor. A-D. Aristolochia laotica. A. Leaf shape; B. Lateral view of perianth; C. Longitudinal section of perianth; D. Ventral view of perianth. E-H. A. vuquangensis. E. Leaf shape; F. Lateral view of perianth; G. Longitudinal section of perianth; H. Ventral view of perianth. I-K. A. versicolor. I. Leaf shape; J. Longitudinal section of perianth; K. Frontal and dorsal view of perianth. Photo credits, A-D, M. Forbes; E-K, Do Van Truong. |
Truong Van Do, Thao Thi Hoang, Fang Wen, Stefan Wanke, Malcolm Forbes, Phetlasy Souladeth. 2023. Aristolochia laotica (subgen. Siphisia), A New Species from Northeastern Laos. Phytotaxa. 591(2); 155-163. DOI: 10.11646/phytotaxa.591.2.7
ວັນທີ 4 ເມສາ 2023 ວາລະສານ Phytotaxa ໄດ້ເຜີຍແຜ່ພືດຊະນິດໃໝ່ຂອງໂລກ Aristolochia laotica (subgen. Siphisia) ຈາກພາກຕາເວັນອອກສ່ຽງເໜືອລາວ ເມືອງພູກູດ ແຂວງຊຽງຂວາງ
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