Aristolochia xuanlienensis N. T. T Huong, B. H. Quang &amp; J. S Ma 2014, sp. nov.
Creators: name: Huong, Nguyen Thi Thanh
name: Hai, Do Van
name: Quang, Bui Hong
name: Cuong, Nguyen The
name: Khang, Nguyen Sinh
name: Vu, Dang Quoc
name: Ma, Jin-Shuang
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Piperales
Aristolochiaceae
Aristolochia
Aristolochia xuanlienensis

description: <i>Aristolochia xuanlienensis</i> N.T.T Huong, B. H. Quang &amp; J. S Ma, <i>sp. nov.</i> (Figs. 1, 2) <i>Aristolochia xuanlienensis</i> is similar to <i>A. hainanensis</i> Merrill (1922: 341), <i>A. balansae</i> Franchet (1898: 311) and <i>A. quangbinhensis</i> Do (2014: 52), but its white perianth with light purple veins on the outside and dark purple spots both in tube and on limb has never been reported before among the Asian species. Type:— VIETNAM. Thanh Hoa Province: Xuan Lien Nature Reserve, 19°59’44.5’’N, 105°00’08.7’’E, elevation about 870 m, 7 November 2011, <i>Hai, Quang, Cuong, Vu, Thanh &amp; Thanh 129</i> (holotype HN 00000 68875; isotypes: CSH). Other specimens examined:— VIETNAM. Thanh Hoa Province: Xuan Lien Nature Reserve, 19°50’51.3’’N, 105°14’40.6’’E, elevation about 200 m, 17 April 2014, <i>Huong, Hai, Quang &amp; Khang 105</i> (HN, VNMN). Liana with a woody stem, terete, striate, yellow, hairs brown, old branchlets glabrous, up to more than 1 cm in diameter. Leaves with the petioles 3–8 cm long, densely yellow-brown villous; leaf blade ovate or ovate-lanceolate to narrowly ovate, 12–25 x 7–15 cm, both surface densely villous when young, becoming glabrous when old; margin entire; veins palmate, 4–5 pairs from base; base rounded, apex acuminate. Racemes usually in axils of leafy shoots or on old woody stems, 3–4(–5) flowers, ca 3.5 cm long; peduncle often pendulous, ca. 3 cm long, densely pubescent. Perianth white with light purple veins outside and dark purple spots both in tube and on limb; limb obliquely trumpet-shaped, ca 2.5 cm in diameter, trilobed; lobes subequal, densely papillate, upper 2 oblong, lower one broadly deltoid. Gynostemium is with trilobed stigma on top, anthers 6 in 3 pairs, oblong, ca. 2 mm long. Capsule narrowly cylindric, yellow, 8.0–10.0 x 2.0– 2.5 cm. Seeds cordate, ca. 4–6 x 3–4 mm. <b>Vernacular name:—</b> Phòng kỷ Xuân Liên (Vietnamese) <b>Distribution and habitat:—</b> <i>Aristolochia xuanlienensis</i> is currently known only from Xuan Lien Nature Reserve, Thanh Hoa Province, Vietnam, at elevations between 200– 900 m. The new species usually grows in the understory of primary subtropical evergreen forests, along with tree species including <i>Raphidophora</i> sp, <i>Alocasia</i> sp., <i>Pothos</i> sp., <i>Paraborea</i> sp., <i>Tarenna latifolia</i> Pit., <i>Boehmeria</i> sp., <i>Ficus</i> sp, ferns and others. <b>Phenology:</b> —Flowering September–January and fruiting March–May. <b>Etymology:—</b> Named after the location of Xuan Lien, Thanh Hoa Province, Vietnam, to which the species is endemic. <b>Conservation status:—</b> Within Xuan Lien Nature Reserve, <i>Aristolochia xuanlienensis</i> is known only from a single population, with fewer than five individuals observed among our two expeditions in the past few years. It is therefore assigned a preliminary status of Vulnerable (VU) according to IUCN Red List criteria (IUCN, 2001), which indicates a population with a very restricted area (typically less than 20 km 2). More populations of this species remain to be found in similar habitats in the area. However, an extensive field survey is needed since the species is small liana that is inconspicuous in the forests and thus usually difficult to observe in the field.
description: Published as part of <i>Huong, Nguyen Thi Thanh, Hai, Do Van, Quang, Bui Hong, Cuong, Nguyen The, Khang, Nguyen Sinh, Vu, Dang Quoc &amp; Ma, Jin-Shuang, 2014, Aristolochia xuanlienensis, a new species of Aristolochiaceae from Vietnam, pp. 176-180 in Phytotaxa 188 (4)</i> on pages 176-179, DOI: 10.11646/phytotaxa.188.3.7, http://zenodo.org/record/5147403
description: {"references": ["Do, T. V, Nghiem, T. D., Wanke, S. &amp; Neinhuis, C. (2014) Arisotolochia quangbinhensis (Aristolochiaceae), a new species from central Vietnam. PhytoKeys 33: 51 - 59. http: // dx. doi. org / 10.3897 / phytokeys. 33.6094", "IUCN. (2001) IUCN Red List categories and criteria, Version 3.1. IUCN Species Survial Commission, Gland, Switzerland, and Cambridge, United Kingdom, 30 pp."]}