identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
FEB62E9DC5B9557D8C1ABD9AFEDB2703.text	FEB62E9DC5B9557D8C1ABD9AFEDB2703.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Gastrochilus obovatifolius C. Xiong, X. Y. Fu & S. R. Yi 2025	<div><p>Gastrochilus obovatifolius C. Xiong, X. Y. Fu &amp; S. R. Yi sp. nov.</p><p>Figs 3, 4</p><p>Diagnosis.</p><p>Gastrochilus obovatifolius is most similar to  G. balangshanensis ., but differs by the longer stem (3–5 vs. 1.5–3.5 cm), obovate leaves (vs. nearly elliptic), and smaller sepals (ca. 5.0 × 3.0–4.0 vs. 5.6–6.4 × 4.8–5.2 mm) and hypochile (4.0–4.5 × 4.0–4.2 vs. 6.0–8.0 × 5.8–7.5 mm).</p><p>Type.</p><p>China • Chongqing: Chengkou County (城口县), Dong’an Town (东安镇), <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=109.183334&amp;materialsCitation.latitude=31.7" title="Search Plazi for locations around (long 109.183334/lat 31.7)">Lizishuping</a> (栗子树坪), 31°42′N, 109°11′E, alt. ca. 1650 m, 30 March 2024, Si-Rong Yi et al. YSR 2703 (holotype IBK!, isotype CGMC!)  .</p><p>Description.</p><p>Epiphytic herbs, monopodial, pendent, with a short stem, 3.0–5.0 cm long, leafy. Roots vermiform, slender, 4.0–6.0 cm long and ca. 1 mm in diameter. Stems short, branched, green, glabrous, up to 5 cm long and ca. 2.0 mm in diameter, covered with sheathing leaf bases; sheaths with purplish-red spots; internodes 1.2–1.8 mm long. Leaves alternate, distichous, obovate, fleshy, 1.4–1.6 × 0.6–0.8 cm, margin entire, apex acute, obscurely serrate; young leaves yellow-green with a few purplish-red spots, mature leaves green with hardly any purplish-red spots. Inflorescences 1–2 racemes, usually arising from the axil of an upper leaf, 2.0– 2.5 cm long, 1–2 - flowered; peduncle 0.8–1.2 cm long; bracts 1.0–2.0 mm long. Flowers 1.2–1.4 × 1.0– 1.2 cm, yellow-green, with dark purple stripes on petals and sepals, raised abaxially along the midrib; pedicel and ovary yellowish-green with purple-red spots, 1.5–1.6 cm long. Dorsal sepal elliptic, concave, ca. 5.0 × 4.0 mm, apex obtuse; lateral sepals similar to dorsal sepal, slightly oblique, ca. 5.0 × 3.0 mm, apex obtuse; petals oblong, concave, ca. 6.0 × 3.0 mm, apex obtuse. Labellum epichile reniform, yellow-green with purplish-red spots, 1.0–1.2 × 0.6–0.8 cm, revolute, margin erose, smooth and glabrous above, median patch, thickened, with 2 low ridges, dark purple; hypochile sub-hemispherical, yellow-green, mouth with lateral purplish-red markings, sac with purplish-red spots on the underside, obtuse at the apex, 4.0– 4.5 mm tall, 4.0– 4.2 mm in diameter, dorsally compressed, slightly bent outward. Column stout, ca. 2.0 × 1.2 mm; rostellum bilobed; anther cap galeate with curved emarginate beak, ca. 1.0 × 1.2 mm; pollinia 2, ca. 0.8 × 0.6 mm, yellow, nearly spherical, entire, with a depression in the center; stipe elongate, ca. 1.2 mm long, viscidium yellow, elliptic, ca. 0.8 × 0.4 mm. Capsule not seen.</p><p>Phenology.</p><p>Flowering from March to April.</p><p>Etymology.</p><p>The specific epithet  ‘ obovatifolius ’ refers to the highly distinctive obovate leaves. The suggested Chinese common name is “ dào luǎn yè pén jù lán (倒卵叶盆距兰) ”.</p><p>Distribution and ecology.</p><p>The new species has only been recorded in Chengkou County, northeast Chongqing Municipality, bordering Shaanxi Province, China (Fig. 6). It grows as a trunk epiphyte on  Quercus engleriana Seemen, in evergreen broad-leaved forest at an elevation of 1620–1650 m a. s. l. (Fig. 5). Besides  Q. engleriana, the most frequent co-occurring angiosperm species include  Fargesia spathacea Franch.,  Hepatica henryi (Oliv.) Steward,  Pieris japonica (Thunb.) D. Don ex G. Don,  Rhododendron adenopodum Franch., and  Zanthoxylum dimorphophyllum Hemsl.</p><p>Additional specimens examined (paratypes).</p><p>China • Chongqing: Chengkou County (城口县), Dong’an Town (东安镇), <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=109.2&amp;materialsCitation.latitude=31.7" title="Search Plazi for locations around (long 109.2/lat 31.7)">Dongjiachang</a> (董家厂), 31°42′N, 109°12′E, alt. ca. 1620 m, 8 April 2024, Si-Rong Yi et al. YSR 2733 (IBK!, CGMC!)  .</p></div>	https://treatment.plazi.org/id/FEB62E9DC5B9557D8C1ABD9AFEDB2703	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Xiong, Chi;Fu, Xiao-Ying;Tan, Ke;Huang, Ya;Zhang, Hong-Jing;Wang, Yi-Chen;Yang, Yu-Bing;Yi, Si-Rong	Xiong, Chi, Fu, Xiao-Ying, Tan, Ke, Huang, Ya, Zhang, Hong-Jing, Wang, Yi-Chen, Yang, Yu-Bing, Yi, Si-Rong (2025): Gastrochilus obovatifolius (Orchidaceae, Aeridinae), a new species from the Daba Mountains of Chongqing, China. PhytoKeys 252: 25-40, DOI: 10.3897/phytokeys.252.133501
