identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
02EA8B4BB00454C59CD9BBC0D656A3F8.text	02EA8B4BB00454C59CD9BBC0D656A3F8.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Ophiorrhiza xinchengensis Y. Nong & G. Y. Wei 2026	<div><p>Ophiorrhiza xinchengensis Y. Nong &amp; G. Y. Wei sp. nov.</p><p>Figs 1, 2, 3, 4</p><p>Chinese name.</p><p>“ xīn chéng luó xù cǎo ” (忻城螺序草).</p><p>Diagnosis.</p><p>Ophiorrhiza xinchengensis is resembles Ophiorrhiza longanensis (R. J. Wang) Razafim. &amp; Rydin in its densely pubescent stems, linear stipules, terminal or upper axillary inflorescences, but it can be distinguished by its elliptic or oblanceolate leaf blade, base attenuate (vs. oval, ovate to broadly ovate, base cuneate), its 2–3 mm long stipules (vs. 3.8–6.5 mm long), its 3–5 mm long bracteoles (vs. 6–10 mm long), its 10–12 mm long corolla tubes (vs. 2–3 mm long) and its filaments adnate at the middle of corolla tube, styles 12–15 mm long (vs. adnate to the base of corolla tube, styles ca. 3 mm long).</p><p>Type.</p><p>China • Guangxi: Xincheng County; 25°28'N, 108°53'E, alt. 400 m; 1 February 2026; Gui-Yuan Wei WGY 2026020101 (GXMI). (Holotype: 051219 · GXMI!; isotypes: IBK!) .</p><p>Description.</p><p>Perennial herbs, decumbent, not rooting at nodes; stem terete, densely villous; stipules linear, 1–2 mm long, densely villous; petiole 5–10 mm, densely villous; leaf blade drying papery, elliptic or oblanceolate, 2–5 × 1–1.8 cm, densely pubescent adaxially and abaxially, base attenuate, apex obtuse to rounded; secondary veins 5–7 pairs. Stipules linear, densely pubescent, 2–3 mm long. Inflorescences terminal or upper axillary, corymbose-cymose, 6–15 flowered; peduncle 3–5 cm, pubescent; bracteoles linear, 3–5 mm long, densely pubescent; pedicels 1–2 mm, pubescent. Flowers distylous. Hypanthium obconical, 1–2 mm long, pubescent; lobes 5, linear-lanceolate, 1.5–2 mm long, pubescent. Corolla funnel-form, white, sparsely pubescent outside, tubes 10–12 mm long, ca. 1 mm wide; ovary 2 - celled, ovules on the axile placentas. Longistylous flower: corolla tube with a white pubescent ring of long hairs near the middle of the inside and sparsely pubescent above middle; lobes subovate, 5–6 × 4–5 mm, glabrous inside; stamens 5; anthers oblong-linear, ca. 1.5 mm long; stamens below the pubescent ring and included, filaments adnate at the middle of corolla tube, ca. 1 mm long; styles exserted, 12–15 mm long, glabrous, stigma lobes capitate, lobes 1–2 mm long. Brevistylous flower: corolla tube sparsely pubescent outside and densely pubescent inside; lobes subovate, 5–6 × 4–5 mm, glabrous inside; stamens 5; anthers oblong-linear, ca. 3 mm long; stamens exserted, filaments adnate at the throat of corolla tube, 4–5 mm long; styles 5–6 mm long, glabrous, stigma lobes capitate, lobes 2–3 mm long. Capsules ellipsoid, 2–3 mm long, densely pubescent, valves 4. Seeds numerous, angular, with reticulate patterns on the surface, ca. 0.2 mm in diam.</p><p>Etymology.</p><p>The specific epithet “ xinchengensis ” refers to the type location of the new species.</p><p>Distribution and habit.</p><p>Currently, Ophiorrhiza xinchengensis is known only from the middle of Guangxi, China (Fig. 5). It has been mainly found growing in a karst cave at an elevation of about 400 m.</p><p>IUCN red list category.</p><p>Based on our field surveys conducted in 2025–2026, we estimated the single known population of the new species to contain approximately 60–100 mature individuals. The extent of occurrence (EOO) is ca. 200 m 2 and the area of occupancy (AOO) is ca. 30 m 2. Following the IUCN Red List Categories and Criteria (IUCN 2024), we provisionally assess the species as Critically Endangered [CR B 1 + 2 ab (iii)] because of its extremely restricted distribution, single location and potential habitat degradation.</p><p>Additional specimen.</p><p>Xincheng • Southeast Guangxi: karst cave, 20 May 2025, fr. Y Nong NY 2025052001 (GXMI!) .</p></div>	https://treatment.plazi.org/id/02EA8B4BB00454C59CD9BBC0D656A3F8	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	Wei, Gui-Yuan;Li, Jin-Yue;Chen, Rong;Nong, You;Hu, Qi-Min;Li, Ying-Jing;Ji, Xing-Yun;Xu, Chuan-Gui;Nong, Yun-Kai	Wei, Gui-Yuan, Li, Jin-Yue, Chen, Rong, Nong, You, Hu, Qi-Min, Li, Ying-Jing, Ji, Xing-Yun, Xu, Chuan-Gui, Nong, Yun-Kai (2026): Ophiorrhiza xinchengensis (Rubiaceae), a new species from Guangxi, China. PhytoKeys 278: 1-14, DOI: 10.3897/phytokeys.278.194094
