identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
7A73B8A4DEC555FB907D747D545CAA7F.text	7A73B8A4DEC555FB907D747D545CAA7F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Argostemma baotingense S. P. Dong & H. B. Yang 2026	<div><p>Argostemma baotingense S. P. Dong &amp; H. B. Yang, sp. nov.</p><p>Fig. 1</p><p>Type.</p><p>China. Hainan: Baoting County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=109.54066&amp;materialsCitation.latitude=18.559412" title="Search Plazi for locations around (long 109.54066/lat 18.559412)">Tonganling Mountain</a>, on the rocks of the valley in the forest, 18.55941219, 109.54065926, alt. 730 m, 30 May 2025, Shu-Peng Dong, Jian-Qi Dong, Long-Wei Pang DSP 202503 (holotype: ATCH, isotype: IBSC 1104113, 1104114) .</p><p>Diagnosis.</p><p>The new species is morphologically similar to A. bachmaense T. V. Do but differs by the suberect or creeping stem (vs. erect), the linear leaves (vs. oblanceolate to spatulate), glabrous inflorescence (vs. pubescent), glabrous calyx (vs. pubescent). A detailed morphological comparison between the two species is provided in Table 1. Photographs of seven Argostemma species in China have been provided (Fig. 2). A key to all the nine species of Argostemma in China is also provided at the end of the text.</p><p>Description.</p><p>Lithophytic herbs. Stem 5–15 cm tall, ca. 3 mm in diameter, glabrous, suberect or creeping, internodes 4–9 mm long, terete. Stipules persistent, broadly ovate, 3–4 × 2–3 mm, glabrous, apex acuminate, margin entire. Leaves opposite, slightly anisophyllous, petiole 3–5 mm long, blade linear, 1.1–5 × 0.3–0.6 cm, apex obtuse, margin undulate and strigose, attenuate at base, adaxial surface glossy, dark green, strigose on midrib and sometimes near margins, protuberance on both surfaces, abaxial surface silvery white, glabrous, lateral veins 7–11 pairs, conspicuous adaxially, not visible abaxially. Inflorescence terminal, white, 1 - or 2 - flowered, peduncle glabrous, ca. 8 mm long, bracts 4, ovate to linear, 3–4 × 1–2 mm, persistent and glabrous, pedicel ca. 11 mm long. Calyx lobes 5, light green, triangular, glabrous, ca. 3 mm long. Corolla white, rotate, glabrous; tube ca. 2 mm long; lobes 5, lanceolate, 10–12 × 4–5 mm, apex acuminate. Stamens 5, ca. 8 mm long; anthers coherent, yellow, dehiscent by longitudinal slits, with connective prolonged, filaments short, ca. 1 mm long, straight, yellow. Ovary inferior, ovules numerous, style ca. 9 mm long, white, stigma columnar, ca. 0.5 mm long, simple, exserted.</p><p>Phenology.</p><p>The new species was observed flowering from May to June.</p><p>Etymology.</p><p>The specific epithet ‘ baotingense ’ is derived from the type locality, Baoting County. The Chinese name is given as ‘ 保亭雪花’ (Pinyin: bǎo tíng xuě huā).</p><p>Distribution.</p><p>The new species is known only from the type locality (Fig. 3).</p><p>Habitat.</p><p>It grows on rocks in valleys in the forest. Living plants introduced from the type locality are currently cultivated in the nursery of the Tropical Crops Genetic Resources Institute of the Chinese Academy of Tropical Agricultural Sciences.</p><p>Conservation status.</p><p>Currently, only a single population has been found in the valleys of the Tonganling Mountain forest in Hainan, but its population size is relatively large, and it can reproduce asexually through stems. Argostemma baotingense may occur in other areas. As its broader distribution has not yet been fully investigated, it is recommended that it be classified as Data Deficient (DD) under the IUCN Red List criteria (IUCN 2026).</p></div>	https://treatment.plazi.org/id/7A73B8A4DEC555FB907D747D545CAA7F	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	Dong, Shu-Peng;Yuan, Lang-Xing;Wang, Qing-Long;Yang, Hu-Biao	Dong, Shu-Peng, Yuan, Lang-Xing, Wang, Qing-Long, Yang, Hu-Biao (2026): Argostemma baotingense (Rubiaceae), a new species from Hainan Island, South China. PhytoKeys 276: 253-260, DOI: 10.3897/phytokeys.276.195404
