identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
94674BEB32B0544797A9D13C581C11F9.text	94674BEB32B0544797A9D13C581C11F9.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pittosporum qibainongense Y. S. Huang, Yan Liu & Y. F. Deng 2026	<div><p>Pittosporum qibainongense Y. S. Huang, Yan Liu &amp; Y. F. Deng sp. nov.</p><p>Figs 1, 2, 3 (A – F)</p><p>Diagnosis.</p><p>The new species is morphologically similar to P. trigonocarpum H. Lév. in leaves clustered at branchlet apex, blades obovate or oblong-lanceolate, umbellate inflorescences terminal and capsules usually dehiscing by 3 valves, but can be easily distinguished from the latter by lateral veins 6–9 pairs, conspicuous on both surfaces (vs. 6 pairs, inconspicuous on both surfaces), petioles 6–8 mm long (vs. ca. 1 cm long), pedicels 1–1.5 cm long, glabrous or sparsely puberulous (vs. 1–2.5 cm long, glabrous), capsules multiple, rare solitary, ovate or obovoid, glabrous (vs. solitary, triangular or globose, puberulous), seeds 10–25, 6–8 mm long (vs. 9–15, 5–6 mm long), and funicle at lower middle part of placenta (vs. scattered on the elongated placenta).</p><p>Type.</p><p>China • Guangxi Zhuang Autonomous Region: Hechi City, Dahua County, Qibainong Town, Nongliang Village, Waixian, alt. 993 m, 24 November 2024, J. Q. Huang, Z. C. Lu &amp; Y. S. Huang Y 24112401 (holotype: IBK 00470801!, isotypes: IBK 00470802!, IBSC!, PE!) .</p><p>Description.</p><p>Evergreen shrubs, 1.5–3 m tall. Branchlets sparsely puberulous when young, then glabrescent, sparsely lenticellate. Leaves alternate, clustered at branchlet apex; petiole 6–8 mm long, flat, the upper part narrow-winged, glabrous; blades leathery, obovate or oblong-lanceolate, 5–9 cm long, 1.5–4 cm wide, apex mucronate, acuminate or obtuse, margin entire, strongly revolute after drying, base cuneate, slightly decurrent, adaxially dark green, shiny, glabrous, abaxially pale green, sparsely puberulous when young, then glabrescent, midvein concave adaxially, prominent abaxially; lateral veins 6–9 pairs, slightly concave adaxially, prominent abaxially, curved arches meet near the margin, reticulate veins inconspicuous on both surfaces. Inflorescences borne on leaf axils at branchlet apex, umbellate, 2–8 - flowered; pedicels 1–1.5 cm long, glabrous or sparsely puberulous; bracts ovate or ovate-lanceolate, 2–4 mm long, ca. 1.5 mm wide, margin ciliate; sepals 5, free, ovate-lanceolate, lanceolate, rarely ovate, 2–4 mm long, 1–2 mm wide, margin ciliate; petals 5, free, yellow or pale yellow, 1–1.5 cm long, 2–3 mm wide, apex reflexed, glabrous; stamens 5, 7–8 mm long, filaments glabrous, anthers dorsifixed, arrow-shaped; pistil 6–9 mm long, ovary densely puberulous, carpels 3, rarely 4, placentas at lower middle part, each carpel with 3–8 ovules, style 3–5 mm long, glabrous. Capsule ovate or obovoid, 1.5–3 cm long, 1–1.6 cm in diam., glabrous, rough when dry, dehiscing by 3 (or rarely 4) valves; pericarp 1.2–1.8 mm thick; seeds 10–25, red, nearly globose, or irregular polygon, 6–8 mm long, 5–7 mm in diam.; funicle flat, 2–3 mm long.</p><p>Phenology.</p><p>Pittosporum qibainongense was observed flowering from April to May and fruiting from October to December.</p><p>Etymology.</p><p>The specific epithet refers to the type locality, Qibainong National Geopark in Guangxi, China. The Chinese name is given as “ 七百弄海桐 (pinyin: qī bǎi nòng hǎi tǒng). ”</p><p>Distribution and habitat.</p><p>Thus far, Pittosporum qibainongense is only known from its type locality, Dahua County of Guangxi, China. It grows near the peak of limestone hills or hillside at an elevation of ca. 1000 m. The slope direction is to the southeast, and the slope gradient is ca. 50 °. The tree layer is up to 8 m tall with a canopy cover of 85 %, and the shrub and herb layer covers are 65 % and 25 %, respectively. The symbiotic plants include Carpinus rupestris A. Camus ( Betulaceae), Myrsine seguinii H. Lév. ( Primulaceae), Platycarya strobilacea Siebold &amp; Zucc. ( Juglandaceae), Fraxinus insularis Hemsl. ( Oleaceae), Pittosporum tonkinense Gagnep. and P. lenticellatum Chun ex H. Peng &amp; Y. F. Deng ( Pittosporaceae), Pistacia weinmanniifolia J. Poiss. ex Franch. ( Anacardiaceae), Viburnum triplinerve Hand. - Mazz. ( Viburnaceae), Alyxia sinensis Champ. ex Benth. ( Apocynaceae), Leptodermis hechiensis R. J. Wang ( Rubiaceae), Acer sycopseoides Chun ( Sapindaceae), Sageretia thea (Osbeck) M. C. Johnst. ( Rhamnaceae), and Miscanthus sinensis Andersson ( Poaceae).</p><p>Conservation status.</p><p>Although field surveys have been conducted in the karst areas of Dahua County for more than 10 years, no more than five subpopulations have been found at the type locality and its vicinity. It is obvious that its Extent of Occurrence (EOO) is relatively narrow, the distribution points are rare, and the Area of Occupancy (AOO) is extremely limited. Based on field surveys of the subpopulations, there are phenomena such as deforestation and grazing by local residents and environmental pollution caused by tourism development in their habitat. The influence of these factors is still ongoing. Therefore, we speculate that its habitat quality and population size have a downward trend. According to the Guidelines for Using the IUCN Red List Categories and Criteria (IUCN 2024), P. qibainongense is assessed as Endangered (EN) based on criteria [B 1 ab (iii, v) + 2 ab (iii, v)] (IUCN 2012).</p><p>Additional specimens examined</p><p>(paratypes). China • Guangxi Zhuang Autonomous Region: Hechi City, Dahua County, Qibainong Town, Nongliang Village, Waixian, alt. 1050 m, 5 October 2023, W. B. Xu, Z. C. Lu, M. L. Chang &amp; J. Q. Huang 17576 (IBK) ; • the same locality, alt. 1000 m, 4 November 2023, M. X. Li LMX 0106 (IBK); • the same locality, alt. 1130 m, 11 April 2024, W. B. Xu, Z. C. Lu, M. L. Mo, S. L. Chang &amp; J. Q. Huang 18086 (IBK, IBSC); • the same locality, alt. 910 m, 11 April 2024, W. B. Xu, Z. C. Lu, M. L. Mo, S. L. Chang &amp; J. Q. Huang 18088 (IBK, PE); • the same locality, alt. 1020 m, 11 April 2024, W. B. Xu, Z. C. Lu, M. L. Mo, S. L. Chang &amp; J. Q. Huang 18057 (IBK) .</p><p>Notes.</p><p>The morphological characteristics of the genus Pittosporum are highly heteroblastic due to differences in habitats or different growth periods, such as leaf size and shape, inflorescence and infructescence structure, etc. (Cayzer et al. 2023).</p><p>However, the number of parietal placentas is an important taxonomic characteristic of the genus Pittosporum . Morphologically, P. qibainongense is also similar to P. podocarpum, P. omeiense, and P. kweichowense in leaf shape, umbellate inflorescences, and the same number of parietal placentas, in addition to P. trigonocarpum . However, it can be easily distinguished from P. podocarpum by petioles 6–8 mm long (vs. 8–15 mm long), pedicels 1–1.5 cm long, glabrous or sparsely puberulous (vs. 2–3 cm long, glabrous), capsules glabrous, stipe inconspicuous (vs. puberulous, stipe 5–8 mm long), seeds 10–25 (vs. 8–10), funicle 2–3 mm long (vs. 3–4 mm long); from P. omeiense by lateral veins 6–9 pairs (vs. ca. 5 pairs), capsules ovate or obovoid (vs. ellipsoid), seeds 10–25, 6–8 mm long (vs. 7–8, 3–4 mm long); and from P. kweichowense by lateral veins 6–9 pairs, conspicuous on both surfaces (vs. 5–6 pairs, inconspicuous on both surfaces), petioles 6–8 mm long (vs. ca. 5 mm long), pedicels 1–1.5 cm long (vs. 4–7 mm long), ovary densely puberulous (vs. glabrous or sparsely puberulous), capsules multiple or solitary, 1.5–3 cm long, glabrous, stipe inconspicuous (vs. solitary, 1–1.5 cm long, puberulous, stipe less than 2 mm long), seeds 10–25 (vs. 6–8). A detailed morphological comparison among them is summarized in Table 1. A key to P. qibainongense and its morphologically similar species is provided below.</p><p>The floral dimorphism of Pittosporum is an interesting phenomenon. Most species of Pittosporum have functionally unisexual flowers. However, the flowers of P. qibainongense are bisexual. In fact, all species of Pittosporum in China are bisexual, and only a tendency for separation of sexes has been observed in a few species. Previous studies have shown that species of Pittosporum are evolving from functional dioecism to monoecism (Schlessmann 2010; Schlessman et al. 2014). P. qibainongense is an evergreen shrub and can be used as an excellent landscaping tree because of its beautiful tree form, flowers, and fruits. It is adaptive to karst areas and has important application value in karst mountain greening.</p><p>Key to P. qibainongense and its similar species</p></div>	https://treatment.plazi.org/id/94674BEB32B0544797A9D13C581C11F9	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	Huang, Yu-Song;Lu, Zhao-Cen;Liu, Yan;Deng, Yun-Fei	Huang, Yu-Song, Lu, Zhao-Cen, Liu, Yan, Deng, Yun-Fei (2026): Pittosporum qibainongense (Pittosporaceae), a new species from karst areas of southwest China. PhytoKeys 271: 273-282, DOI: 10.3897/phytokeys.271.185044
