identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
8407D93981845EF5A3268493F462E301.text	8407D93981845EF5A3268493F462E301.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Breynia phongquangensis T. H. Bui & N. H. Le 2026	<div><p>Breynia phongquangensis T. H. Bui &amp; N. H. Le sp. nov.</p><p>Figs 1, 2</p><p>Type.</p><p>Vietnam • Tuyen Quang Province, Minh Tan Commune, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.89072&amp;materialsCitation.latitude=22.943583" title="Search Plazi for locations around (long 104.89072/lat 22.943583)">Phong Quang Nature Reserve</a>, 22°56'36.90"N, 104°53'26.59"E, alt. 730 m, 22 March 2026, T. B. Tran, V. H. Do, T. C. Nguyen, T. H. Duong, N. H. Le, N. M. Trinh, A. T. Vu, D. B. Tran, VAST-PQ 74 (holotype: HN 000083328!; isotypes: HN 000083329!, HN 000083330!, HN 000083331!, HN 000083332!, HN 000083333!, HN 000083334!, HN 000083335!, VNM 00078331!) .</p><p>Diagnosis.</p><p>Breynia phongquangensis differs from B. macrantha, B. phuongiana, and B. spatulifolia in having fleshy staminate sepals. It is further distinguished from B. spatulifolia by its larger staminate flowers and different number of lateral veins; from B. macrantha by the shorter outer sepals of the pistillate flowers; and from B. phuongiana by its distinct fruit shape. In addition, B. phongquangensis possesses longer ovaries and fruits than all three allied species, as well as longer pistillate flower pedicels than those of B. phuongiana and B. spatulifolia .</p><p>Description.</p><p>Shrubs 4–5 m tall, erect, monoecious, glabrous throughout; branchlets slightly zigzag, angular when young, terete with age, slender, green, internodes 21–37 mm long. Stipules persistent, triangular with a long acumen, 3.5 × 1.0 mm, greenish-brown. Leaves simple, distichous, short petiolate; petiole 3–5 mm long; leaf blade ovate, obovate, elliptic to oblong-elliptic, lanceolate, 45–153 × 29–52 mm, glabrous at both surfaces, cuneate, retuse or acuminate at base, acuminate to round at apex, with entire margin; venation pinnate with lateral veins in 6–8 pairs, elevated abaxially, reticulate veins obvious, flattened adaxially, unclear interconnected near the margin. Inflorescence axillary or cauliflorous, 1–6 - flowered, peduncle absent or very short; bracts triangular. Flowers actinomorphic, pedicellate. Staminate flowers: pedicel slender, 3.5–8.6 mm long, glabrous; calyx shallowly disk-shaped, 4.9–5.8 cm in diameter, pink-red mottled with white, 6 - lobed, thick 0.4–0.7 mm, fleshy; calyx lobe apex round to slightly emarginate, 1.0–1.5 × 1.1–1.7 mm; two surfaces mottled with white; androphore pale yellow, very short, 0.1–0.2 mm long; stamens three, inserted at lobe apex; anthers 0.36–0.41 mm long, dehiscing by longitudinal slits, extrorse. Pistillate flowers 0.43–0.66 cm in diameter; pedicel 16–53 mm long; calyx pink-red mottled with white, 6 - lobed; sepals with two types (biseriate), three inner sepals broadly ovate, 3.0–3.2 × 3.0– 3.6 mm, three outer sepals broadly obovate, apex emarginate, 3.7–4.6 × 2.5–3.6 mm. Ovary in transversal section nearly circular, 3.7–4.9 mm in diameter, with three blunt angles, 3 - locular; stigmas three, bifid up to 3 / 4 their length, recurved; ovules two per locule, white. Fruit globose, 27 mm in diameter, when open composed of three free lobes, each lobe has a vertical stripe down the middle, outer fruits pink-red, inner fruits white, calyx persistent. Seeds 3 - sided, each side surface ovate, glabrous, white, 22–23 × 13–14 mm.</p><p>Etymology.</p><p>The specific epithet refers to the type locality, Phong Quang Nature Reserve, Tuyen Quang Province, in Vietnam.</p><p>Distribution and ecology.</p><p>Breynia phongquangensis is found only in Vietnam, Tuyen Quang Province, Phong Quang Nature Reserve, where it grows in the evergreen broadleaf forests on a limestone mountain in association with Burretiodendron tonkinense (A. Chev.) Kosterm., Claoxylon indicum (Reinw. ex Blume) Hassk., Euonymus bockii Loes. ex Diels, Fissistigma latifolium (Dunal) Merr., Hoya vangviengiensis Rodda &amp; Simonsson, Micromelum hirsutum Oliv., Miliusa balansae Finet &amp; Gagnep., and Vanilla somai Hayata. Flowering and fruiting specimens were collected in March and April 2026.</p><p>Conservation status.</p><p>Breynia phongquangensis is currently known only from its type locality in Phong Quang Nature Reserve, Tuyen Quang Province, and its occurrence in other areas has not yet been evaluated. During field observations, no immediate threats to the species were observed within the nature reserve. The locality also harbors several threatened species, including Burretiodendron tonkinense, assessed as Near Threatened (NT) (IUCN 2025) and Endangered (EN) (Tran et al. 2024); and Vanilla somai, assessed as Endangered (EN) (IUCN 2025), highlighting the conservation importance of this area. However, B. phongquangensis inhabits rugged rocky montane habitats that are difficult to access, even for botanical surveys. Consequently, the population size and number of mature individuals remain unknown. Therefore, the species is here assessed as Data Deficient (DD) according to the IUCN Red List Categories and Criteria (IUCN 2025).</p></div>	https://treatment.plazi.org/id/8407D93981845EF5A3268493F462E301	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	Le, Ngoc Han;Tran, The Bach;Do, Van Hai;Tran, Duc Binh;Duong, Thi Hoan;Bui, Thu Ha	Le, Ngoc Han, Tran, The Bach, Do, Van Hai, Tran, Duc Binh, Duong, Thi Hoan, Bui, Thu Ha (2026): Breynia phongquangensis (Phyllanthaceae), a new species from Vietnam. PhytoKeys 275: 133-140, DOI: 10.3897/phytokeys.275.195982
