identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
625287B9FF94A11FDAC569FD29EBC95B.text	625287B9FF94A11FDAC569FD29EBC95B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Begonia minhaniae T. S. Hoang & C. W. Lin. A, B. Habit 2022	<div><p>Begonia minhaniae T.S.Hoang &amp; C.W.Lin, sp. nov. § Platycentrum (Figs. 2 &amp; 3)</p><p>Type:— VIETNAM: Yen Bai province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.34175&amp;materialsCitation.latitude=21.707777" title="Search Plazi for locations around (long 104.34175/lat 21.707777)">Van Tran District</a>, 21.707777N, 104.341748E, 512 m elevation, 22 July 2021, flowers and fruits, Hoang Thanh Son 8754 (Holotype VAFS; Isotypes VNMN) .</p><p>Monoecious rhizomatous herb. Rhizome stout, reddish-brown, 3–5 cm or longer, 5−7 mm thick, internodes 2−7 mm long, sparsely pale brown tomentose. Stipules often caducous, yellow tinged crimson, triangular to very widely ovate-triangular, 4–6 × 3–7 mm, herbaceous, keeled, glabrous or abaxially sparsely tomentose, margin ciliate, apex obtuse to rounded and mucronate. Leaves alternate, petiole terete, brownish-red to crimson, 4−10 cm long, 2−4.5 mm diameter, densely subappressed yellowish-brown tomentose; leaf blade asymmetric, oblique, widely ovate, 8.5−12.5 × 6–9.5 cm, broad side 3.6–5.5 cm wide, basal lobes cordate, 1.6–3 cm long, apex acute to acuminate, margin subentire to crenulate with a line of red puberulous hairs; leaf chartaceous, succulent, adaxially lime green, glabrous; abaxially pale green, glabrous except on veins; venation basally ca. 7 palmate, veins green adaxially, yellowish-green and sparsely red puberulous abaxially; midrib distinct, ca. 2 secondary veins on each side, other primary veins branching dichotomously or nearly so, tertiary veins reticulate. Inflorescences axillary, bisexual, cymose arising directly from rhizome, ca. 2 orders of branching; peduncle reddish-green to crimson, ca. 10 cm long, sparsely yellowish-brown tomentose. Bracts caducous, yellowish-red to pale brown, at basal node of inflorescence ovate, ca. 4 × 2 mm, abaxially sparsely yellowish-brown tomentose or glabrous, margin ciliate; bracts of upper inflorescence similar but smaller. Staminate flower: pedicel yellowish-red, ca. 2 cm long, very sparsely yellowish-brown tomentose, tepals 4, pink, outer 2 orbicular to very widely ovate, ca. 1 cm across, adaxially very sparsely puberulous or glabrous, margin entire, apex rounded, inner 2 elliptic, ca. 10 × 6 mm, glabrous, apex rounded; androecium zygomorphic, ca. 3.5 mm across; stamens golden yellow, ca. 15; filaments ca. 2 mm long, fused at base; anthers obovate, ca. 1.5 mm long, 2-locular, apex slightly retuse. Pistillate flower (immature): pedicel ca. 5 mm long with a pairs alternate bracteoles ca. 2 × 1 mm, ciliate; sparsely yellowish-brown tomentose, tepals 3, pink, outer 2 orbicular, ca. 8 mm across, subglabrous; inner 1 obovate, ca. 7 × 2.5 mm; ovary trigonous-ellipsoid, ca. 5 × 2.5 mm; 3-winged, wings unequal, ca. 6 mm long, lateral wings narrower, narrowly triangular, abaxial wing triangular, margin entire, glabrous or sparsely tomentose; ovary 3-locular, placenta bilamellate; styles 3, fused at base, yellow, U-shaped, stigma spirally twisted. Capsule trigonousellipsoid, ca. 9 mm long, 6 mm thick (wings excluded), reddish-green when fresh; wings unequal, ca. 11 mm long, lateral wings ca. 2 mm wide, abaxial wing triangular, ca. 5 mm wide.</p><p>Distribution and ecology:— Begonia minhaniae is only known from the type locality in Van Tran District. It grows on moist cliff faces in shady lower primary evergreen broad-leaved forests, elevation ca. 512 m.</p><p>Etymology:— The species is named in honor of Ms. Minh An Hoang, the second daughter of the first author. She is always the first author’s motivation to research and find new species.</p><p>Conservation status:— We assess B. minhaniae to be Endangered based on criteria ENC2a(i) (IUCN 2022). This species has only four known populations in one single location with the number of mature individuals being less than 100, all of the populations were in areas which have no formal legal protection (its distribution overlapping the Mu Cang Chai Protection Forest, but it is not included on any national protected areas system). In the areas, the most prominent threat to the new species is deforestation, along with other human activities such as such as farming from around the habitat, which means it is prone to the risk of extinction due to chance events.</p><p>Notes:— Like Begonia phouchomvoyensis Lanors., Lamxay &amp; Souvann. (Lanorsavanh et al., 2020), this new species belongs to sect. Platycentrum. The two share several characters including rhizomatous habit, hairy petioles and abaxial lamina, 4-tepaled staminate flowers, pistillate flowers with 3 tepals and ovary 3 locules, but the new species can be distinguished by its stipule margin ciliate (vs. entire), the petiole densely subappressed yellowish-brown tomentose (vs. red villous), the leaf is glabrous on the adaxial surface (vs. strigose), the peduncle sparsely yellowish-brown tomentose (vs. red villous) and pedicel of pistillate flowers with two bracteoles (vs. bracteoles absent). A comparison of B. minhaniae and B. phouchomvoyensis is presented in Table 1. The character of pistillate flowers with unequal 3 tepals is uncommon in sect. Platycentrum, shared between B. phouchomvoyensis and B. minhaniae .</p></div>	https://treatment.plazi.org/id/625287B9FF94A11FDAC569FD29EBC95B	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.		Plazi	HOANG, THANH SON;LIN, CHE-WEI	HOANG, THANH SON, LIN, CHE-WEI (2022): Two new species, Begonia minhaniae and B. dieuanhiae (sect. Platycentrum, Begoniaceae), from northwestern Vietnam. Phytotaxa 572 (1): 87-96, DOI: 10.11646/phytotaxa.572.1.6, URL: http://dx.doi.org/10.11646/phytotaxa.572.1.6
625287B9FF91A11BDAC56EF52F6BC816.text	625287B9FF91A11BDAC56EF52F6BC816.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Begonia dieuanhiae T. S. Hoang & C. W. Lin. A, B. Habit 2022	<div><p>Begonia dieuanhiae T.S.Hoang &amp; C.W.Lin, sp. nov. § Platycentrum (Figs. 4 &amp; 5)</p><p>Type:— VIETNAM: Son La province, Moc Chau District, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.714294&amp;materialsCitation.latitude=20.702982" title="Search Plazi for locations around (long 104.714294/lat 20.702982)">Xuan Nha Nature Reserve</a>, 20.702981N, 104.714297E, 748 m elevation, 14 August 2021, flowers and fruits, Hoang Thanh Son 9014 (Holotype VAFS; Isotypes VNMN) .</p><p>Monoecious rhizomatous herb. Rhizome stout, to 10 cm or longer, 5−8 mm thick, internodes congested 2−7 mm long, densely bright reddish-brown tomentose or woolly; leafless erect stem seen only at anthesis, up to 4 nodes, internodes 1–15 mm long, 3–5 mm thick, subappressed bright reddish-brown tomentose. Stipules persistent, reddish-brown to dusky red, triangular to widely triangular, 5–8 × 5–7 mm, herbaceous, strongly keeled, abaxially densely subappressed bright reddish-brown tomentose, margin entire, apex aristate, arista ca. 2.5 mm long; stipules of erect stem narrowly triangular to ovate, 4–6 × 2.5–5 mm, abaxially sparsely bright reddish-brown tomentose, margin denticulate, ciliate. Leaves alternate, petiole terete, red, 13−22 cm long, 3.5−6 mm diameter, densely subappressed bright reddish-brown tomentose or woolly; leaf blade asymmetric, oblique, ovate, elliptic to obovate, 11−19 × 6.5–12.6 cm, broad side 4–7.7 cm wide, basal lobes cordate, 1.5–4 cm long, apex acuminate to caudate, margin slightly reflexed and subentire with a line of reddish-brown tomentose or sericeous; leaf chartaceous, succulent, adaxially green, glabrous or very sparsely brownish-yellow appressed sericeous, glabrescent, abaxially pale green, veins brownish-red, glabrous except on veins; venation basally ca. 7 palmate, midrib distinct, ca. 3 secondary veins on each side, other primary veins branching dichotomously or nearly so, tertiary veins reticulate, densely appressed reddish-brown sericeous. Inflorescences terminal, bisexual, cymose arising directly from a short erect stem, up to 3 orders of branching; peduncle red, 6.5–11 cm long, sparsely yellowish-brown sericeous or tomentose. Bracts caducous, yellowish-red to pink tinged crimson, at basal node of inflorescence narrowly ovate, ca. 7 × 3.5 mm, abaxially brown sericeous or tomentose, margin ciliate or with a line of pilose. Staminate flower: pedicel pink, 15–25 mm long, sparsely pink tomentose, tepals 4, pinkish-white to rosy pink, outer 2 widely ovate to narrowly ovate, 15–25 × 13–17 mm, abaxially and margin sparsely tomentose, margin entire, apex obtuse to rounded; inner 2 oblanceolate to obovate, 13–16 × 4–10 mm, glabrous, apex obtuse to roumded; androecium zygomorphic, ca. 5 mm across; stamens golden yellow, 28–43; filaments ca. 1.5 mm long, fused at base; anthers obovate, ca. 1 mm long, 2-locular, apex rounded. Pistillate flower: pedicel pinkish-yellow to red, ca. 10 mm long, very sparsely tomentose, tepals 5, rosy pink, outer 2 widely obvate to elliptic, 13–17 × 8–10 mm, abaxially glabrous or with very sparsely tomentose, margin entire, apex rounded, inner 3 obvate, 12–14 × 5–8 mm, glabrous, apex obtuse to rounded; ovary trigonous-globose, ca. 7 mm long, 7 mm thick (wings excluded), rosy pink to yellowish-red, subglabrous; 3-winged, wings unequal, pink to red, subglabrous, margin entire; lateral wings narrower, very narrowly crescent-shaped, ca. 3 mm wide, abaxial wing narrowly crescent-shaped, ca. 5 mm wide; ovary 3-locular, placenta bilamellate; styles 3, shortly fused at base, orange to golden yellow, U-shaped, ca. 3.5 mm long, stigma spirally twisted. Capsule not seen.</p><p>Distribution and ecology:— Begonia dieuanhiae is endemic to Xuan Nha Nature Reserve, Moc Chau District, Son La province. On damp mossy vertical cliff faces, in shady broad-leaved evergreen forests, elevation 750–1,000 m.</p><p>Etymology:— The species’ epithet is in honour of the first author’s first daughter, Ms. Dieu Anh Hoang, who always supports the first author’s researches.</p><p>Conservation status:— The known locations of B. dieuanhiae are within the Xuan Nha Nature Reserve. There were only eight populations found at the site of collection with the number of mature individuals being less than 200. However, the forest reserve appears to have remained reasonably intact, we consider an IUCN category of Least Concern as long as the species’ distributions remain intact from disturbance.</p><p>Notes: In its ovate green foliage, 4-tepaled staminate flowers with zygomorphic androecium and 3-locular ovary, the new species mostly resembles B. phouchomvoyensis . However, B. dieuanhiae is distinct from B. phouchomvoyensis in its erect stem seen only at anthesis (vs. lacking erect stem), the petiole densely covered with subappressed bright reddish-brown tomentose or woolly (vs. red villous), pistillate flowers with 5 tepals (vs. 3-tepaled), ovary wings narrowly crescent-shaped (vs. triangular), and rounded distally (vs. tip pointed). A comparison of B. dieuanhiae and B. phouchomvoyensis is presented in Table 2.</p></div>	https://treatment.plazi.org/id/625287B9FF91A11BDAC56EF52F6BC816	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.		Plazi	HOANG, THANH SON;LIN, CHE-WEI	HOANG, THANH SON, LIN, CHE-WEI (2022): Two new species, Begonia minhaniae and B. dieuanhiae (sect. Platycentrum, Begoniaceae), from northwestern Vietnam. Phytotaxa 572 (1): 87-96, DOI: 10.11646/phytotaxa.572.1.6, URL: http://dx.doi.org/10.11646/phytotaxa.572.1.6
