<documentid="3A79D9F5272454471ED7D164246DA76F"ID-DOI="10.11646/phytotaxa.645.1.8"ID-ISSN="1179-3163"ID-Zenodo-Dep="13214900"IM.bibliography_approvedBy="felipe"IM.illustrations_approvedBy="jonas"IM.materialsCitations_approvedBy="jonas"IM.tables_approvedBy="jonas"IM.taxonomicNames_approvedBy="felipe"IM.treatments_approvedBy="jonas"checkinTime="1722596870361"checkinUser="felipe"docAuthor="Nguyen, Cuong Huu, Le, Anh Tuan, Ha, Van Bac & Lin, Che Wei"docDate="2024"docId="03A7873CFFE34532FF72236BFF681545"docLanguage="en"docName="phytotaxa.645.1.8.pdf"docOrigin="Phytotaxa 645 (1)"docSource="http://dx.doi.org/10.11646/phytotaxa.645.1.8"docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article"docStyleId="96748F8F1B6C902996E134952A3A36B9"docStyleName="Phytotaxa.2014-.journal_article"docStyleVersion="13"docTitle="Begonia dakrongensis C. H. Nguyen, T. A. Le & C. W. Lin, sp. nov."docType="treatment"docVersion="1"lastPageNumber="86"masterDocId="FF9EFF44FFE24533FFFA225FFF8A121F"masterDocTitle="Begonia dakrongensis (Begoniaceae), a new species from Dakrong Nature Reserve, Quang Tri province in Central Vietnam"masterLastPageNumber="90"masterPageNumber="85"pageNumber="86"updateTime="1724788287754"updateUser="jonas"zenodo-license-figures="UNSPECIFIED"zenodo-license-treatments="UNSPECIFIED">
<mods:titleid="0617CE739930F284F4EFE174EC12110C">Begonia dakrongensis (Begoniaceae), a new species from Dakrong Nature Reserve, Quang Tri province in Central Vietnam</mods:title>
<mods:affiliationid="702B480DED94399FBB3EFB5D3F202103">Vietnam National University of Forestry, 21 A Street, Xuan Mai, Chuong My, Hanoi, Vietnam</mods:affiliation>
<mods:affiliationid="503BEC1140B61E88852BA53C43181E9C">Mien Trung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 321 Huynh Thuc Khang street, Thua Thien Hue, Vietnam</mods:affiliation>
<mods:affiliationid="ED6592BBFDB70EC3C476F3A6EE379B06">Herbarium of Taiwan Forestry Research Institute, Taiwan Forestry Research Institute, No. 53, Nan-Hai Road, Taipei 100, Taiwan</mods:affiliation>
<taxonomicNameid="4C0E4DA9FFE34532FF72236BFC8B1351"ID-CoL="CFGSN"authority="C.H.Nguyen, T.A.Le & C.W.Lin"authorityName="C. H. Nguyen, T. A. Le & C. W. Lin"box="[136,769,308,335]"class="Magnoliopsida"family="Begoniaceae"genus="Begonia"kingdom="Plantae"order="Cucurbitales"pageId="1"pageNumber="86"phylum="Tracheophyta"rank="species"species="dakrongensis"status="sp. nov.">
<figureCitationid="13352AAFFFE34532FC95236BFC361351"box="[879,956,308,334]"captionStart="FIGURE 1"captionStartId="2.[136,234,1990,2012]"captionTargetBox="[200,1416,200,1948]"captionTargetId="figure-19@2.[163,1423,187,1968]"captionTargetPageId="2"captionText="FIGURE 1. Begonia dakrongensis C.H.Nguyen, T.A.Le & C.W.Lin. A. Habit; B, B'. Portion of leaf, upper and lower surfaces; C. Stipule; D, D', D'', D'''. Bracts; E, E'. Staminate flower, face and side views; F, F'. Stamens, ventral and dorsal views; G, G'. Immature pistillate flower, face and side views; H, H'. Style and stigmatic band, ventral and dorsal views; I. Cross section of ovary; J. Capsule."figureDoi="http://doi.org/10.5281/zenodo.13214902"httpUri="https://zenodo.org/record/13214902/files/figure.png"pageId="1"pageNumber="86">Figs. 1</figureCitation>
<figureCitationid="13352AAFFFE34532FC1A236BFC651351"box="[992,1007,308,334]"captionStart="FIGURE 2"captionStartId="3.[136,234,1935,1957]"captionTargetBox="[151,1435,190,1911]"captionTargetId="figure-19@3.[151,1435,190,1911]"captionTargetPageId="3"captionText="FIGURE 2. Begonia dakrongensis C.H.Nguyen, T.A.Le & C.W.Lin.A. Habit and habitat; B. Habitats; C. Inflorescence, showing bracts, immature staminate flowers and capsule; D. Portion of leaf, upper surface, E. same, lower surface; F. Staminate flowers; G. Immature staminate flower; H. Staminate flower, face view; I. Immature pistillate flower; J. Cross section of ovary; K. Capsule."figureDoi="http://doi.org/10.5281/zenodo.13214904"httpUri="https://zenodo.org/record/13214904/files/figure.png"pageId="1"pageNumber="86">2</figureCitation>
<materialsCitationid="3B663C77FFE34532FF2023DFFEBA101D"collectingDate="2023-05-26"collectionCode="VNMN"collectorName="Tuan Anh Le & Ha Van Bac"country="Vietnam"county="Dakrong district"elevation="800"latitude="16.463028"location="Dakrong Nature Reserve"longLatPrecision="1"longitude="107.09234"municipality="Huc Nghi"pageId="1"pageNumber="86"specimenCode="B0000608"specimenCount="1"stateProvince="Quang Tri province"typeStatus="holotype">
<collectingRegionid="49CAF8C8FFE34532FEAC23DFFD9C1389"box="[342,534,384,406]"country="Vietnam"name="Quang Tri"pageId="1"pageNumber="86">Quang Tri province</collectingRegion>
, common in the moist shady areas under evergreen primary evergreen forest on the rocky crevices in association with of waterfall Do Quyen at elevations of about
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across, grooved above, sparsely to densely villous-hirsute, leaf blade asymmetric, not oblique or nearly so, obtriangular-spathulate to oblong-obovate or widely obovate, 4.7–17 ×
wide, margin denticulate on the upper two-thirds and subentire to repand on the lower one-third, slightly revolute and undulate with rows of sparsely white villous and red scabrous, sometimes with coarsely dentate and irregularly angular, apex acuminate to acute; leaf subcoriaceous, succulent, adaxially emerald green, glabrous, waxy, abaxially pale green, veins pink to red, sparsely pinkish-white villous-hirsute and red scabrous; venation palmate-pinnate, midrib distinct, 2 or 3 secondary veins on broad side and 0 or 1 on narrow side, lateral through connection between with other basal veins, minor veins inconspicuous.
long, rose pink to red, erect, glabrous or subglabrous; Bracts creamy pink to creamy white or greenish-white, hyaline, persistent, ovate-triangular to widely triangular or narrowly triangular, the first pair up to 7 ×
long, margin denticulate; Pistillate flower produced from a very short peduncle at the basal node of the inflorescence, usually solitary; staminate flowers produced in distal inflorescence part, in several 1–3-flowered compressed monochasial partial inflorescences borne on lateral branches (
usually grows in moist shady places near waterfalls, along streams and occasionally on the rocky crevices covered by evergreen broad-leaved forests at elevations of about
locality its conservation status is assessed as Data Deficient (
<collectionCodeid="ED1FAEEFFFE34532FBDF24EFFBD814D5"box="[1061,1106,1712,1738]"country="India"lsid="urn:lsid:biocol.org:col:13033"name="Forest Research Institute, Indian Council of Forestry Research and Education"pageId="1"pageNumber="86"type="Herbarium">DD</collectionCode>
<bibRefCitationid="EF9F4BDBFFE34532FEA624A7FDEB150D"author="Gagnepain, M. F."box="[348,609,1784,1810]"pageId="1"pageNumber="86"pagination="194 - 201"refId="ref2390"refString="Gagnepain, M. F. (1919) Nouveaux Begonia d'Asie. Quelques synonymes. Bulletin du Museum National d'Histoire Naturelle 25: 194 - 201."type="journal article"year="1919">Gagnepain (1919: 198)</bibRefCitation>
in their axillary and terminal inflorescence with densely bracts and flower structure, but these three species differ in many morphological characteristics. A detailed comparison is provided in
<tableCitationid="C68C0391FFE34532FF72251FFF561545"box="[136,220,1856,1882]"captionStart="TABLE 1"captionStartId="4.[136,224,159,183]"captionTargetBox="[144,1439,240,1156]"captionTargetPageId="4"captionText="TABLE 1. Comparison of Begonia dakrongensis C.H.Nguyen, T.A.Le & C.W.Lin, B. abbrevata C.I Peng and B. eberhardtii Gagnepain."pageId="1"pageNumber="86">Table 1</tableCitation>
