213 lines
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213 lines
15 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.138.46718" ID-PMC="PMC6968974" ID-Pensoft-Pub="1314-2003-138-187" ID-Pensoft-UUID="D24D4B8434835B3CA881E382FF224750" ID-PubMed="31988613" ModsDocID="1314-2003-138-187" checkinTime="1578758067558" checkinUser="pensoft" docAuthor="Ding, Hong-Bo, Maw, Mya Bhone, Yang, Bin, Bouamanivong, Somsanith & Tan, Yun-Hong" docDate="2020" docId="A2CD853AA49A5DC9AE9D8D3E85BA040D" docLanguage="en" docName="PhytoKeys 138: 187-201" docOrigin="PhytoKeys 138" docSource="http://dx.doi.org/10.3897/phytokeys.138.46718" docTitle="Begonia hypoleuca Y. H. Tan & H. B. Ding 2020, sp. nov." docType="treatment" docVersion="5" id="D24D4B8434835B3CA881E382FF224750" lastPageNumber="187" masterDocId="D24D4B8434835B3CA881E382FF224750" masterDocTitle="An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records" masterLastPageNumber="201" masterPageNumber="187" pageNumber="187" updateTime="1668139612763" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>An updated checklist of Begonia (Begoniaceae) in Laos, with two new species and five new records</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Ding, Hong-Bo</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Maw, Mya Bhone</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Yang, Bin</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Bouamanivong, Somsanith</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Tan, Yun-Hong</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>PhytoKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2020</mods:date>
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<mods:detail type="volume">
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<mods:number>138</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>187</mods:start>
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<mods:end>201</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/phytokeys.138.46718</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.138.46718</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1314-2003-138-187</mods:identifier>
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<mods:identifier type="Pensoft-UUID">D24D4B8434835B3CA881E382FF224750</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="161672067" LSID="urn:lsid:plazi:treatment:A2CD853AA49A5DC9AE9D8D3E85BA040D" httpUri="http://treatment.plazi.org/id/A2CD853AA49A5DC9AE9D8D3E85BA040D" lastPageNumber="187" pageId="0" pageNumber="187">
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<subSubSection pageId="0" pageNumber="187" type="nomenclature">
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<paragraph pageId="0" pageNumber="187">
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<taxonomicName LSID="A2CD853A-A49A-5DC9-AE9D-8D3E85BA040D" authority="Y. H. Tan & H. B. Ding" authorityName="Y. H. Tan & H. B. Ding" authorityYear="2020" class="Magnoliopsida" family="Begoniaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia hypoleuca" order="Cucurbitales" pageId="0" pageNumber="187" phylum="Tracheophyta" rank="species" species="hypoleuca" status="sp. nov.">Begonia hypoleuca Y.H.Tan & H.B.Ding</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="187">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Begonia hypoleuca Y. H. Tan & H. B. Ding, sp. nov. A habitat B flowers (front view) C flowers (lateral view) D habit E inflorescence F leaves G tepals of staminate flower (back view) H stamens with peduncle I tepals of staminate flower (front view) J mature fruit with peduncle K mature fruit L-N serial cross sections of ovary. Photographed by H. B. Ding." figureDoi="10.3897/phytokeys.138.46718.figure2" httpUri="https://binary.pensoft.net/fig/370295" pageId="0" pageNumber="187">Figure 2</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="reference_group">
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<paragraph pageId="0" pageNumber="187">
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sect.
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<taxonomicName class="Magnoliopsida" family="Begoniaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="" order="Cucurbitales" pageId="0" pageNumber="187" phylum="Tracheophyta" rank="section" section="Reichenheimia">Reichenheimia</taxonomicName>
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(Klotzsch) A. de Candolle
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="diagnosis">
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<paragraph pageId="0" pageNumber="187">Diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="187">
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The new species is mostly similar to
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<taxonomicName lsidName="B. henryi" pageId="0" pageNumber="187" rank="species" species="henryi">
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<emphasis italics="true" pageId="0" pageNumber="187">B. henryi</emphasis>
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</taxonomicName>
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<bibRefCitation DOI="https://doi.org/10.1111/j.1095-8339.1887.tb00532.x" author="Hemsley, WB" editor="Forbes, FB" journalOrPublisher="The Journal of the Linnean Society, Botany" pageId="0" pageNumber="187" pagination="321 - 323" refId="B9" refString="Hemsley, WB, 1887. Begoniaceae. In: Forbes, FB, Hemsley, WB, Eds., An enumeration of all the plants known from China proper, Formosa, Hainan, Corea, the Luchu Archipelago, and the island of Hongkong, together with their distribution and synonymy. The Journal of the Linnean Society, Botany 23: 321 - 323, DOI: https://doi.org/10.1111/j.1095-8339.1887.tb00532.x" title="Begoniaceae." url="https://doi.org/10.1111/j.1095-8339.1887.tb00532.x" volume="23" volumeTitle="An enumeration of all the plants known from China proper, Formosa, Hainan, Corea, the Luchu Archipelago, and the island of Hongkong, together with their distribution and synonymy." year="1887">Hemsley (1887</bibRefCitation>
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: 322), but differs by its glabrous leaves, petiole with linear red dots and pubescent, slightly denticulate leaf margin and fewer stamens.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="materials_examined">
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<paragraph pageId="0" pageNumber="187">Type.</paragraph>
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<paragraph pageId="0" pageNumber="187">
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Laos. Luang Namtha Province, Nam Ha National Biodiversity Conservation Area, Nam O. Village,
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<geoCoordinate degrees="20" direction="north" minutes="04" orientation="latitude" precision="1" seconds="48.16" value="20.080046">20°04'48.16"N</geoCoordinate>
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,
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<geoCoordinate degrees="101" direction="east" minutes="06" orientation="longitude" precision="1" seconds="58.46" value="101.116234">101°06'58.46"E</geoCoordinate>
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. 656 m elev., 24 October 2018,
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<emphasis italics="true" pageId="0" pageNumber="187">Y.H. Tan</emphasis>
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,
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<emphasis italics="true" pageId="0" pageNumber="187">B. Yang</emphasis>
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,
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<emphasis italics="true" pageId="0" pageNumber="187">H.B. Ding & X.D. Zeng L0792</emphasis>
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(holotype: HITBC!).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="description">
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<paragraph pageId="0" pageNumber="187">Description.</paragraph>
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<paragraph pageId="0" pageNumber="187">
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Monoecious herb, stemless, tuber small, globose with fibrous roots, 10-13 mm in diameter.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">Stipule</emphasis>
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: caducous.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">Leaf</emphasis>
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: petiole 7-10 cm long, succulent, with reddish linear dots, sparsely pubescent or subglabrous.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">Blade</emphasis>
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slightly triangular ovate or broadly ovate, 6-12
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<normalizedToken originalValue="×">x</normalizedToken>
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5-8.5 cm, base cordate, apex acuminate, margin slightly denticulate, upper surface green, lower surface paler or silver, glabrous, venation palmate-pinnate, midrib pale green, lateral veins 4-6 pairs.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">Inflorescence</emphasis>
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axillary, cymose, peduncle ca. 6 cm long, reddish, glabrous, branching 2-4 times, 2-6 male flowers, ca. 2 pistillate flowers, bracts caducous, ca. 2
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<normalizedToken originalValue="×">x</normalizedToken>
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1 mm.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">Staminate flower</emphasis>
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: pedicel 1.0-1.2 cm long, membranous, reddish at the basal part and pink, glabrous, tepals 2, pink, margin entire, glabrous on both surfaces, broadly ovate, 12
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<normalizedToken originalValue="×">x</normalizedToken>
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10 mm, apex acute, base rounded; stamens 10-15, filaments 1.5-2 mm long, anthers 1-1.5 mm, ellipsoid, yellow.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">Pistillate flower</emphasis>
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: pedicle ca. 1.8 cm long, reddish to pink, tepals unknown,
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">ovary</emphasis>
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3-locular, placentae axial, entire,
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">styles</emphasis>
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3.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="187">Capsule</emphasis>
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pale green, nodding, ellipsoid, dorsal wing enlarged, 7-10 mm long, two lateral wings, smaller, 2-3 mm long.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="phenology">
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<paragraph pageId="0" pageNumber="187">Phenology.</paragraph>
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<paragraph pageId="0" pageNumber="187">Flowering and fruiting in October-November.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="distribution">
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<paragraph pageId="0" pageNumber="187">Distribution.</paragraph>
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<paragraph pageId="0" pageNumber="187">The species is known only from the type locality, Luang Namtha Province, Nam Ha National Biodiversity Conservation Area, Laos.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="ecology">
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<paragraph pageId="0" pageNumber="187">Ecology.</paragraph>
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<paragraph pageId="0" pageNumber="187">The species was collected on shaded moist limestone rock surfaces of stone forest at 656 m elevation.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="etymology">
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<paragraph pageId="0" pageNumber="187">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="187">
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The specific epithet '
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<emphasis italics="true" pageId="0" pageNumber="187">hypoleuca</emphasis>
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' refers to the lower surface of its paler or silver leaf.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="conservation status">
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<paragraph pageId="0" pageNumber="187">Conservation status.</paragraph>
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<paragraph pageId="0" pageNumber="187">
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Data Deficient (DD).
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<taxonomicName authorityName="Y. H. Tan & H. B. Ding" authorityYear="2020" class="Magnoliopsida" family="Begoniaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia hypoleuca" order="Cucurbitales" pageId="0" pageNumber="187" phylum="Tracheophyta" rank="species" species="hypoleuca">
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<emphasis italics="true" pageId="0" pageNumber="187">Begonia hypoleuca</emphasis>
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</taxonomicName>
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has been collected on only one occasion from the type locality. However, the type locality is located in the Nam Ha National Biodiversity Conservation Area and we did not discover any strong pressure on the species. Thus, the species preliminarily has been assigned in the Data Deficient (DD) category as being appropriate according to the guidelines for using the IUCN Red List Categories and Criteria (
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<bibRefCitation author="IUCN" journalOrPublisher="Mathematische-naturwissenchaftliche Klasse" pageId="0" pageNumber="187" publicationUrl="http://www.iucnredlist.org/documents/" refId="B17" refString="IUCN, 2017. Guidelines for Using The IUCN Red List Categories and Criteria. version 13. Prepared by the Standards and Petitions Subcommittee. http://www.iucnredlist.org/documents/" title="Guidelines for Using The IUCN Red List Categories and Criteria. version 13. Prepared by the Standards and Petitions Subcommittee." url="http://www.iucnredlist.org/documents/" year="2017">IUCN 2017</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="187" type="notes">
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<paragraph pageId="0" pageNumber="187">Notes.</paragraph>
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<paragraph pageId="0" pageNumber="187">
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<taxonomicName authorityName="Y. H. Tan & H. B. Ding" authorityYear="2020" class="Magnoliopsida" family="Begoniaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia hypoleuca" order="Cucurbitales" pageId="0" pageNumber="187" phylum="Tracheophyta" rank="species" species="hypoleuca">
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<emphasis italics="true" pageId="0" pageNumber="187">Begonia hypoleuca</emphasis>
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</taxonomicName>
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is most similar in morphological characteristics to
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<taxonomicName lsidName="B. henryi" pageId="0" pageNumber="187" rank="species" species="henryi">
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<emphasis italics="true" pageId="0" pageNumber="187">B. henryi</emphasis>
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</taxonomicName>
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Hemsl. under the
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<taxonomicName lsidName="" pageId="0" pageNumber="187" rank="section" section="Reichenheimia">section Reichenheimia</taxonomicName>
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. It can, however, be distinguished by the following characteristics, including reddish linear red dots on petiole (vs. without), sparsely pubescent on petiole (vs. brown villous), slightly denticulate leaf margin (vs. crenate), glabrous leaves (vs. pubescent), leaf upper surface green (vs. green with dark green patches), lower surface pale green (vs. pale green with reddish patches), male flower tepals broadly ovate (vs. oblate-orbicular), apex acute (vs. rounded), stamens number fewer 10-15 (vs. up to 30).
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</paragraph>
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<caption doi="10.3897/phytokeys.138.46718.figure2" httpUri="https://binary.pensoft.net/fig/370295" pageId="0" pageNumber="187" start="Figure 2" startId="F2">
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<paragraph pageId="0" pageNumber="187">
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<emphasis bold="true" pageId="0" pageNumber="187">Figure 2.</emphasis>
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<taxonomicName authorityName="Y. H. Tan & H. B. Ding" authorityYear="2020" class="Magnoliopsida" family="Begoniaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia hypoleuca" order="Cucurbitales" pageId="0" pageNumber="187" phylum="Tracheophyta" rank="species" species="hypoleuca">
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<emphasis italics="true" pageId="0" pageNumber="187">Begonia hypoleuca</emphasis>
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</taxonomicName>
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Y.H.Tan & H.B.Ding, sp. nov.
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<emphasis bold="true" pageId="0" pageNumber="187">A</emphasis>
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habitat
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<emphasis bold="true" pageId="0" pageNumber="187">B</emphasis>
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flowers (front view)
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<emphasis bold="true" pageId="0" pageNumber="187">C</emphasis>
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flowers (lateral view)
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<emphasis bold="true" pageId="0" pageNumber="187">D</emphasis>
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habit
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<emphasis bold="true" pageId="0" pageNumber="187">E</emphasis>
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inflorescence
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<emphasis bold="true" pageId="0" pageNumber="187">F</emphasis>
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leaves
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<emphasis bold="true" pageId="0" pageNumber="187">G</emphasis>
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tepals of staminate flower (back view)
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<emphasis bold="true" pageId="0" pageNumber="187">H</emphasis>
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stamens with peduncle
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<emphasis bold="true" pageId="0" pageNumber="187">I</emphasis>
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tepals of staminate flower (front view)
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<emphasis bold="true" pageId="0" pageNumber="187">J</emphasis>
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mature fruit with peduncle
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<emphasis bold="true" pageId="0" pageNumber="187">K</emphasis>
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mature fruit
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<emphasis bold="true" pageId="0" pageNumber="187">L-N</emphasis>
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serial cross sections of ovary. Photographed by H.B. Ding.
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</paragraph>
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</caption>
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</subSubSection>
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</treatment>
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</document> |