429 lines
33 KiB
XML
429 lines
33 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.161.55781" ID-GBIF-Dataset="fda7e50c-cdd7-44d8-8df4-2b8c7bad4772" ID-PMC="PMC7547048" ID-Pensoft-Pub="1314-2003-161-99" ID-Pensoft-UUID="5CBD4524A2E05DA89A78B2E2F8FF8A7D" ID-PubMed="33100836" ModsDocID="1314-2003-161-99" checkinTime="1601697939414" checkinUser="pensoft" docAuthor="Chung, Richard Cheng Kong & Soepadmo, Engkik" docDate="2020" docId="6BD2214B97775B239F8DDDCC16244251" docLanguage="en" docName="PhytoKeys 161: 99-106" docOrigin="PhytoKeys 161" docSource="http://dx.doi.org/10.3897/phytokeys.161.55781" docTitle="Diplodiscus latifii R. C. K. Chung 2020, sp. nov." docType="treatment" docVersion="4" id="5CBD4524A2E05DA89A78B2E2F8FF8A7D" lastPageNumber="99" masterDocId="5CBD4524A2E05DA89A78B2E2F8FF8A7D" masterDocTitle="Diplodiscus latifii (Malvaceae - Brownlowioideae), a new species from Sabah, Malaysia" masterLastPageNumber="106" masterPageNumber="99" pageNumber="99" updateTime="1668140058017" 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>Diplodiscus latifii (Malvaceae - Brownlowioideae), a new species from Sabah, Malaysia</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>Chung, Richard Cheng Kong</mods:namePart>
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<mods:affiliation>Forest Research Institute Malaysia, 52109 Kepong, Selangor, Malaysia</mods:affiliation>
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<mods:nameIdentifier type="orcid">https://orcid.org/0000-0002-2438-6126</mods:nameIdentifier>
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<mods:nameIdentifier type="email">richard@frim.gov.my</mods:nameIdentifier>
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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>Soepadmo, Engkik</mods:namePart>
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<mods:affiliation>Forest Research Institute Malaysia, 52109 Kepong, Selangor, Malaysia</mods:affiliation>
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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>161</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>99</mods:start>
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<mods:end>106</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.161.55781</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.161.55781</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1314-2003-161-99</mods:identifier>
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<mods:identifier type="Pensoft-UUID">5CBD4524A2E05DA89A78B2E2F8FF8A7D</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="168219637" LSID="urn:lsid:plazi:treatment:6BD2214B97775B239F8DDDCC16244251" httpUri="http://treatment.plazi.org/id/6BD2214B97775B239F8DDDCC16244251" lastPageNumber="99" pageId="0" pageNumber="99">
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<subSubSection pageId="0" pageNumber="99" type="nomenclature">
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<paragraph pageId="0" pageNumber="99">
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<taxonomicName LSID="6BD2214B-9777-5B23-9F8D-DDCC16244251" authority="R. C. K. Chung" authorityName="R. C. K. Chung" authorityYear="2020" class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus latifii" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="species" species="latifii" status="sp. nov.">Diplodiscus latifii R.C.K.Chung</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="99">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Diplodiscus latifii A fruiting leafy twigs B leaf lower surface densely covered in dentate-lepidote scales with scattered subentire-lepidote scales C inflorescence D mature flower bud E longitudinal-section of flower F opened flower with parts of the calyx and two petals removed G flower with the calyx, petals and stamens removed H flower showing androgynophore and pistil I petals, abaxial view (right) and adaxial view (left) J stamens, lateral view (right) and slightly to top view (left) K staminodes, abaxial view (right) and adaxial view (left) L fruit with ridges and stellate trichomes M longitudinal-section of fruit N cross-section of fruit with one developed and four aborted seeds O cross-section at the centre of ovary P stellate trichome on the ovary surface. All drawn from the type. Drawn by Joseph Pao." figureDoi="10.3897/phytokeys.161.55781.figure1" httpUri="https://binary.pensoft.net/fig/456779" pageId="0" pageNumber="99">Figures 1</figureCitation>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Diplodiscus latifii (A-C) and D. longifolius (D-F) A lower surface of leaves with scattered prominent black dots and densely small pale brown scales observed under low magnification B lower surface of leaves densely covered by brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales C petiole densely covered by brown dentate-lepidote scales D lower surface of leaves densely covered by light brown stellate-lepidote scales observed under low magnification E leaves densely covered by light brown stellate-lepidote scales F petiole densely covered by light brown stellate-lepidote scales." figureDoi="10.3897/phytokeys.161.55781.figure2" httpUri="https://binary.pensoft.net/fig/456780" pageId="0" pageNumber="99">, 2A-C</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="diagnosis">
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<paragraph pageId="0" pageNumber="99">Diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="99">
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<taxonomicName authorityName="R. C. K. Chung" authorityYear="2020" class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus latifii" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="species" species="latifii">
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<emphasis italics="true" pageId="0" pageNumber="99">Diplodiscus latifii</emphasis>
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</taxonomicName>
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is closely related to
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<taxonomicName lsidName="D. longifolius" pageId="0" pageNumber="99" rank="species" species="longifolius">
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<emphasis italics="true" pageId="0" pageNumber="99">D. longifolius</emphasis>
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</taxonomicName>
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in leaf margin, midrib, inflorescence position, flower number, calyx shape, androgynophore length and shape and fruit indumentum. However, the former differs from the latter by its dark brown to black twigs (vs. grey to light brown), elliptic to broadly elliptic leaves (vs. narrowly elliptic or obovate), densely covered in brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales below (vs. densely covered in light brown stellate-lepidote scales), coriaceous leaf texture (vs. chartaceous), acute apex (vs. acuminate), densely dentate-lepidote scaled petioles (vs. densely light brown stellate-lepidote scaled or glabrescent), ellipsoid flower buds, 3.5-4 mm in diameter (vs. spheroid, 2-3 mm in diameter), ca. 2.5 mm width of petals (vs. ca. 4.5 mm width), ellipsoid ovary (vs. oblate) and ellipsoid fruits to 7 mm in diameter (vs. broadly ellipsoid and more than 10 mm in diameter). The main morphological differences between these two species are shown in Table
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<tableCitation captionStart="Table 1" captionStartId="T1" captionText="Table 1. Comparison of diagnostic characters between Diplodiscus latifii and D. longifolius." httpUri="http://table.plazi.org/id/96322AE3F06B84BE6728E984051AA8AE" pageId="0" pageNumber="99" tableUuid="96322AE3F06B84BE6728E984051AA8AE">1</tableCitation>
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.
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</paragraph>
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<caption doi="10.3897/phytokeys.161.55781.figure1" httpUri="https://binary.pensoft.net/fig/456779" pageId="0" pageNumber="99" start="Figure 1" startId="F1">
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<paragraph pageId="0" pageNumber="99">
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<emphasis bold="true" pageId="0" pageNumber="99">Figure 1.</emphasis>
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<taxonomicName authorityName="R. C. K. Chung" authorityYear="2020" class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus latifii" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="species" species="latifii">
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<emphasis italics="true" pageId="0" pageNumber="99">Diplodiscus latifii</emphasis>
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</taxonomicName>
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<emphasis bold="true" pageId="0" pageNumber="99">A</emphasis>
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fruiting leafy twigs
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<emphasis bold="true" pageId="0" pageNumber="99">B</emphasis>
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leaf lower surface densely covered in dentate-lepidote scales with scattered subentire-lepidote scales
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<emphasis bold="true" pageId="0" pageNumber="99">C</emphasis>
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inflorescence
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<emphasis bold="true" pageId="0" pageNumber="99">D</emphasis>
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mature flower bud
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<emphasis bold="true" pageId="0" pageNumber="99">E</emphasis>
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longitudinal-section of flower
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<emphasis bold="true" pageId="0" pageNumber="99">F</emphasis>
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opened flower with parts of the calyx and two petals removed
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<emphasis bold="true" pageId="0" pageNumber="99">G</emphasis>
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flower with the calyx, petals and stamens removed
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<emphasis bold="true" pageId="0" pageNumber="99">H</emphasis>
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flower showing androgynophore and pistil
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<emphasis bold="true" pageId="0" pageNumber="99">I</emphasis>
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petals, abaxial view (right) and adaxial view (left)
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<emphasis bold="true" pageId="0" pageNumber="99">J</emphasis>
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stamens, lateral view (right) and slightly to top view (left)
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<emphasis bold="true" pageId="0" pageNumber="99">K</emphasis>
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staminodes, abaxial view (right) and adaxial view (left)
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<emphasis bold="true" pageId="0" pageNumber="99">L</emphasis>
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fruit with ridges and stellate trichomes
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<emphasis bold="true" pageId="0" pageNumber="99">M</emphasis>
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longitudinal-section of fruit
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<emphasis bold="true" pageId="0" pageNumber="99">N</emphasis>
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cross-section of fruit with one developed and four aborted seeds
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<emphasis bold="true" pageId="0" pageNumber="99">O</emphasis>
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cross-section at the centre of ovary
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<emphasis bold="true" pageId="0" pageNumber="99">P</emphasis>
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stellate trichome on the ovary surface. All drawn from the type. Drawn by Joseph Pao.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="materials_examined">
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<paragraph pageId="0" pageNumber="99">Type.</paragraph>
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<paragraph pageId="0" pageNumber="99">
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Borneo, Sabah, Lahad Datu, Silam, Mile 14, 11 January 1966,
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<emphasis italics="true" pageId="0" pageNumber="99">Ahmad Talip SAN 52945</emphasis>
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(holotype: SAN!; isotypes: K (sheet 1)!, K (sheet 2)!).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="description">
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<paragraph pageId="0" pageNumber="99">Description.</paragraph>
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<paragraph pageId="0" pageNumber="99">
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Small tree ca. 10 m tall, to 9 cm in diameter.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Bark</emphasis>
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smooth, whitish; inner bark orange.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Twigs</emphasis>
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rounded, 6-10 mm in diameter, glabrous and smooth, dark brown to black when dried.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Stipules</emphasis>
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caducous.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Leaves</emphasis>
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alternate, yellow brown with scattered tiny black dots below, coriaceous, densely covered in brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales below, glabrous above; blades elliptic to broadly elliptic, (12.5-)15.5-20(-22)
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<normalizedToken originalValue="×">x</normalizedToken>
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(5.5-)8.5-10.5(-13) cm, base oblique, subcordate, margin entire, apex acute; midrib rounded, prominent below, raised above, glabrescent to glabrous below, glabrous above; lateral veins 8-10 pairs, prominent on both sides, looping near margin forming conspicuous intramarginal veins, basal pair of veins prominent on both sides, ascending to
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<normalizedToken originalValue="¼">1/4</normalizedToken>
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of the blade length; tertiary veins reticulate, prominent on both sides; petioles stout, transversally cracked, 7-14 mm long, 2-4 mm thick, densely covered in brown dentate-lepidote scales.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Inflorescences</emphasis>
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terminal and axillary, panicles of 3-4(-5)-flowered cyme-like units, 15-23 cm long, 0.3-0.5 cm wide, lax, peduncles and rachis pale yellowish-brown, rounded, densely covered in stellate- and dentate-lepidote scales; bracts and bracteoles caducous, rarely persistent.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Flowers</emphasis>
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bisexual, actinomorphic, pedicellate; buds ellipsoid or rarely spheroid, 4-5
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<normalizedToken originalValue="×">x</normalizedToken>
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3.5-4 mm, densely covered in stellate- and dentate-lepidote scales; pedicels 2-4(-5)
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<normalizedToken originalValue="×">x</normalizedToken>
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1-2 mm, densely covered in stellate- and dentate-lepidote scales. Calyx bell-shaped, pale yellowish-brown; ca. 6 mm long; lobes 5, triangular, valvate, erect, 2-3 mm long, apex acute, densely covered in stellate- and dentate-lepidote scales abaxially, glabrous adaxially. Petals 5, white, spathulate, ca. 9
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<normalizedToken originalValue="×">x</normalizedToken>
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2.5 mm, base gradually tapering, apex emarginate, glabrous on both sides. Androgynophore short, cylindrical, ca. 1 mm long, glabrous. Staminodes 5, lanceolate, ca. 4
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<normalizedToken originalValue="×">x</normalizedToken>
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0.8 mm, shorter than filaments of fertile stamens, glabrous. Fertile stamens numerous; filaments arranged in 5 obscure phalanges, slightly connate at base, ca. 5 mm long, glabrous; anthers 0.6-0.8 mm in diameter. Ovary ellipsoid, ribbed, ca. 4
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<normalizedToken originalValue="×">x</normalizedToken>
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2.5 mm, densely stellate hairy, carpels 5, united, each carpel with 2 ovules; style 1, ca. 4.5 mm long, glabrous; stigma punctiform.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Infructescences</emphasis>
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to 15 cm long, densely covered in stellate- and dentate-lepidote scales.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Fruits</emphasis>
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ellipsoid, ribbed, 6-10
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<normalizedToken originalValue="×">x</normalizedToken>
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4-7 mm, densely stellate hairy; stalk ca. 2 mm long, ca. 1.5 mm thick, sparsely covered in stellate- and dentate-lepidote scales; pericarp ca. 1.5 mm thick.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="99">Seed</emphasis>
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1(-2).
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</paragraph>
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<caption doi="10.3897/phytokeys.161.55781.figure2" httpUri="https://binary.pensoft.net/fig/456780" pageId="0" pageNumber="99" start="Figure 2" startId="F2">
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<paragraph pageId="0" pageNumber="99">
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<emphasis bold="true" pageId="0" pageNumber="99">Figure 2.</emphasis>
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<taxonomicName authorityName="R. C. K. Chung" authorityYear="2020" class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus latifii" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="species" species="latifii">
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<emphasis italics="true" pageId="0" pageNumber="99">Diplodiscus latifii</emphasis>
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</taxonomicName>
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(
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<emphasis bold="true" pageId="0" pageNumber="99">A-C</emphasis>
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) and
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<taxonomicName lsidName="D. longifolius" pageId="0" pageNumber="99" rank="species" species="longifolius">
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<emphasis italics="true" pageId="0" pageNumber="99">D. longifolius</emphasis>
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</taxonomicName>
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(
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<emphasis bold="true" pageId="0" pageNumber="99">D-F</emphasis>
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)
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<emphasis bold="true" pageId="0" pageNumber="99">A</emphasis>
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lower surface of leaves with scattered prominent black dots and densely small pale brown scales observed under low magnification
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<emphasis bold="true" pageId="0" pageNumber="99">B</emphasis>
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lower surface of leaves densely covered by brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales
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<emphasis bold="true" pageId="0" pageNumber="99">C</emphasis>
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petiole densely covered by brown dentate-lepidote scales
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<emphasis bold="true" pageId="0" pageNumber="99">D</emphasis>
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lower surface of leaves densely covered by light brown stellate-lepidote scales observed under low magnification
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<emphasis bold="true" pageId="0" pageNumber="99">E</emphasis>
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leaves densely covered by light brown stellate-lepidote scales
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<emphasis bold="true" pageId="0" pageNumber="99">F</emphasis>
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petiole densely covered by light brown stellate-lepidote scales.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="distribution">
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<paragraph pageId="0" pageNumber="99">Distribution.</paragraph>
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<paragraph pageId="0" pageNumber="99">This species is endemic to Sabah, known from Silam, Lahad Datu.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="ecology">
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<paragraph pageId="0" pageNumber="99">Ecology.</paragraph>
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<paragraph pageId="0" pageNumber="99">Lowland mixed dipterocarp forest, yellowish soils, near stony stream at about 180 m elevation.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="vernacular names">
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<paragraph pageId="0" pageNumber="99">Vernacular names.</paragraph>
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<paragraph pageId="0" pageNumber="99">Pinggau-pinggau, takalis.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="etymology">
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<paragraph pageId="0" pageNumber="99">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="99">This species is named after the current Director-General of the Forest Research Institute Malaysia, Datuk Dr Abd. Latif bin Mohmod, for his strong support in conservation of karst limestone hills and plant diversity in Malaysia. He is the first and only forestry scientist ever honoured with a Malaysian National Young Scientist Award in 1993, two national science awards and six Malaysia Book of Records recognition awards.</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="99" type="discussion">
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<paragraph pageId="0" pageNumber="99">Discussion.</paragraph>
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<paragraph pageId="0" pageNumber="99">
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<taxonomicName authorityName="R. C. K. Chung" authorityYear="2020" class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus latifii" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="species" species="latifii">
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<emphasis italics="true" pageId="0" pageNumber="99">Diplodiscus latifii</emphasis>
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</taxonomicName>
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is an endemic, rare tree. It is known only from one collection from Silam, Lahad Datu, Sabah. The newly-described species is morphologically most similar to
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<taxonomicName lsidName="D. longifolius" pageId="0" pageNumber="99" rank="species" species="longifolius">
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<emphasis italics="true" pageId="0" pageNumber="99">D. longifolius</emphasis>
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</taxonomicName>
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in having an entire leaf margin, rounded midrib, terminal and axillary inflorescences with 3-4(-5)-flowered cyme-like units, bell-shaped calyx, short cylindrical androgynophore and densely stellate-lepidote ribbed fruits. However,
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<taxonomicName lsidName="D. latifii" pageId="0" pageNumber="99" rank="species" species="latifii">
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<emphasis italics="true" pageId="0" pageNumber="99">D. latifii</emphasis>
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</taxonomicName>
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can be easily distinguished from
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<taxonomicName lsidName="D. longifolius" pageId="0" pageNumber="99" rank="species" species="longifolius">
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<emphasis italics="true" pageId="0" pageNumber="99">D. longifolius</emphasis>
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</taxonomicName>
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by the morphological characters in Table
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<tableCitation captionStart="Table 1" captionStartId="T1" captionText="Table 1. Comparison of diagnostic characters between Diplodiscus latifii and D. longifolius." httpUri="http://table.plazi.org/id/96322AE3F06B84BE6728E984051AA8AE" pageId="0" pageNumber="99" tableUuid="96322AE3F06B84BE6728E984051AA8AE">1</tableCitation>
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.
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</paragraph>
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<caption ID-Table-UUID="96322AE3F06B84BE6728E984051AA8AE" httpUri="http://table.plazi.org/id/96322AE3F06B84BE6728E984051AA8AE" pageId="0" pageNumber="99" start="Table 1" startId="T1">
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<paragraph pageId="0" pageNumber="99">
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<emphasis bold="true" pageId="0" pageNumber="99">Table 1.</emphasis>
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Comparison of diagnostic characters between
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<taxonomicName authorityName="R. C. K. Chung" authorityYear="2020" class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus latifii" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="species" species="latifii">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">Diplodiscus latifii</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName lsidName="D. longifolius" pageId="0" pageNumber="99" rank="species" species="longifolius">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">D. longifolius</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph pageId="0" pageNumber="99">
|
||
<table pageId="0" pageNumber="99">
|
||
<tr pageId="0" pageNumber="99">
|
||
<th colspan="1" pageId="0" pageNumber="99" rowspan="1">Character</th>
|
||
<th colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
<taxonomicName lsidName="D. latifii" pageId="0" pageNumber="99" rank="species" species="latifii">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">D. latifii</emphasis>
|
||
</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
<taxonomicName lsidName="D. longifolius" pageId="0" pageNumber="99" rank="species" species="longifolius">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">D. longifolius</emphasis>
|
||
</taxonomicName>
|
||
*
|
||
</th>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Twig colour</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Dark brown to black</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Grey to light brown</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="3" pageId="0" pageNumber="99" rowspan="1">Leaf</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Shape</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Elliptic to broadly elliptic</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Narrowly elliptic or obovate</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Texture</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Coriaceous</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Chartaceous</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Indumentum below</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
densely covered in brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales (Fig.
|
||
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Diplodiscus latifii (A-C) and D. longifolius (D-F) A lower surface of leaves with scattered prominent black dots and densely small pale brown scales observed under low magnification B lower surface of leaves densely covered by brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales C petiole densely covered by brown dentate-lepidote scales D lower surface of leaves densely covered by light brown stellate-lepidote scales observed under low magnification E leaves densely covered by light brown stellate-lepidote scales F petiole densely covered by light brown stellate-lepidote scales." figureDoi="10.3897/phytokeys.161.55781.figure2" httpUri="https://binary.pensoft.net/fig/456780" pageId="0" pageNumber="99">2A, B</figureCitation>
|
||
)
|
||
</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
densely covered in light brown stellate-lepidote scales (Fig.
|
||
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Diplodiscus latifii (A-C) and D. longifolius (D-F) A lower surface of leaves with scattered prominent black dots and densely small pale brown scales observed under low magnification B lower surface of leaves densely covered by brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales C petiole densely covered by brown dentate-lepidote scales D lower surface of leaves densely covered by light brown stellate-lepidote scales observed under low magnification E leaves densely covered by light brown stellate-lepidote scales F petiole densely covered by light brown stellate-lepidote scales." figureDoi="10.3897/phytokeys.161.55781.figure2" httpUri="https://binary.pensoft.net/fig/456780" pageId="0" pageNumber="99">2D, E</figureCitation>
|
||
)
|
||
</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Base</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Subcordate</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Cordate</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Apex</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Acute</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Acuminate</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Lateral veins</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Prominent on both surfaces</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Prominulous on both surfaces</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Tertiary veins</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Prominent on both surfaces</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Faint on both surfaces</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Petiole indumentum</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
densely brown dentate-lepidote scales (Fig.
|
||
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Diplodiscus latifii (A-C) and D. longifolius (D-F) A lower surface of leaves with scattered prominent black dots and densely small pale brown scales observed under low magnification B lower surface of leaves densely covered by brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales C petiole densely covered by brown dentate-lepidote scales D lower surface of leaves densely covered by light brown stellate-lepidote scales observed under low magnification E leaves densely covered by light brown stellate-lepidote scales F petiole densely covered by light brown stellate-lepidote scales." figureDoi="10.3897/phytokeys.161.55781.figure2" httpUri="https://binary.pensoft.net/fig/456780" pageId="0" pageNumber="99">2C</figureCitation>
|
||
)
|
||
</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
densely light brown stellate-lepidote to glabrescent (Fig.
|
||
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Diplodiscus latifii (A-C) and D. longifolius (D-F) A lower surface of leaves with scattered prominent black dots and densely small pale brown scales observed under low magnification B lower surface of leaves densely covered by brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales C petiole densely covered by brown dentate-lepidote scales D lower surface of leaves densely covered by light brown stellate-lepidote scales observed under low magnification E leaves densely covered by light brown stellate-lepidote scales F petiole densely covered by light brown stellate-lepidote scales." figureDoi="10.3897/phytokeys.161.55781.figure2" httpUri="https://binary.pensoft.net/fig/456780" pageId="0" pageNumber="99">2F</figureCitation>
|
||
)
|
||
</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="3" pageId="0" pageNumber="99" rowspan="1">Flower bud</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Shape</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Ellipsoid</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Spheroid</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Size (mm)</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
4-5
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
3.5-4
|
||
</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
2-3(-5)
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
2-3
|
||
</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Petal width (mm)</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">ca. 2.5</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">ca. 4.5</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Ovary shape</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Ellipsoid</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Oblate</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="3" pageId="0" pageNumber="99" rowspan="1">Fruit</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Shape</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Ellipsoid</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Broadly ellipsoid</td>
|
||
</tr>
|
||
<tr pageId="0" pageNumber="99">
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">Size (mm)</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
6-10
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
4-7
|
||
</td>
|
||
<td colspan="1" pageId="0" pageNumber="99" rowspan="1">
|
||
12-20
|
||
<normalizedToken originalValue="×">x</normalizedToken>
|
||
10-15
|
||
</td>
|
||
</tr>
|
||
</table>
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="99">
|
||
<tableNote pageId="0" pageNumber="99">
|
||
*Specimens examined: BORNEO. Sabah: Tawau -
|
||
<emphasis italics="true" pageId="0" pageNumber="99">A.D.E. Elmer 21312</emphasis>
|
||
(isotypes: BISH!, BO!, BM!, CAS!, CM!, HBG!, K!, L!, M!, MO!, SING!, UC!), Tanjung FR -
|
||
<emphasis italics="true" pageId="0" pageNumber="99">W.J. Pereira SAN 43717</emphasis>
|
||
(SAN!); Lahad Datu:
|
||
<emphasis italics="true" pageId="0" pageNumber="99">J. Bousi SAN 119318</emphasis>
|
||
(SAN!), Silam -
|
||
<emphasis italics="true" pageId="0" pageNumber="99">A. Agam SAN 37171</emphasis>
|
||
(K!, SAN!),
|
||
<emphasis italics="true" pageId="0" pageNumber="99">H.T. Sinanggul SAN 57445</emphasis>
|
||
(A!, SAN!),
|
||
<emphasis italics="true" pageId="0" pageNumber="99">R.P. Binideh SAN 55173</emphasis>
|
||
(K!, SAN!), Bakapit -
|
||
<emphasis italics="true" pageId="0" pageNumber="99">Heya & U. Juali SAN 61675</emphasis>
|
||
(K!, SAN!, L!), Pulau Sakar -
|
||
<emphasis italics="true" pageId="0" pageNumber="99">M. Chai SAN 26663</emphasis>
|
||
(K!, SAN!, L!),
|
||
<emphasis italics="true" pageId="0" pageNumber="99">G. Aban SAN 54818</emphasis>
|
||
(SAN!). Sarawak: Kuching -
|
||
<emphasis italics="true" pageId="0" pageNumber="99">J.D. Mamit S 32622</emphasis>
|
||
(L!, SAR!).
|
||
</tableNote>
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="99">
|
||
Morphologically,
|
||
<taxonomicName authorityName="R. C. K. Chung" authorityYear="2020" class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus latifii" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="species" species="latifii">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">Diplodiscus latifii</emphasis>
|
||
</taxonomicName>
|
||
is also closely allied to the other four species found in Malaysia (i.e.
|
||
<taxonomicName lsidName="D. hookerianus" pageId="0" pageNumber="99" rank="species" species="hookerianus">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">D. hookerianus</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName lsidName="D. microlepis" pageId="0" pageNumber="99" rank="species" species="microlepis">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">D. microlepis</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName lsidName="D. parviflorus" pageId="0" pageNumber="99" rank="species" species="parviflorus">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">D. parviflorus</emphasis>
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName lsidName="D. scortechinii" pageId="0" pageNumber="99" rank="species" species="scortechinii">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">D. scortechinii</emphasis>
|
||
</taxonomicName>
|
||
) in having asymmetrical leaf bases, entire leaf margin, short petioles, lax panicles and united carpels. Nevertheless, this new species can be distinguished from these four species by its dark brown to black twigs, densely covered in brown dentate-lepidote scales with scattered dark brown subentire-lepidote scales below its elliptic to broadly elliptic leaves, prominent lateral and tertiary veins on both surfaces, basal pair of lateral veins ascending to
|
||
<normalizedToken originalValue="¼">1/4</normalizedToken>
|
||
of the blade length, larger flower buds greater than 2 mm in diameter, ellipsoid ovary and ribbed ellipsoid fruits. With the addition of this new species, there are now six species of
|
||
<taxonomicName class="Magnoliopsida" family="Malvaceae" genus="Diplodiscus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Diplodiscus" order="Malvales" pageId="0" pageNumber="99" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="99">Diplodiscus</emphasis>
|
||
</taxonomicName>
|
||
in Malaysia and a key to these species is provided below:
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |