treatments-xml/data/F6/38/E1/F638E108BD5554EF9276057320CEAFE6.xml

<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.159.47442" ID-GBIF-Dataset="eb37936e-ad1e-4173-b380-4fc233a76f1c" ID-PMC="PMC7486308" ID-Pensoft-Pub="1314-2003-159-35" ID-Pensoft-UUID="49326936CA9C57E7BB982C446C399D51" ID-PubMed="32973387" ModsDocID="1314-2003-159-35" checkinTime="1599298945207" checkinUser="pensoft" docAuthor="Tran, Thi-Lien, Ly, Ngoc-Sam, Tran, Minh-Ngoc, Nguyen, Xuan-Truong, Cao, Ngoc-Giang &amp; Pham, Hong-Dung" docDate="2020" docId="F638E108BD5554EF9276057320CEAFE6" docLanguage="en" docName="PhytoKeys 159: 35-44" docOrigin="PhytoKeys 159" docSource="http://dx.doi.org/10.3897/phytokeys.159.47442" docTitle="Didymocarpus phuquocensis N. S. Ly, T. L. Tran &amp; N. G. Cao 2020, sp. nov." docType="treatment" docVersion="4" id="49326936CA9C57E7BB982C446C399D51" lastPageNumber="35" masterDocId="49326936CA9C57E7BB982C446C399D51" masterDocTitle="Didymocarpus phuquocensis, a new species of Gesneriaceae from Phu Quoc Island, South-western Vietnam" masterLastPageNumber="44" masterPageNumber="35" pageNumber="35" updateTime="1668140014081" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Didymocarpus phuquocensis, a new species of Gesneriaceae from Phu Quoc Island, South-western Vietnam</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Tran, Thi-Lien</mods:namePart>
<mods:affiliation>National Institute of Medicinal Materials, 3 B Quang Trung, Hoang Kiem District, Ha Noi, Vietnam</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Ly, Ngoc-Sam</mods:namePart>
<mods:affiliation>Institute of Tropical Biology, VAST, 85 Tran Quoc Toan road, District 3, Ho Chi Minh City, Vietnam &amp; Graduate University of Science and Technology, VAST, 18, Hoang Quoc Viet, Cau Giay District, Ha Noi, Vietnam Vietnam</mods:affiliation>
<mods:nameIdentifier type="orcid">https://orcid.org/0000-0002-9925-5171</mods:nameIdentifier>
<mods:nameIdentifier type="email">lysamitb@gmail.com</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Tran, Minh-Ngoc</mods:namePart>
<mods:affiliation>National Institute of Medicinal Materials, 3 B Quang Trung, Hoang Kiem District, Ha Noi, Vietnam</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Nguyen, Xuan-Truong</mods:namePart>
<mods:affiliation>National Institute of Medicinal Materials, 3 B Quang Trung, Hoang Kiem District, Ha Noi, Vietnam</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Cao, Ngoc-Giang</mods:namePart>
<mods:affiliation>National Institute of Medicinal Materials, 3 B Quang Trung, Hoang Kiem District, Ha Noi, Vietnam</mods:affiliation>
<mods:nameIdentifier type="orcid">https://orcid.org/0000-0003-1137-0173</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Pham, Hong-Dung</mods:namePart>
<mods:affiliation>Phu Quoc National Park, 1 Nguyen Chi Thanh, Duong Dong Town, Phu Quoc District, Kien Giang Province, Vietnam</mods:affiliation>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
<mods:title>PhytoKeys</mods:title>
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<mods:part>
<mods:date>2020</mods:date>
<mods:detail type="volume">
<mods:number>159</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>35</mods:start>
<mods:end>44</mods:end>
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<mods:url>http://dx.doi.org/10.3897/phytokeys.159.47442</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.159.47442</mods:identifier>
<mods:identifier type="Pensoft-Pub">1314-2003-159-35</mods:identifier>
<mods:identifier type="Pensoft-UUID">49326936CA9C57E7BB982C446C399D51</mods:identifier>
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<treatment ID-GBIF-Taxon="167514815" LSID="urn:lsid:plazi:treatment:F638E108BD5554EF9276057320CEAFE6" httpUri="http://treatment.plazi.org/id/F638E108BD5554EF9276057320CEAFE6" lastPageNumber="35" pageId="0" pageNumber="35">
<subSubSection pageId="0" pageNumber="35" type="nomenclature">
<paragraph pageId="0" pageNumber="35">
<taxonomicName LSID="F638E108-BD55-54EF-9276-057320CEAFE6" authority="N. S. Lý, T. L. Tran &amp; N. G. Cao" authorityName="N. S. Ly, T. L. Tran &amp; N. G. Cao" authorityYear="2020" class="Magnoliopsida" family="Gesneriaceae" genus="Didymocarpus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Didymocarpus phuquocensis" order="Lamiales" pageId="0" pageNumber="35" phylum="Tracheophyta" rank="species" species="phuquocensis" status="sp. nov.">
Didymocarpus phuquocensis N.S. 
<normalizedToken originalValue="Lý">Ly</normalizedToken>
, T.L.Tran &amp; N.G.Cao
</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="35">sp. nov.</taxonomicNameLabel>
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Didymocarpus phuquocensis A flowering plants in natural habit B flowering plants showing 3 - verticillate leaves (red arrow) C mature plant with dried fruit and new stems D flower (top view) E flower (side view) F flower (front view) G inflorescence with peduncle, bract and calyx H calyx (top view) I longitudinal section of calyx showing disc J longitudinal section of corolla showing anterior (lower) lip with fertile stamens K longitudinal section of corolla showing posterior (upper) lips and staminodes (red arrow) L close-up of fertile stamens M ovary and calyx N dried fruits. The coloured plate prepared by Ng ọc-Sam Ly." figureDoi="10.3897/phytokeys.159.47442.figure1" httpUri="https://binary.pensoft.net/fig/449281" pageId="0" pageNumber="35">Figures 1</figureCitation>
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Distribution map of Didymocarpus phuquocensis in Phu Quoc National Park, Phu Quoc Island, Kien Giang Province." figureDoi="10.3897/phytokeys.159.47442.figure2" httpUri="https://binary.pensoft.net/fig/449282" pageId="0" pageNumber="35">, 2</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="diagnosis">
<paragraph pageId="0" pageNumber="35">Diagnosis.</paragraph>
<paragraph pageId="0" pageNumber="35">
<taxonomicName authorityName="N. S. Ly, T. L. Tran &amp; N. G. Cao" authorityYear="2020" class="Magnoliopsida" family="Gesneriaceae" genus="Didymocarpus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Didymocarpus phuquocensis" order="Lamiales" pageId="0" pageNumber="35" phylum="Tracheophyta" rank="species" species="phuquocensis">
<emphasis italics="true" pageId="0" pageNumber="35">Didymocarpus phuquocensis</emphasis>
</taxonomicName>
is most similar morphologically to 
<emphasis italics="true" pageId="0" pageNumber="35">
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">D. pulcher</taxonomicName>
, 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">D. hookeri</taxonomicName>
</emphasis>
and 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
in the 3-verticilate, petiolate leaves, the morphologically-similar calyx, corolla, stamens, pistil and fruit, but differs from all in the glandular-pubescent stems and petioles (vs. puberulous, villous, pubescent and eglandular of the latter three, respectively), glandular-pubescent leaf blades (vs. pubescent, somewhat villous, puberulous and eglandular, respectively), 1(-2)-flowered cymes (vs. many-flowered cymes of the latter three), longer corolla 4.8-5.3 cm long (vs. 2.5-3 cm in 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
, ca. 1.4 cm in 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
and ca. 2.2 cm in 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
), longer and densely multicellular glandular-puberulent ovary ca. 3 cm long (vs. 1.1-1.8 cm and glabrous in 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
, 1.1-1.7 cm and pubescent in 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
and 0.7-1.3 cm and glabrous in 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
) and longer fruits 4.4-5.5 cm long (vs. ca. 4 cm long in 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
, 1.3-3.5 cm long of 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
and ca. 4 cm long in 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
).
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="materials_examined">
<paragraph pageId="0" pageNumber="35">Type.</paragraph>
<paragraph pageId="0" pageNumber="35">
Vietnam. Kien Giang Province: Phu Quoc District, Phu Quoc NP, Suoi Mo, 18 September 2018, 
<geoCoordinate degrees="10" direction="north" minutes="14" orientation="latitude" precision="1" seconds="40.90" value="10.244695">10°14'40.90&quot;N</geoCoordinate>
, 
<geoCoordinate degrees="104" direction="east" minutes="2" orientation="longitude" precision="1" seconds="14.15" value="104.03726">104°2'14.15&quot;E</geoCoordinate>
, 82 m elev., 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Lý">Ly</normalizedToken>
Ngọc 
<normalizedToken originalValue="Sâm">Sam</normalizedToken>
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">Cao Ngọc Giang</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
Nguyễn Thị 
<normalizedToken originalValue="Liên">Lien</normalizedToken>
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Ngô">Ngo</normalizedToken>
Minh Huyền
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Hùng">Hung</normalizedToken>
, 
<normalizedToken originalValue="Hà">Ha</normalizedToken>
<normalizedToken originalValue="Văn">Văn</normalizedToken>
Long
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">TNB-305</emphasis>
(Holotype: VNM, isotype: P, NIMM).
</paragraph>
<caption doi="10.3897/phytokeys.159.47442.figure1" httpUri="https://binary.pensoft.net/fig/449281" pageId="0" pageNumber="35" start="Figure 1" startId="F1">
<paragraph pageId="0" pageNumber="35">
<emphasis bold="true" pageId="0" pageNumber="35">Figure 1.</emphasis>
<taxonomicName authorityName="N. S. Ly, T. L. Tran &amp; N. G. Cao" authorityYear="2020" class="Magnoliopsida" family="Gesneriaceae" genus="Didymocarpus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Didymocarpus phuquocensis" order="Lamiales" pageId="0" pageNumber="35" phylum="Tracheophyta" rank="species" species="phuquocensis">
<emphasis italics="true" pageId="0" pageNumber="35">Didymocarpus phuquocensis</emphasis>
</taxonomicName>
<emphasis bold="true" pageId="0" pageNumber="35">A</emphasis>
flowering plants in natural habit 
<emphasis bold="true" pageId="0" pageNumber="35">B</emphasis>
flowering plants showing 3-verticillate leaves (red arrow) 
<emphasis bold="true" pageId="0" pageNumber="35">C</emphasis>
mature plant with dried fruit and new stems 
<emphasis bold="true" pageId="0" pageNumber="35">D</emphasis>
flower (top view) 
<emphasis bold="true" pageId="0" pageNumber="35">E</emphasis>
flower (side view) 
<emphasis bold="true" pageId="0" pageNumber="35">F</emphasis>
flower (front view) 
<emphasis bold="true" pageId="0" pageNumber="35">G</emphasis>
inflorescence with peduncle, bract and calyx 
<emphasis bold="true" pageId="0" pageNumber="35">H</emphasis>
calyx (top view) 
<emphasis bold="true" pageId="0" pageNumber="35">I</emphasis>
longitudinal section of calyx showing disc 
<emphasis bold="true" pageId="0" pageNumber="35">J</emphasis>
longitudinal section of corolla showing anterior (lower) lip with fertile stamens 
<emphasis bold="true" pageId="0" pageNumber="35">K</emphasis>
longitudinal section of corolla showing posterior (upper) lips and staminodes (red arrow) 
<emphasis bold="true" pageId="0" pageNumber="35">L</emphasis>
close-up of fertile stamens 
<emphasis bold="true" pageId="0" pageNumber="35">M</emphasis>
ovary and calyx 
<emphasis bold="true" pageId="0" pageNumber="35">N</emphasis>
dried fruits. The coloured plate prepared by Ng 
<normalizedToken originalValue="ọc-Sâm">ọc-Sam</normalizedToken>
<normalizedToken originalValue="Lý">Ly</normalizedToken>
.
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="description">
<paragraph pageId="0" pageNumber="35">Description.</paragraph>
<paragraph pageId="0" pageNumber="35">
Deciduous, perennial, epilithic herb, (8-)10-19 cm tall, stems 2.5-3.5 mm in diameter. 
<emphasis bold="true" italics="true" pageId="0" pageNumber="35">Dry season</emphasis>
: new vegetative buds produced from the rhizome which then develops during the rainy season. 
<emphasis bold="true" italics="true" pageId="0" pageNumber="35">Rainy season</emphasis>
: stem erect, (3-)4 nodes, pale greenish, densely white multicellular glandular-pubescent; the longest node separated from the base of stem 5.7-12.2 cm long, the medium nodes at the middle stem 1.5-4.5 cm long, the shortest nodes very shortly distanced (0.2-0.5 cm long) at the apex. 
<emphasis bold="true" pageId="0" pageNumber="35">Leaves</emphasis>
3- verticillate, petiolate in the 2nd and 3rd whorls, other whorls with smaller and sessile or subsessile leaves; blades coriaceous, adaxially light greenish, abaxially whitish-green, asymmetrically narrowly elliptic to elliptic-ovate, the largest ones 7.2-10 
<normalizedToken originalValue="×">x</normalizedToken>
2.4-3.7, the smaller ones 1-4.6 
<normalizedToken originalValue="×">x</normalizedToken>
0.5-2.1 cm, adaxially densely white multicellular glandular-pubescent, abaxially sparsely white multicellular glandular-pubescent, apex attenuate to acute, base lightly oblique, attenuate to cuneate, margin serrate; venation pinnate, with 5-6 of ascending secondary veins on each side of midrib, somewhat opposite, adaxially obscure, abaxially prominent, densely covered with indumentum as the stem; petioles terete, unequal in length, 0.5-3.2 cm long [the longest ones 3-3.2 cm, the shortest ones 0.5-1 cm], 2-2.5 mm in diam., whitish-green, sometimes tinted greenish-purple above, with indumentum as the stem. 
<emphasis bold="true" pageId="0" pageNumber="35">Inflorescences</emphasis>
terminal or subterminal, cyme 1(-2) flowered, pendent; 
<emphasis bold="true" pageId="0" pageNumber="35">peduncle</emphasis>
slender, (1.3-)3.1-4.5 cm long, ca. 0.5 mm in diam., tinted reddish-green, covered with white multicellular glandular and glandular-pubescent; 
<emphasis bold="true" pageId="0" pageNumber="35">pedicels</emphasis>
5-11 mm long, ca. 0.7 mm in diam., pale green, with indumentum as the peduncle, but more sparse; 
<emphasis bold="true" pageId="0" pageNumber="35">bracts</emphasis>
paired; lanceolate to oblong-lanceolate, 4-5 
<normalizedToken originalValue="×">x</normalizedToken>
1-1.5 mm, apex round to acute, margin entire, green, adaxially sparsely multicellular glandular-pubescent, abaxially densely white multicellular glandular-pubescent. 
<emphasis bold="true" pageId="0" pageNumber="35">Calyx</emphasis>
campanulate, 5-6.5 mm long, dull reddish, outside sparsely multicellular glandular-puberulent; tube 3-4 mm long, 2-2.5 mm in diam.; lobes triangular, (sub)equal, 5-lobed, symmetrical, 2-2.5 mm long, ca. 1.5-1.8 mm wide at base, apices acute. 
<emphasis bold="true" pageId="0" pageNumber="35">Corolla</emphasis>
funnelform, 4.8-5.3 cm long, glabrous, light purple, paler at base; tube 3.8-4.1 cm long, base narrow, 2-3 mm in diameter, widening abruptly at 1.9-2.1 cm from the base, widest at throat, 1-1.1 cm in diam.; lobes (sub)orbicular; anterior (lower or abaxial) lip 3-lobed, unequal, the middle one 5-7 
<normalizedToken originalValue="×">x</normalizedToken>
7-10 mm, the lateral ones 5-7 
<normalizedToken originalValue="×">x</normalizedToken>
4.5-5 mm, apices rounded; posterior (upper or adaxial) lip 2-lobed, slightly equal, 5-6 
<normalizedToken originalValue="×">x</normalizedToken>
7.5-8.5 mm, apices rounded. 
<emphasis bold="true" pageId="0" pageNumber="35">Stamens</emphasis>
2, inserted at 2.2-2.4 cm above the base of the corolla; filaments slender, white, glabrous, 7-8 mm long, glandular-puberulent on the connective; anthers brownish, oblong, 2-2.2 
<normalizedToken originalValue="×">x</normalizedToken>
ca. 1 mm, tips and bases rounded, white-bearded; 
<emphasis bold="true" pageId="0" pageNumber="35">staminodes</emphasis>
3, inserted ca. 3 mm below the stamens, reduced to filaments, equal in length, 2.5-3.5 mm long, glabrous, tips with few glandular-puberulent. 
<emphasis bold="true" pageId="0" pageNumber="35">Disc</emphasis>
cupular, ca. 1 mm high, margin irregular sinuate. 
<emphasis bold="true" pageId="0" pageNumber="35">Pistil</emphasis>
ca. 3.2 cm long; 
<emphasis bold="true" pageId="0" pageNumber="35">ovary</emphasis>
cylindrical, greenish with white towards the base, ca. 3 cm long, 1-1.5 mm in diam., densely glandular-puberulent; 
<emphasis bold="true" pageId="0" pageNumber="35">style</emphasis>
continuous with the top of the ovary, ca. 2 
<normalizedToken originalValue="×">x</normalizedToken>
1 mm, whitish, sparsely glandular-puberulent; 
<emphasis bold="true" pageId="0" pageNumber="35">stigma</emphasis>
irregular capitate, ca. 1 
<normalizedToken originalValue="×">x</normalizedToken>
1 mm, concave, white, papillose. 
<emphasis bold="true" pageId="0" pageNumber="35">Capsules</emphasis>
straight to slightly curved, linear, glabrous, 2-valved, loculicidal dehiscent, 4.4-55 cm long, 1-1.5 mm in diam., turning brown when ripe, calyx and style persistent. 
<emphasis bold="true" pageId="0" pageNumber="35">Pollen</emphasis>
and 
<emphasis bold="true" pageId="0" pageNumber="35">Seeds</emphasis>
not studied.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="distribution">
<paragraph pageId="0" pageNumber="35">Distribution and habitat.</paragraph>
<paragraph pageId="0" pageNumber="35">
This species grows in moist places and shaded areas in primary tropical evergreen forests, on granite bedrock along streams or on moist and mossy cliffs in Phu Quoc NP, at 80-530 m elev. (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Distribution map of Didymocarpus phuquocensis in Phu Quoc National Park, Phu Quoc Island, Kien Giang Province." figureDoi="10.3897/phytokeys.159.47442.figure2" httpUri="https://binary.pensoft.net/fig/449282" pageId="0" pageNumber="35">2</figureCitation>
).
</paragraph>
<caption doi="10.3897/phytokeys.159.47442.figure2" httpUri="https://binary.pensoft.net/fig/449282" pageId="0" pageNumber="35" start="Figure 2" startId="F2">
<paragraph pageId="0" pageNumber="35">
<emphasis bold="true" pageId="0" pageNumber="35">Figure 2.</emphasis>
Distribution map of 
<taxonomicName authorityName="N. S. Ly, T. L. Tran &amp; N. G. Cao" authorityYear="2020" class="Magnoliopsida" family="Gesneriaceae" genus="Didymocarpus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Didymocarpus phuquocensis" order="Lamiales" pageId="0" pageNumber="35" phylum="Tracheophyta" rank="species" species="phuquocensis">
<emphasis italics="true" pageId="0" pageNumber="35">Didymocarpus phuquocensis</emphasis>
</taxonomicName>
in Phu Quoc National Park, Phu Quoc Island, Kien Giang Province.
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="phenology">
<paragraph pageId="0" pageNumber="35">Phenology.</paragraph>
<paragraph pageId="0" pageNumber="35">Flowering and fruiting from May to October.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="etymology">
<paragraph pageId="0" pageNumber="35">Etymology.</paragraph>
<paragraph pageId="0" pageNumber="35">
The specific epithet &quot; 
<emphasis italics="true" pageId="0" pageNumber="35">phuquocensis</emphasis>
&quot; was named after the type locality.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="provisional conservation status">
<paragraph pageId="0" pageNumber="35">Provisional conservation status.</paragraph>
<paragraph pageId="0" pageNumber="35">
At present, four relatively-large subpopulations consisting of about 2000 mature individuals/mature clumps have been observed in Phu Quoc NP. The extent of occurrence (EOO) and the area of occupancy (AOO) were estimated using the web Geospatial Conservation Assessment Tool or GeoCAT (
<bibRefCitation DOI="https://doi.org/10.3897/zookeys.150.2109" author="Bachman, S" journalOrPublisher="ZooKeys" pageId="0" pageNumber="35" pagination="117 - 126" refId="B1" refString="Bachman, S, Moat, J, Hill, AW, de Torre, J, Scott, B, 2011. Supporting Red List threat assessments with GeoCAT: Geospatial conservation assessment tool. ZooKeys 150: 117 - 126, DOI: https://doi.org/10.3897/zookeys.150.2109" title="Supporting Red List threat assessments with GeoCAT: Geospatial conservation assessment tool." url="https://doi.org/10.3897/zookeys.150.2109" volume="150" year="2011">Bachman et al. 2011</bibRefCitation>
) and the auto-value cells width 2 km were calculated to be 53.7 km2 and 16 km2, respectively. These two values meet the criteria B1 (EOO &lt;100 km2) for Critically Endangered and B2 (AOO &lt;500 km2) for Endangered, following the IUCN Red List Categories and Criteria Version 3.1 (
<bibRefCitation author="IUCN" journalOrPublisher="PhytoKeys" pageId="0" pageNumber="35" publicationUrl="http://www.iucnredlist.org/documents/RedListGuidelines.pdf" refId="B9" refString="IUCN, 2019. Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Subcommittee. http://www.iucnredlist.org/documents/RedListGuidelines.pdf" title="Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Subcommittee." url="http://www.iucnredlist.org/documents/RedListGuidelines.pdf" year="2019">IUCN 2019</bibRefCitation>
). Although the known habitat of the new species is protected as part of the National Park, its habitat is fragmented and still faces some risk due to loss of the habitat within some parts of its range (in particular the clearing of forest land for agricultural fields and building of numerous roads and tourism areas). Based on the IUCN Red List Criteria (
<bibRefCitation author="IUCN" journalOrPublisher="PhytoKeys" pageId="0" pageNumber="35" publicationUrl="http://www.iucnredlist.org/documents/RedListGuidelines.pdf" refId="B9" refString="IUCN, 2019. Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Subcommittee. http://www.iucnredlist.org/documents/RedListGuidelines.pdf" title="Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Subcommittee." url="http://www.iucnredlist.org/documents/RedListGuidelines.pdf" year="2019">IUCN 2019</bibRefCitation>
), we therefore provisionally assess this species as Endangered (EN B2ab(iii), C).
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="materials_examined">
<paragraph pageId="0" pageNumber="35">Other specimens examined</paragraph>
<paragraph pageId="0" pageNumber="35">
<emphasis bold="true" pageId="0" pageNumber="35">
(
<emphasis italics="true" pageId="0" pageNumber="35">Paratypes</emphasis>
).
</emphasis>
Vietnam. Kien Giang Province: Phu Quoc Island, Phu Quoc NP, K7 peak, 
<geoCoordinate degrees="10" direction="north" minutes="21" orientation="latitude" precision="1" seconds="53.42" value="10.36484">10°21'53.42&quot;N</geoCoordinate>
, 
<geoCoordinate degrees="104" direction="east" minutes="0" orientation="longitude" precision="1" seconds="31.22" value="104.008675">104°0'31.22&quot;E</geoCoordinate>
, 356 m elev., 21 May 2019, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Lý">Ly</normalizedToken>
Ngọc 
<normalizedToken originalValue="Sâm">Sam</normalizedToken>
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Hà">Ha</normalizedToken>
<normalizedToken originalValue="Văn">Văn</normalizedToken>
Long
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">TNB-430</emphasis>
(VNM); the same locality, Nui Chua peak, 
<geoCoordinate degrees="10" direction="north" minutes="22" orientation="latitude" precision="1" seconds="40.09" value="10.377803">10°22'40.09&quot;N</geoCoordinate>
, 
<geoCoordinate degrees="104" direction="east" minutes="2" orientation="longitude" precision="1" seconds="6.24" value="104.035065">104°2'6.24&quot;E</geoCoordinate>
, 532 m elev., 22 July 2019, 
<emphasis italics="true" pageId="0" pageNumber="35">Cao Ngọc Giang</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Ngô">Ngo</normalizedToken>
Minh Huyền
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Hà">Ha</normalizedToken>
<normalizedToken originalValue="Văn">Văn</normalizedToken>
Long
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">TNB-502</emphasis>
(VNM); the same locality, Ham Rong Mount, 
<geoCoordinate degrees="10" direction="north" minutes="24" orientation="latitude" precision="1" seconds="6.34" value="10.401761">10°24'6.34&quot;N</geoCoordinate>
, 
<geoCoordinate degrees="103" direction="east" minutes="58" orientation="longitude" precision="1" seconds="6.47" value="103.96847">103°58'6.47&quot;E</geoCoordinate>
, 351 m elev., 10 July 2019, 
<emphasis italics="true" pageId="0" pageNumber="35">Cao Ngọc Giang</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Ngô">Ngo</normalizedToken>
Minh Huyền
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">
<normalizedToken originalValue="Hà">Ha</normalizedToken>
<normalizedToken originalValue="Văn">Văn</normalizedToken>
Long
</emphasis>
, 
<emphasis italics="true" pageId="0" pageNumber="35">TNB-508</emphasis>
(VNM).
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="vernacular name">
<paragraph pageId="0" pageNumber="35">Vernacular name.</paragraph>
<paragraph pageId="0" pageNumber="35">
Vietnamese language: Song bế 
<normalizedToken originalValue="phú">phu</normalizedToken>
quốc.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="35" type="taxonomic notes">
<paragraph pageId="0" pageNumber="35">Taxonomic notes.</paragraph>
<paragraph pageId="0" pageNumber="35">
Morphologically, the 3-verticillate petiolate leaves of 
<taxonomicName lsidName="D. phuquocensis" pageId="0" pageNumber="35" rank="species" species="phuquocensis">
<emphasis italics="true" pageId="0" pageNumber="35">D. phuquocensis</emphasis>
</taxonomicName>
are shared with several species of 
<taxonomicName class="Magnoliopsida" family="Gesneriaceae" genus="Didymocarpus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Didymocarpus" order="Lamiales" pageId="0" pageNumber="35" phylum="Tracheophyta" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="35">Didymocarpus</emphasis>
</taxonomicName>
, such as 
<taxonomicName lsidName="D. insulsus" pageId="0" pageNumber="35" rank="species" species="insulsus">
<emphasis italics="true" pageId="0" pageNumber="35">D. insulsus</emphasis>
</taxonomicName>
Craib (north-eastern, Thailand), 
<taxonomicName lsidName="D. tristis" pageId="0" pageNumber="35" rank="species" species="tristis">
<emphasis italics="true" pageId="0" pageNumber="35">D. tristis</emphasis>
</taxonomicName>
Craib (Chanthaburi Province, south-eastern Thailand), 
<taxonomicName lsidName="D. dongrakensis" pageId="0" pageNumber="35" rank="species" species="dongrakensis">
<emphasis italics="true" pageId="0" pageNumber="35">D. dongrakensis</emphasis>
</taxonomicName>
B.L.Burtt (northeast Thailand) 
<taxonomicName lsidName="D. newmanii" pageId="0" pageNumber="35" rank="species" species="newmanii">
<emphasis italics="true" pageId="0" pageNumber="35">D. newmanii</emphasis>
</taxonomicName>
B.L.Burtt (Chanthaburi Province, south-eastern Thailand), 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
(from India, Buhtan, Nepal, China to Vietnam), 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
(Assam, Arunachal Pradesh, Meghalaya and Sikkim, India), 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
(Assam, Meghalaya and Nagaland, India) (
<bibRefCitation author="Wang, WT" editor="Wu, ZY" journalOrPublisher="18). Science Press, Beijing &amp; Missouri Botanical Garden, St. Louis" pageId="0" pageNumber="35" pagination="349 - 358" refId="B30" refString="Wang, WT, Pan, K, Li, Z, Weitzman, AL, Skog, LE, 1998. Gesneriaceae. In: Wu, ZY, Raven, PH, Eds., Flora of China (Vol. 18). Science Press, Beijing &amp; Missouri Botanical Garden, St. Louis: 349 - 358" title="Gesneriaceae." volumeTitle="Flora of China (Vol." year="1998">Wang et al. 1998</bibRefCitation>
; 
<bibRefCitation author="Nangngam, P" journalOrPublisher="Gardens' Bulletin (Singapore)" pageId="0" pageNumber="35" pagination="185 - 225" refId="B17" refString="Nangngam, P, Maxwell, JF, 2013. Didymocarpus (Gesneriaceae) in Thailand. Gardens' Bulletin (Singapore) 65 (2): 185 - 225" title="Didymocarpus (Gesneriaceae) in Thailand." volume="65" year="2013">Nangngam and Maxwell 2013</bibRefCitation>
; 
<bibRefCitation DOI="https://doi.org/10.15625/0866-7160/v36n1.4516" author="Phuong, VX" journalOrPublisher="Academia Journal of Biology" pageId="0" pageNumber="35" pagination="45 - 49" refId="B22" refString="Phuong, VX, Dang, QV, Xuyen, DT, 2014. Genus Didymocarpus Wall. and a new record of species Didymocarpus purpureobracteatus Smith for the flora of Vietnam from Xuan Lien natural reserve, Thanh Hoa province. Academia Journal of Biology 36 (1): 45 - 49, DOI: https://doi.org/10.15625/0866-7160/v36n1.4516" title="Genus Didymocarpus Wall. and a new record of species Didymocarpus purpureobracteatus Smith for the flora of Vietnam from Xuan Lien natural reserve, Thanh Hoa province." url="https://doi.org/10.15625/0866-7160/v36n1.4516" volume="36" year="2014">Phuong et al. 2014</bibRefCitation>
; 
<bibRefCitation DOI="https://doi.org/10.20324/nelumbo/v58/2016/105932" author="Sinha, BK" journalOrPublisher="Nelumbo" pageId="0" pageNumber="35" pagination="1 - 43" refId="B25" refString="Sinha, BK, Datta, S, 2016. Taxonomic account on the family Gesneriaceae in Northeast India. Nelumbo 58 (0): 1 - 43, DOI: https://doi.org/10.20324/nelumbo/v58/2016/105932" title="Taxonomic account on the family Gesneriaceae in Northeast India." url="https://doi.org/10.20324/nelumbo/v58/2016/105932" volume="58" year="2016">Sinha and Datta 2016</bibRefCitation>
; 
<bibRefCitation author="Roy, S" journalOrPublisher="Academia Journal of Biology" pageId="0" pageNumber="35" refId="B23" refString="Roy, S, 2017. Taxonomic studies of the family Gesneriaceae of Indian part of eastern Himalaya. PhD Thesis, University of Kalyani, West Bengal, India." title="Taxonomic studies of the family Gesneriaceae of Indian part of eastern Himalaya. PhD Thesis, University of Kalyani, West Bengal, India." year="2017">Roy 2017</bibRefCitation>
). Of these, the campanulate calyx of the new species is similar to 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
, 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
and 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
, but distinguished from 
<taxonomicName lsidName="D. insulsus" pageId="0" pageNumber="35" rank="species" species="insulsus">
<emphasis italics="true" pageId="0" pageNumber="35">D. insulsus</emphasis>
</taxonomicName>
, 
<taxonomicName lsidName="D. newmanii" pageId="0" pageNumber="35" rank="species" species="newmanii">
<emphasis italics="true" pageId="0" pageNumber="35">D. newmanii</emphasis>
</taxonomicName>
and 
<taxonomicName lsidName="D. tristis" pageId="0" pageNumber="35" rank="species" species="tristis">
<emphasis italics="true" pageId="0" pageNumber="35">D. tristis</emphasis>
</taxonomicName>
which have the calyx 5-lobed to the base. 
<taxonomicName authorityName="N. S. Ly, T. L. Tran &amp; N. G. Cao" authorityYear="2020" class="Magnoliopsida" family="Gesneriaceae" genus="Didymocarpus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Didymocarpus phuquocensis" order="Lamiales" pageId="0" pageNumber="35" phylum="Tracheophyta" rank="species" species="phuquocensis">
<emphasis italics="true" pageId="0" pageNumber="35">Didymocarpus phuquocensis</emphasis>
</taxonomicName>
is most similar to 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
, 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
and 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
in the morphological characters of 3-verticillate petiole leaves, the same shape of calyx, corolla, stamens, pistil and fruit. The major differences between the new species and the three latter are outlined above in the diagnosis. Moreover, the shorter plant height ((8-)10-19 cm), the narrowly elliptic to elliptic-ovate leaf blades that have serrate leaf margins, attenuate to cuneate leaf base and attenuate to acute leaf apex, the oblong-lanceolate bracts being abaxially densely multicellular glandular-pubescent, the light purple corolla and sparsely glandular-puberulent styles of 
<taxonomicName lsidName="D. phuquocensis" pageId="0" pageNumber="35" rank="species" species="phuquocensis">
<emphasis italics="true" pageId="0" pageNumber="35">D. phuquocensis</emphasis>
</taxonomicName>
also distinguish it from 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
, 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
and 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
. A detailed morphological comparison between 
<taxonomicName lsidName="D. phuquocensis" pageId="0" pageNumber="35" rank="species" species="phuquocensis">
<emphasis italics="true" pageId="0" pageNumber="35">D. phuquocensis</emphasis>
</taxonomicName>
, 
<taxonomicName lsidName="D. pulcher" pageId="0" pageNumber="35" rank="species" species="pulcher">
<emphasis italics="true" pageId="0" pageNumber="35">D. pulcher</emphasis>
</taxonomicName>
, 
<taxonomicName lsidName="D. hookeri" pageId="0" pageNumber="35" rank="species" species="hookeri">
<emphasis italics="true" pageId="0" pageNumber="35">D. hookeri</emphasis>
</taxonomicName>
and 
<taxonomicName lsidName="D. punduanus" pageId="0" pageNumber="35" rank="species" species="punduanus">
<emphasis italics="true" pageId="0" pageNumber="35">D. punduanus</emphasis>
</taxonomicName>
is provided in Table 
<tableCitation captionStart="Table 1" captionStartId="T1" captionText="Table 1. Morphological comparison of D. puhoatensis with its most closely-related taxa (based on Wallich 1829; Clarke 1874, 1883, 1484; Sinha and Datta 2016; Roy 2017)." httpUri="http://table.plazi.org/id/51D14DE13EB71591939030E3CB7174E0" pageId="0" pageNumber="35" tableUuid="51D14DE13EB71591939030E3CB7174E0">1</tableCitation>
.
</paragraph>
</subSubSection>
</treatment>
</document>