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<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.180.69194" ID-GBIF-Dataset="4a4f35eb-49c2-44bc-ade7-82c880ebb96c" ID-PMC="PMC8355010" ID-Pensoft-Pub="1314-2003-180-73" ID-Pensoft-UUID="92EAF13EC9ED5F199DA93419C15E21BE" ID-PubMed="34393578" ModsDocID="1314-2003-180-73" checkinTime="1628022045618" checkinUser="pensoft" docAuthor="Rabarijaona, Romer Narindra, Rafaralahy, Valisoa Louisicael, Rakotovao, Charles, Ranaivoson, Rindra Manasoa, Liu, Bing, Chen, Zhi-Duan, Wen, Jun &amp; Lu, Li-Min" docDate="2021" docId="3C656A323BDC5D57A359175EE0BFD491" docLanguage="en" docName="PhytoKeys 180: 73-80" docOrigin="PhytoKeys 180" docPubDate="2021-08-03" docSource="http://dx.doi.org/10.3897/phytokeys.180.69194" docTitle="Cyphostemma calcarium Rabarij &amp; L. M. Lu 2021, sp. nov." docType="treatment" docVersion="4" id="92EAF13EC9ED5F199DA93419C15E21BE" lastPageNumber="73" masterDocId="92EAF13EC9ED5F199DA93419C15E21BE" masterDocTitle="Cyphostemma calcarium, a new species of Vitaceae from the Ankarana Special Reserve, Madagascar" masterLastPageNumber="80" masterPageNumber="73" pageNumber="73" updateTime="1668140397831" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Cyphostemma calcarium, a new species of Vitaceae from the Ankarana Special Reserve, Madagascar</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Rabarijaona, Romer Narindra</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0003-0472-501X</mods:nameIdentifier>
<mods:affiliation>State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China &amp; University of Chinese Academy of Sciences, Beijing 100049, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Rafaralahy, Valisoa Louisicael</mods:namePart>
<mods:affiliation>Department of Plant Biology and Ecology, Faculty of Sciences, University of Antananarivo, Madagascar</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Rakotovao, Charles</mods:namePart>
<mods:affiliation>Missouri Botanical Garden, Madagascar Research and Conservation Program, BP 3391, Antananarivo 101, Madagascar</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Ranaivoson, Rindra Manasoa</mods:namePart>
<mods:affiliation>State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China &amp; University of Chinese Academy of Sciences, Beijing 100049, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Liu, Bing</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-6086-253X</mods:nameIdentifier>
<mods:affiliation>State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China &amp; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Chen, Zhi-Duan</mods:namePart>
<mods:affiliation>State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China &amp; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Wen, Jun</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-6353-522X</mods:nameIdentifier>
<mods:affiliation>Department of Botany, National Museum of Natural History, MRC 166, Smithsonian Institution, Washington, D. C. 20013 - 7012, USA</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Lu, Li-Min</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-6973-7877</mods:nameIdentifier>
<mods:affiliation>State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China</mods:affiliation>
<mods:nameIdentifier type="email">liminlu@ibcas.ac.cn</mods:nameIdentifier>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
<mods:title>PhytoKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2021</mods:date>
<mods:detail type="pubDate">
<mods:number>2021-08-03</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>180</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>73</mods:start>
<mods:end>80</mods:end>
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<mods:location>
<mods:url>http://dx.doi.org/10.3897/phytokeys.180.69194</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.180.69194</mods:identifier>
<mods:identifier type="Pensoft-Pub">1314-2003-180-73</mods:identifier>
<mods:identifier type="Pensoft-UUID">92EAF13EC9ED5F199DA93419C15E21BE</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="183917620" LSID="urn:lsid:plazi:treatment:3C656A323BDC5D57A359175EE0BFD491" httpUri="http://treatment.plazi.org/id/3C656A323BDC5D57A359175EE0BFD491" lastPageNumber="73" pageId="0" pageNumber="73">
<subSubSection pageId="0" pageNumber="73" type="nomenclature">
<paragraph pageId="0" pageNumber="73">
<taxonomicName LSID="3C656A32-3BDC-5D57-A359-175EE0BFD491" authority="Rabarij &amp; L. M. Lu" authorityName="Rabarij &amp; L. M. Lu" authorityYear="2021" class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma calcarium" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="species" species="calcarium" status="sp. nov.">Cyphostemma calcarium Rabarij &amp; L.M.Lu</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="73">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="description">
<paragraph pageId="0" pageNumber="73">
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Comparison of two shrubby Cyphostemma species with 3 - foliolate leaves in the Ankarana Special Reserve A-E Cyphostemma calcarium sp. nov. A branches showing puberulent leaves and infructescence B-E seed morphology from Rakotovao C. et al. 6376 (Dorsal, ventral, lateral, and cross-section presented from left to right) F-J Cyphostemma rutilans Desc. F branches with glabrous leaves and inflorescence G-J seed morphology from Bardot-Vaucoulon M. 817 (Dorsal, ventral, lateral, and cross-section presented from left to right). Photos by Rakotovao Charles, Missouri Botanical Garden (A); Billiet Frieda, Meise Botanic Garden (F). The red arrow indicates an extra layer of endotestal sclereids covering the ventral infolds. Scale bars: 1 mm" figureDoi="10.3897/phytokeys.180.69194.figure2" httpUri="https://binary.pensoft.net/fig/574014" pageId="0" pageNumber="73">Figs 2</figureCitation>
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Cyphostemma calcarium sp. nov. A branches showing the inflorescence and infructescence and the bark with distinct lenticels B trichomes on the abaxial leaflet surface C flower bud constricted at the middle D flower with petals and stamens removed to show the floral disc of 4 - large free glands E fruit with a persistent stigma (Illustration by Ai-Li Li; based on Rakotovao C. et al. 6376, TAN)." figureDoi="10.3897/phytokeys.180.69194.figure3" httpUri="https://binary.pensoft.net/fig/574015" pageId="0" pageNumber="73">, 3</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="diagnosis">
<paragraph pageId="0" pageNumber="73">Diagnosis.</paragraph>
<paragraph pageId="0" pageNumber="73">
<taxonomicName authorityName="Rabarij &amp; L. M. Lu" authorityYear="2021" class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma calcarium" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="species" species="calcarium">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma calcarium</emphasis>
</taxonomicName>
is most closely comparable to
<taxonomicName lsidName="C. rutilans" pageId="0" pageNumber="73" rank="species" species="rutilans">
<emphasis italics="true" pageId="0" pageNumber="73">C. rutilans</emphasis>
</taxonomicName>
Desc. in morphology. It differs from the latter in having distinct pubescent branches (vs. branches entirely glabrous in
<taxonomicName lsidName="C. rutilans" pageId="0" pageNumber="73" rank="species" species="rutilans">
<emphasis italics="true" pageId="0" pageNumber="73">C. rutilans</emphasis>
</taxonomicName>
); leaves minutely puberulous and shiny on the adaxial surface, abaxial surface densely whitish pubescent to velvety particularly on the veins (vs. leaves entirely glabrous and shiny on both sides in
<taxonomicName lsidName="C. rutilans" pageId="0" pageNumber="73" rank="species" species="rutilans">
<emphasis italics="true" pageId="0" pageNumber="73">C. rutilans</emphasis>
</taxonomicName>
); and leaflets broadly oblong or elliptic, base cuneate (vs. leaflets narrowly ovate, base subcordate in
<taxonomicName lsidName="C. rutilans" pageId="0" pageNumber="73" rank="species" species="rutilans">
<emphasis italics="true" pageId="0" pageNumber="73">C. rutilans</emphasis>
</taxonomicName>
). Seeds of
<taxonomicName lsidName="C. calcarium" pageId="0" pageNumber="73" rank="species" species="calcarium">
<emphasis italics="true" pageId="0" pageNumber="73">C. calcarium</emphasis>
</taxonomicName>
are ellipsoid in outline, 7-7.5
<normalizedToken originalValue="×">x</normalizedToken>
3-3.5 mm, surface rugose to
<normalizedToken originalValue="±">+/-</normalizedToken>
muricate (vs. seeds globose, 5-6.5 mm in diameter, surface strongly rugose in
<taxonomicName lsidName="C. rutilans" pageId="0" pageNumber="73" rank="species" species="rutilans">
<emphasis italics="true" pageId="0" pageNumber="73">C. rutilans</emphasis>
</taxonomicName>
).
</paragraph>
<caption doi="10.3897/phytokeys.180.69194.figure2" httpUri="https://binary.pensoft.net/fig/574014" pageId="0" pageNumber="73" start="Figure 2" startId="F2">
<paragraph pageId="0" pageNumber="73">
<emphasis bold="true" pageId="0" pageNumber="73">Figure 2.</emphasis>
Comparison of two shrubby
<taxonomicName class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma</emphasis>
</taxonomicName>
species with 3-foliolate leaves in the Ankarana Special Reserve
<emphasis bold="true" pageId="0" pageNumber="73">A-E</emphasis>
<taxonomicName authorityName="Rabarij &amp; L. M. Lu" authorityYear="2021" class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma calcarium" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="species" species="calcarium">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma calcarium</emphasis>
</taxonomicName>
sp. nov.
<emphasis bold="true" pageId="0" pageNumber="73">A</emphasis>
branches showing puberulent leaves and infructescence
<emphasis bold="true" pageId="0" pageNumber="73">B-E</emphasis>
seed morphology from
<emphasis italics="true" pageId="0" pageNumber="73">Rakotovao C. et al.</emphasis>
6376 (Dorsal, ventral, lateral, and cross-section presented from left to right)
<emphasis bold="true" pageId="0" pageNumber="73">F-J</emphasis>
<taxonomicName class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma rutilans" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="species" species="rutilans">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma rutilans</emphasis>
</taxonomicName>
Desc.
<emphasis bold="true" pageId="0" pageNumber="73">F</emphasis>
branches with glabrous leaves and inflorescence
<emphasis bold="true" pageId="0" pageNumber="73">G-J</emphasis>
seed morphology from Bardot-Vaucoulon M. 817 (Dorsal, ventral, lateral, and cross-section presented from left to right). Photos by Rakotovao Charles, Missouri Botanical Garden (
<emphasis bold="true" pageId="0" pageNumber="73">A</emphasis>
); Billiet Frieda, Meise Botanic Garden (
<emphasis bold="true" pageId="0" pageNumber="73">F</emphasis>
). The red arrow indicates an extra layer of endotestal sclereids covering the ventral infolds. Scale bars: 1 mm
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="materials_examined">
<paragraph pageId="0" pageNumber="73">
<typeStatus>Type</typeStatus>
.
</paragraph>
<paragraph pageId="0" pageNumber="73">
<materialsCitation collectingDate="2013-05-16" collectorName="Rakotovao C." country="Madagascar" county="Diana" elevation="97" latitude="-12.940001" location="Tsingy Rary" longLatPrecision="15" longitude="49.117775" municipality="Ankarana Special Reserve" specimenCount="1" stateProvince="Antsiranana" typeStatus="holotype">
<emphasis bold="true" pageId="0" pageNumber="73">
<collectingCountry name="Madagascar">Madagascar</collectingCountry>
.
</emphasis>
<collectingRegion country="Madagascar" name="Antsiranana">Antsiranana</collectingRegion>
:
<collectingCounty>Diana</collectingCounty>
,
<collectingMunicipality>Ankarana Special Reserve</collectingMunicipality>
,
<location LSID="urn:lsid:plazi:treatment:3C656A323BDC5D57A359175EE0BFD491:B12540CF60640CA1285DFBA98D3094EA" country="Madagascar" county="Diana" latitude="-12.940001" longLatPrecision="15" longitude="49.117775" municipality="Ankarana Special Reserve" name="Tsingy Rary" stateProvince="Antsiranana">Tsingy Rary</location>
,
<geoCoordinate degrees="12" direction="south" minutes="56" orientation="latitude" precision="1" seconds="24.00" value="-12.940001">12°56'24.00&quot;S</geoCoordinate>
,
<geoCoordinate degrees="49" direction="east" minutes="07" orientation="longitude" precision="15" seconds="04" value="49.117775">49°07'04&quot;E</geoCoordinate>
,
<quantity metricMagnitude="1" metricUnit="m" metricValue="9.7" unit="m" value="97.0">
<elevation metricMagnitude="1" metricUnit="m" metricValue="9.7" unit="m" value="97.0">97 m</elevation>
</quantity>
,
<collectingDate value="2013-05-16">16 May 2013</collectingDate>
,
<emphasis italics="true" pageId="0" pageNumber="73">
<collectorName>Rakotovao C.</collectorName>
et al.
</emphasis>
6376 (
<typeStatus>holotype</typeStatus>
: TAN!)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="description">
<paragraph pageId="0" pageNumber="73">Description.</paragraph>
<paragraph pageId="0" pageNumber="73">
Succulent erect shrub, up to 2 m tall. Old stems swollen, succulent; bark smooth, lenticellate; branches brown to reddish, shortly pubescent. Tendrils absent. Stipules triangular to
<normalizedToken originalValue="±">+/-</normalizedToken>
falcate, 4-5
<normalizedToken originalValue="×">x</normalizedToken>
1.5-2.5 mm, soon caducous. Leaves 3-foliolate, central leaflet often drooping, somewhat thick and fleshy when fresh, becoming coriaceous when dry, usually folded upwards along the midrib; leaflets 3-5
<normalizedToken originalValue="×">x</normalizedToken>
1.5-2.5 cm, broadly oblong or elliptic, base cuneate, rounded to obtuse at the apex, margin shallowly denticulate; minutely puberulous and shiny on the adaxial surface, abaxial surface densely whitish pubescent to velvety particularly on the veins; venation closely reticulate, prominent. Petioles 1.5-2.5 cm long. Petiolules equal, up to 1 cm long. Inflorescence a compound dichasium, terminal, ca. 7.5 cm long, very shortly pubescent; bracts inconspicuous; pedicels 2-4 mm. Floral buds
<normalizedToken originalValue="±">+/-</normalizedToken>
2.5 mm long, minutely puberulous or glabrescent; sepals
<normalizedToken originalValue="±">+/-</normalizedToken>
0.5 mm long; petals reddish; stamens 4, filaments cylindrical, ca. 2.2 mm long, anthers ca. 0.8 mm long; ovary glabrous, styles
<normalizedToken originalValue="±">+/-</normalizedToken>
2.5 mm long. Fruits ellipsoid, 9-12
<normalizedToken originalValue="×">x</normalizedToken>
5-7 mm, glabrous. Seeds broadly ellipsoid, 7-7.5
<normalizedToken originalValue="×">x</normalizedToken>
3-3.5 mm, rugose; base rostrate; beak conspicuous; apex revolute; rugae apex shallowly conspicuous on both surfaces; chalaza linear, sinuate, up to 6 mm long (ca. 6/7 of seed length); ventral ridge raised, elongate but widened in the middle, extending up to 6/7 of seed length; endosperm m-shaped in cross-section.
</paragraph>
<caption doi="10.3897/phytokeys.180.69194.figure3" httpUri="https://binary.pensoft.net/fig/574015" pageId="0" pageNumber="73" start="Figure 3" startId="F3">
<paragraph pageId="0" pageNumber="73">
<emphasis bold="true" pageId="0" pageNumber="73">Figure 3.</emphasis>
<taxonomicName authorityName="Rabarij &amp; L. M. Lu" authorityYear="2021" class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma calcarium" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="species" species="calcarium">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma calcarium</emphasis>
</taxonomicName>
sp. nov.
<emphasis bold="true" pageId="0" pageNumber="73">A</emphasis>
branches showing the inflorescence and infructescence and the bark with distinct lenticels
<emphasis bold="true" pageId="0" pageNumber="73">B</emphasis>
trichomes on the abaxial leaflet surface
<emphasis bold="true" pageId="0" pageNumber="73">C</emphasis>
flower bud constricted at the middle
<emphasis bold="true" pageId="0" pageNumber="73">D</emphasis>
flower with petals and stamens removed to show the floral disc of 4-large free glands
<emphasis bold="true" pageId="0" pageNumber="73">E</emphasis>
fruit with a persistent stigma (Illustration by Ai-Li Li; based on
<emphasis italics="true" pageId="0" pageNumber="73">Rakotovao C. et al.</emphasis>
6376, TAN).
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="phenology">
<paragraph pageId="0" pageNumber="73">Phenology.</paragraph>
<paragraph pageId="0" pageNumber="73">Flowering and fruiting around May.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="etymology">
<paragraph pageId="0" pageNumber="73">Etymology.</paragraph>
<paragraph pageId="0" pageNumber="73">The epithet of the species refers to the habitats on limestone outcrops.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="distribution">
<paragraph pageId="0" pageNumber="73">Distribution and habitat.</paragraph>
<paragraph pageId="0" pageNumber="73">
It grows on limestone outcrops in northern Madagascar at an altitude of 90-300 m. (Fig.
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Distribution map of Cyphostemma calcarium sp. nov. with the black dot showing the locality of the type specimens. Map on the right shows the position of Ankarana Special Reserve in Madagascar." figureDoi="10.3897/phytokeys.180.69194.figure1" httpUri="https://binary.pensoft.net/fig/574013" pageId="0" pageNumber="73">1</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="provisional conservation assessment">
<paragraph pageId="0" pageNumber="73">Provisional conservation assessment.</paragraph>
<paragraph pageId="0" pageNumber="73">
The new species is endemic to Madagascar with distribution restricted to its type locality. It is assessed here as Critically Endangered (CR) according to the IUCN Categories and Criteria (
<bibRefCitation author="IUCN" journalOrPublisher="Journal of Systematics and Evolution" pageId="0" pageNumber="73" refId="B7" refString="IUCN, 2019. Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. [accessed 20.01.2020]" title="Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. [accessed 20.01.2020]" year="2019">IUCN 2019</bibRefCitation>
). Even though the species occurs within a protected area, succulent plants are still highly sought after by collectors for their horticultural values. Seeds of
<taxonomicName authorityName="Rabarij &amp; L. M. Lu" authorityYear="2021" class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma calcarium" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="species" species="calcarium">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma calcarium</emphasis>
</taxonomicName>
should therefore be collected, banked, and propagated to ensure its long-term conservation.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="73" type="taxonomic notes">
<paragraph pageId="0" pageNumber="73">Taxonomic notes.</paragraph>
<paragraph pageId="0" pageNumber="73">
This species is described from materials collected by
<emphasis italics="true" pageId="0" pageNumber="73">Rakotovao C. et al</emphasis>
. in 2013. It was initially identified as
<taxonomicName class="Magnoliopsida" family="Vitaceae" genus="Cissus" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Cissus pileata" order="Vitales" pageId="0" pageNumber="73" phylum="Angiospermae" rank="species" species="pileata">
<emphasis italics="true" pageId="0" pageNumber="73">Cissus pileata</emphasis>
</taxonomicName>
Desc., but it clearly belongs to
<taxonomicName class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma</emphasis>
</taxonomicName>
in having constricted flower buds and floral disks with four free glands. These characters, together with its M-shaped endosperm as viewed in cross sections of the seeds and the presence of extra layers of endotestal sclereids covering the ventral infolds in cross-section, clearly distinguish the new species from
<taxonomicName class="Magnoliopsida" family="Vitaceae" genus="Cissus" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Cissus" order="Vitales" pageId="0" pageNumber="73" phylum="Angiospermae" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="73">Cissus</emphasis>
</taxonomicName>
L. A summary of some diagnostic characters that differentiate this new species from other shrubby species of
<taxonomicName class="Magnoliopsida" family="Vitaceae" genus="Cyphostemma" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cyphostemma" order="Vitales" pageId="0" pageNumber="73" phylum="Tracheophyta" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="73">Cyphostemma</emphasis>
</taxonomicName>
in Ankarana Special Reserve is provided in Table
<tableCitation captionStart="Table 1" captionStartId="T1" captionText="Table 1. Morphological comparison of four shrubby tendril-less species of Cyphostemma in the Ankarana Special Reserve, Madagascar." httpUri="http://table.plazi.org/id/13ED5D4A1BD3CBB9FB895BC22919328A" pageId="0" pageNumber="73" tableUuid="13ED5D4A1BD3CBB9FB895BC22919328A">1</tableCitation>
.
</paragraph>
</subSubSection>
</treatment>
</document>