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<document id="2A3586776D5E42A9BFE3891275FBA381" ID-CLB-Dataset="56448" ID-DOI="10.11646/phytotaxa.591.2.7" ID-GBIF-Dataset="a94e2137-e356-43e3-a284-19bcd38d7ca2" ID-ISSN="1179-3163" ID-Zenodo-Dep="7797540" IM.bibliography_approvedBy="juliana" IM.illustrations_approvedBy="juliana" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_approvedBy="juliana" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="juliana" checkinTime="1680597030287" checkinUser="plazi" docAuthor="Do, Truong Van, Hoang, Thao Thi, Wen, Fang, Wanke, Stefan, Forbes, Malcolm &amp; Souladeth, Phetlasy" docDate="2023" docId="293BE63C6F17967B8CC6C64E878E5E9D" docLanguage="en" docName="phytotaxa.591.2.7.pdf" docOrigin="Phytotaxa 591 (2)" docSource="http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.7:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="7" docTitle="Aristolochia laotica T. V. Do. Until 2023, sp. nov." docType="treatment" docVersion="8" lastPageNumber="159" masterDocId="D5029E446F16967F8C4EC17A852D5900" masterDocTitle="Aristolochia laotica (subgen. Siphisia), a new species from Northeastern Laos" masterLastPageNumber="163" masterPageNumber="155" pageNumber="156" updateTime="1699513359560" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="5DF7F83F01D51F3DF64DE6B43DB35583">Aristolochia laotica (subgen. Siphisia), a new species from Northeastern Laos</mods:title>
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<mods:namePart id="6A014DF98231567A3D4747D2DAF13A6C">Do, Truong Van</mods:namePart>
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<mods:namePart id="E738EB2640C9796508B5ABB780611045">Hoang, Thao Thi</mods:namePart>
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<mods:namePart id="CAF8DCC7FEE7050A930610E16AA0DBA1">Wen, Fang</mods:namePart>
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<mods:affiliation id="2475429A52673CF705351A751C0D5F74">Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, CN- 541006 Guilin, China &amp; wenfang 760608 @ 139. com; https: // orcid. org / 0000 - 0002 - 3889 - 8835</mods:affiliation>
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<mods:namePart id="8A6B81EC4AE65C344BA08A4110CE0BAD">Wanke, Stefan</mods:namePart>
<mods:affiliation id="94B03E9B27597BA2DC0AA70A8927FDA7">Institut für Botanik, Technische Universität Dresden, Zellescher Weg 20 b, D- 01062 Dresden, Germany &amp; Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México</mods:affiliation>
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<mods:affiliation id="A93B5839D9A70D7B471F215A40ED9208">Monitor Geological Services, Phou Koud District, Xieng Khouang, Laos &amp; malforbes @ mail. com; https: // orcid. org / 0000 - 0003 - 1381 - 1710</mods:affiliation>
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<treatment id="293BE63C6F17967B8CC6C64E878E5E9D" ID-DOI="http://doi.org/10.5281/zenodo.7799894" ID-GBIF-Taxon="209487307" ID-Zenodo-Dep="7799894" LSID="urn:lsid:plazi:treatment:293BE63C6F17967B8CC6C64E878E5E9D" httpUri="http://treatment.plazi.org/id/293BE63C6F17967B8CC6C64E878E5E9D" lastPageId="4" lastPageNumber="159" pageId="1" pageNumber="156">
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<paragraph id="A12D572A6F17967E8CC6C64E866C5E4E" blockId="1.[136,833,1844,1871]" box="[136,833,1844,1871]" pageId="1" pageNumber="156">
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<taxonomicName id="66922CA96F17967E8CC6C64E84EE5E4F" ID-CoL="B8RKK" authority="T.V.Do" authorityName="T. V. Do. Until" authorityYear="2023" box="[136,451,1844,1871]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="1" pageNumber="156" phylum="Tracheophyta" rank="species" species="laotica" status="sp. nov.">
<emphasis id="93E68B386F17967E8CC6C64E84465E4F" bold="true" box="[136,363,1844,1871]" italics="true" pageId="1" pageNumber="156">Aristolochia laotica</emphasis>
T.V.Do
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,
<emphasis id="93E68B386F17967E8D81C64F87095E4E" box="[463,548,1845,1870]" italics="true" pageId="1" pageNumber="156">
<taxonomicNameLabel id="88D536436F17967E8D81C64F87095E4E" box="[463,548,1845,1870]" pageId="1" pageNumber="156" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
(
<figureCitation id="39A94BAF6F17967E8E7DC64E87AD5E4E" box="[563,640,1844,1870]" captionStart="FIGURE 1" captionStartId="2.[136,229,2008,2030]" captionTargetBox="[179,1408,242,1981]" captionTargetId="figure-63@2.[179,1408,242,1981]" captionTargetPageId="2" captionText="FIGURE 1. Aristolochia laotica T.V.Do, sp.nov. A. Habitat; B. Mature stems; C. A branch bearing leaves; D. Adaxial and abaxial leaf surface; E. 2-flowered cyme on old woody stems; F. Two 1-flowered cymes on old woody stems. Photo credits, M. Forbes." figureDoi="http://doi.org/10.5281/zenodo.7797544" httpUri="https://zenodo.org/record/7797544/files/figure.png" pageId="1" pageNumber="156">Figs. 1</figureCitation>
,
<figureCitation id="39A94BAF6F17967E8EC0C64E87B15E4E" box="[654,668,1844,1870]" captionStart="FIGURE2" captionStartId="3.[136,229,1599,1621]" captionTargetBox="[151,1436,190,1575]" captionTargetId="figure-17@3.[151,1436,190,1575]" captionTargetPageId="3" captionText="FIGURE2.AristolochialaoticaT.V.Do, sp.nov.A.Leaves; B.Innersurfaceoflimbandannulus(indicatedbyagreenarrow); C. Longitudinal section of perianth; D. Lateral view of perianth; E. Dorsal view of perianth; F. Ventral view of perianth G. Top and frontal view of perianth; H. Lateral view of gynostemium; I. Top view of gynostemium; J. Capsule. Photo credits, M. Forbes." figureDoi="http://doi.org/10.5281/zenodo.7797548" httpUri="https://zenodo.org/record/7797548/files/figure.png" pageId="1" pageNumber="156">2</figureCitation>
&amp;
<figureCitation id="39A94BAF6F17967E8E8EC64E86145E4E" box="[704,825,1844,1870]" captionStart="FIGURE 3" captionStartId="5.[136,229,1877,1899]" captionTargetBox="[151,1436,191,1853]" captionTargetId="figure-17@5.[151,1436,190,1853]" captionTargetPageId="5" captionText="FIGURE 3. Comparison of morphological traits of Aristolochia laotica T.V.Do, sp.nov. with A. vuquangensis and A. versicolor. A D. Aristolochia laotica. A. Leaf shape; B. Lateral view of perianth; C. Longitudinal section of perianth; D. Ventral view of perianth. EH. A. vuquangensis. E. Leaf shape; F. Lateral view of perianth; G. Longitudinal section of perianth; H. Ventral view of perianth. I K. Aristolochia versicolor. I. Leaf shape; J. Longitudinal section of perianth; K. Frontal and dorsal view of perianth. Photo credits, AD, M. Forbes; EK, Do Van Truong." figureDoi="http://doi.org/10.5281/zenodo.7797550" httpUri="https://zenodo.org/record/7797550/files/figure.png" pageId="1" pageNumber="156">Fig. 3AD</figureCitation>
)
</heading>
</paragraph>
</subSubSection>
<subSubSection id="E98804A16F17967D8CC6C606800959DC" lastPageId="2" lastPageNumber="157" pageId="1" pageNumber="156" type="description">
<paragraph id="A12D572A6F17967D8CC6C606800959DC" blockId="1.[136,1452,1916,2087]" lastBlockId="2.[136,1451,158,221]" lastPageId="2" lastPageNumber="157" pageId="1" pageNumber="156">
The new species is most similar to
<taxonomicName id="66922CA96F17967E8E59C606868A5E96" authority="T. V. Do (2021: 41)" authorityName="T. V. Do" authorityPageNumber="41" authorityYear="2021" box="[535,935,1916,1943]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="1" pageNumber="156" phylum="Tracheophyta" rank="species" species="vuquangensis">
<emphasis id="93E68B386F17967E8E59C60687E25E96" box="[535,719,1916,1942]" italics="true" pageId="1" pageNumber="156">A. vuquangensis</emphasis>
T.V.
<bibRefCitation id="C5032ADB6F17967E8F4AC607868A5E96" author="Do, T. V. &amp; Nguyen, H. V. &amp; Le, K. D." box="[772,935,1916,1943]" pageId="1" pageNumber="156" pagination="37 - 44" refId="ref4336" refString="Do, T. V., Nguyen, H. V. &amp; Le, K. D. (2021) Aristolochia vuquangensis (Aristolochiaceae), a new species from Central Vietnam. Phytotaxa 500 (1): 37 - 44. https: // doi. org / 10.11646 / phytotaxa. 500.1.5" type="journal article" year="2021">Do (2021: 41)</bibRefCitation>
</taxonomicName>
, a species endemic to Central
<collectingCountry id="D98517BA6F17967E88B1C606804C5E96" box="[1279,1377,1916,1942]" name="Vietnam" pageId="1" pageNumber="156">Vietnam</collectingCountry>
, from which it differs mainly by its leaf lamina oblanceolate to narrowly elliptic (
<emphasis id="93E68B386F17967E8F86C6DB86F25EBA" box="[968,991,1953,1978]" italics="true" pageId="1" pageNumber="156">vs</emphasis>
. ovate to lanceolate-ovate), with truncate to shallowly cordate base (
<emphasis id="93E68B386F17967E8DF7C6BF84FD5EDE" box="[441,464,1989,2014]" italics="true" pageId="1" pageNumber="156">vs</emphasis>
. deeply cordate) and pinnate veins (
<emphasis id="93E68B386F17967E8F20C6BF86A85EDE" box="[878,901,1989,2014]" italics="true" pageId="1" pageNumber="156">vs</emphasis>
. palmate); its perianth sparsely brown hirsute to glabrescent (
<emphasis id="93E68B386F17967E8D57C693841D5102" box="[281,304,2025,2050]" italics="true" pageId="1" pageNumber="156">vs</emphasis>
. densely brown hirsute), with the inner surface of utricle uniformly purple (
<emphasis id="93E68B386F17967E88DDC69381875102" box="[1171,1194,2025,2050]" italics="true" pageId="1" pageNumber="156">vs</emphasis>
. upper half cream and lower half pinkish-purple), and the limb lobes indistinct, straight and strongly inflated (
<emphasis id="93E68B386F17967E881AC97781465126" box="[1108,1131,2061,2086]" italics="true" pageId="1" pageNumber="156">vs</emphasis>
. distinct with two somewhat revolute and curved lower lobes, deeply sunken between them) with inner surface thoroughly densely covered by trichomes and warts (
<emphasis id="93E68B386F14967D8DCFC1B984B559DC" box="[385,408,195,220]" italics="true" pageId="2" pageNumber="157">vs</emphasis>
. the lower third densely covered by trichomes and the upper two-thirds smooth).
</paragraph>
</subSubSection>
<caption id="F5ED07A26F14967D8CC6C6A280075112" ID-DOI="http://doi.org/10.5281/zenodo.7797544" ID-Zenodo-Dep="7797544" httpUri="https://zenodo.org/record/7797544/files/figure.png" pageId="2" pageNumber="157" startId="2.[136,229,2008,2030]" targetBox="[179,1408,242,1981]" targetPageId="2">
<paragraph id="A12D572A6F14967D8CC6C6A280075112" blockId="2.[136,1451,2008,2066]" pageId="2" pageNumber="157">
<emphasis id="93E68B386F14967D8CC6C6A285D45EED" bold="true" box="[136,249,2008,2030]" pageId="2" pageNumber="157">FIGURE 1</emphasis>
.
<taxonomicName id="66922CA96F14967D8D4BC6A2873F5EEE" authority="T.V.Do" authorityName="T. V. Do. Until" authorityYear="2023" box="[261,530,2008,2030]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="2" pageNumber="157" phylum="Tracheophyta" rank="species" species="laotica" status="sp. nov.">
<emphasis id="93E68B386F14967D8D4BC6A284EB5EED" box="[261,454,2008,2029]" italics="true" pageId="2" pageNumber="157">Aristolochia laotica</emphasis>
T.V.Do
</taxonomicName>
,
<emphasis id="93E68B386F14967D8E50C6A3874C5EEE" box="[542,609,2009,2030]" italics="true" pageId="2" pageNumber="157">
<taxonomicNameLabel id="88D536436F14967D8E50C6A3874C5EEE" box="[542,609,2009,2030]" pageId="2" pageNumber="157" rank="species">sp.nov.</taxonomicNameLabel>
</emphasis>
<emphasis id="93E68B386F14967D8E28C6A2875A5EED" bold="true" box="[614,631,2008,2029]" pageId="2" pageNumber="157">A</emphasis>
. Habitat;
<emphasis id="93E68B386F14967D8E96C6A387C55EEE" bold="true" box="[728,744,2009,2030]" pageId="2" pageNumber="157">B</emphasis>
. Mature stems;
<emphasis id="93E68B386F14967D8FC9C6A286B55EEE" bold="true" box="[903,920,2008,2030]" pageId="2" pageNumber="157">C</emphasis>
. A branch bearing leaves;
<emphasis id="93E68B386F14967D88D1C6A3819D5EEE" bold="true" box="[1183,1200,2009,2030]" pageId="2" pageNumber="157">D</emphasis>
. Adaxial and abaxial leaf surface;
<emphasis id="93E68B386F14967D8C94C68785C75112" bold="true" box="[218,234,2045,2066]" pageId="2" pageNumber="157">E</emphasis>
. 2-flowered cyme on old woody stems;
<emphasis id="93E68B386F14967D8E23C68787515112" bold="true" box="[621,636,2045,2066]" pageId="2" pageNumber="157">F</emphasis>
. Two 1-flowered cymes on old woody stems. Photo credits, M. Forbes.
</paragraph>
</caption>
<caption id="F5ED07A26F15967C8CC6C745819E5F9D" ID-DOI="http://doi.org/10.5281/zenodo.7797548" ID-Zenodo-Dep="7797548" httpUri="https://zenodo.org/record/7797548/files/figure.png" pageId="3" pageNumber="158" startId="3.[136,229,1599,1621]" targetBox="[151,1436,190,1575]" targetPageId="3">
<paragraph id="A12D572A6F15967C8CC6C745819E5F9D" blockId="3.[136,1451,1599,1693]" pageId="3" pageNumber="158">
<emphasis id="93E68B386F15967C8CC6C74585D95F54" bold="true" box="[136,244,1599,1621]" pageId="3" pageNumber="158">FIGURE 2</emphasis>
.
<taxonomicName id="66922CA96F15967C8CB2C74584D35F55" authority="T.V.Do" authorityName="T. V. Do. Until" authorityYear="2023" box="[252,510,1599,1621]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="3" pageNumber="158" phylum="Tracheophyta" rank="species" species="laotica" status="sp. nov.">
<emphasis id="93E68B386F15967C8CB2C74584955F54" box="[252,440,1599,1620]" italics="true" pageId="3" pageNumber="158">Aristolochia laotica</emphasis>
T.V.Do
</taxonomicName>
,
<emphasis id="93E68B386F15967C8E44C73A87605F55" box="[522,589,1600,1621]" italics="true" pageId="3" pageNumber="158">
<taxonomicNameLabel id="88D536436F15967C8E44C73A87605F55" box="[522,589,1600,1621]" pageId="3" pageNumber="158" rank="species">sp.nov.</taxonomicNameLabel>
</emphasis>
<emphasis id="93E68B386F15967C8E01C745874D5F54" bold="true" box="[591,608,1599,1620]" pageId="3" pageNumber="158">A</emphasis>
.Leaves;
<emphasis id="93E68B386F15967C8EF7C73A87E45F55" bold="true" box="[697,713,1600,1621]" pageId="3" pageNumber="158">B</emphasis>
.Inner surface of limb and annulus(indicated by a green arrow);
<emphasis id="93E68B386F15967C895CC745800E5F55" bold="true" box="[1298,1315,1599,1621]" pageId="3" pageNumber="158">C</emphasis>
. Longitudinal section of perianth;
<emphasis id="93E68B386F15967C8D00C71E84725F79" bold="true" box="[334,351,1636,1657]" pageId="3" pageNumber="158">D</emphasis>
. Lateral view of perianth;
<emphasis id="93E68B386F15967C8E22C71E87515F79" bold="true" box="[620,636,1636,1657]" pageId="3" pageNumber="158">E</emphasis>
. Dorsal view of perianth;
<emphasis id="93E68B386F15967C8FCBC71E86B95F79" bold="true" box="[901,916,1636,1657]" pageId="3" pageNumber="158">F</emphasis>
. Ventral view of perianth
<emphasis id="93E68B386F15967C88D0C719819C5F79" bold="true" box="[1182,1201,1635,1657]" pageId="3" pageNumber="158">G</emphasis>
. Top and frontal view of perianth;
<emphasis id="93E68B386F15967C8CADC7F285DB5F9D" bold="true" box="[227,246,1672,1693]" pageId="3" pageNumber="158">H</emphasis>
. Lateral view of gynostemium;
<emphasis id="93E68B386F15967C8E64C7F2871E5F9D" bold="true" box="[554,563,1672,1693]" pageId="3" pageNumber="158">I</emphasis>
. Top view of gynostemium;
<emphasis id="93E68B386F15967C8F06C7F286795F9D" bold="true" box="[840,852,1672,1693]" pageId="3" pageNumber="158">J</emphasis>
. Capsule. Photo credits, M. Forbes.
</paragraph>
</caption>
<subSubSection id="E98804A16F15967C8CF3C7B680075E0A" pageId="3" pageNumber="158" type="materials_examined">
<paragraph id="A12D572A6F15967C8CF3C7B680075E0A" blockId="3.[136,1452,1740,2091]" pageId="3" pageNumber="158">
<emphasis id="93E68B386F15967C8CF3C7B6842C5FE6" bold="true" box="[189,257,1740,1766]" pageId="3" pageNumber="158">Type:</emphasis>
<materialsCitation id="11FA5D776F15967C8D51C7B680075E0A" ID-GBIF-Occurrence="4071465301" collectingDate="2022-03-27" country="Laos" elevation="1193" latitude="19.747055" location="Phou Koud district" longLatPrecision="1" longitude="103.245995" pageId="3" pageNumber="158" specimenCount="1" stateProvince="Xiangkhouang" typeStatus="holotype">
<collectingCountry id="D98517BA6F15967C8D51C7B684475FE6" box="[287,362,1740,1766]" name="Laos" pageId="3" pageNumber="158">LAOS</collectingCountry>
.
<collectingRegion id="635699C86F15967C8D38C7B687BA5FE6" box="[374,663,1740,1766]" country="Laos" name="Xiangkhouang" pageId="3" pageNumber="158">Xieng Khouang province</collectingRegion>
:
<location id="A44D01F16F15967C8EEDC7B686505FE6" LSID="urn:lsid:plazi:treatment:293BE63C6F17967B8CC6C64E878E5E9D:A44D01F16F15967C8EEDC7B686505FE6" box="[675,893,1740,1766]" country="Laos" latitude="19.747055" longLatPrecision="1" longitude="103.245995" name="Phou Koud district" pageId="3" pageNumber="158" stateProvince="Xiangkhouang">Phou Koud district</location>
, elev.
<quantity id="666AFACF6F15967C8F8BC7B681315FE6" box="[965,1052,1740,1766]" metricMagnitude="3" metricUnit="m" metricValue="1.193" pageId="3" pageNumber="158" unit="m" value="1193.0">
<elevation id="2ABFB0196F15967C8F8BC7B681315FE6" box="[965,1052,1740,1766]" metricMagnitude="3" metricUnit="m" metricValue="1.193" pageId="3" pageNumber="158" unit="m" value="1193.0">1193 m</elevation>
</quantity>
,
<geoCoordinate id="C4A631ED6F15967C8864C7B681E75FE6" box="[1066,1226,1740,1766]" degrees="19" direction="north" minutes="44" orientation="latitude" pageId="3" pageNumber="158" precision="1" seconds="49.4" value="19.747055">19°4449.4“N</geoCoordinate>
,
<geoCoordinate id="C4A631ED6F15967C8899C7B680AF5FE7" box="[1239,1410,1740,1767]" degrees="103" direction="east" minutes="14" orientation="longitude" pageId="3" pageNumber="158" precision="1" seconds="45.6" value="103.245995">103°1445.6“E</geoCoordinate>
,
<date id="D52C71EA6F15967C89C1C7B6843D5E0A" pageId="3" pageNumber="158" value="2022-03-27">
<collectingDate id="C56888026F15967C89C1C7B6843D5E0A" pageId="3" pageNumber="158" value="2022-03-27">27 March 2022</collectingDate>
</date>
(fl, fr),
<emphasis id="93E68B386F15967C8D24C78A87B75E0A" box="[362,666,1776,1802]" italics="true" pageId="3" pageNumber="158">Forbes and Oudomsouk 01</emphasis>
(
<typeStatus id="7E29E9886F15967C8EE6C78A86215E0A" box="[680,780,1776,1802]" pageId="3" pageNumber="158" type="holotype">holotype</typeStatus>
FOF [FOF0005199]!, isotypes: FOF!, VNMN!)
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="E98804A16F15967B8CF3C66E84685BB0" lastPageId="4" lastPageNumber="159" pageId="3" pageNumber="158" type="description">
<paragraph id="A12D572A6F15967B8CF3C66E84685BB0" blockId="3.[136,1452,1740,2091]" lastBlockId="4.[136,1452,158,1949]" lastPageId="4" lastPageNumber="159" pageId="3" pageNumber="158">
Woody lianas reaching the canopy, more than
<quantity id="666AFACF6F15967C8EF8C66E87C05E2E" box="[694,749,1812,1838]" metricMagnitude="1" metricUnit="m" metricValue="1.0" pageId="3" pageNumber="158" unit="m" value="10.0">10 m</quantity>
high. Stems terete, young branches slender, straight, pubescent, turning to deeply furrowed corky bark when mature, internodes
<quantity id="666AFACF6F15967C8F08C64286BA5E52" box="[838,919,1848,1875]" metricMagnitude="-2" metricUnit="m" metricValue="4.0" metricValueMax="5.0" metricValueMin="3.0" pageId="3" pageNumber="158" unit="cm" value="4.0" valueMax="5.0" valueMin="3.0">35 cm</quantity>
long. Leaves crowded near the distal portions of the branches. Petiole
<quantity id="666AFACF6F15967C8D3AC62684DD5E76" box="[372,496,1884,1910]" metricMagnitude="-2" metricUnit="m" metricValue="2.45" metricValueMax="2.7" metricValueMin="2.2" pageId="3" pageNumber="158" unit="cm" value="2.45" valueMax="2.7" valueMin="2.2">2.22.7 cm</quantity>
long, slender, straight, pubescent; leaf lamina oblanceolate to narrowly elliptic, 1418 ×
<quantity id="666AFACF6F15967C8CD1C6FA84325E9A" box="[159,287,1920,1947]" metricMagnitude="-2" metricUnit="m" metricValue="4.0" metricValueMax="4.5" metricValueMin="3.5" pageId="3" pageNumber="158" unit="cm" value="4.0" valueMax="4.5" valueMin="3.5">3.54.5 cm</quantity>
, papery, base truncate to shallowly cordate, apex acute, the adaxial surface dark green and glabrous, the abaxial surface puberulous, veins pinnate, eight to ten pairs, higher order venation reticulate, flattened on the adaxial surface, prominent on the abaxial surface, margin entire. Inflorescences 12-flowered cymes, formed on old woody stems, solitary or in a cluster of two-three cymes. Inflorescence axis
<quantity id="666AFACF6F15967C8FC8C69686C05106" box="[902,1005,2028,2055]" metricMagnitude="-2" metricUnit="m" metricValue="1.75" metricValueMax="2.0" metricValueMin="1.5" pageId="3" pageNumber="158" unit="cm" value="1.75" valueMax="2.0" valueMin="1.5">1.52 cm</quantity>
long, straight, purplish-brown, sparsely villous to glabrescent. Bracteoles clasping, subulate, 1.51.8 ×
<quantity id="666AFACF6F15967C8F09C96A8697512A" box="[839,954,2064,2090]" metricMagnitude="-3" metricUnit="m" metricValue="1.1" metricValueMax="1.2" metricValueMin="1.0" pageId="3" pageNumber="158" unit="mm" value="1.1" valueMax="1.2" valueMin="1.0">11.2 mm</quantity>
, sessile, caducous, densely brown pubescent on both sides. Pedicel 2.23.0 cm long, straight, sparsely villous to pubescent. Ovary narrowly cylindric,
<quantity id="666AFACF6F12967B8963C1E4808659B9" box="[1325,1451,158,185]" metricMagnitude="-2" metricUnit="m" metricValue="2.35" metricValueMax="2.5" metricValueMin="2.2" pageId="4" pageNumber="159" unit="cm" value="2.35" valueMax="2.5" valueMin="2.2">2.22.5 cm</quantity>
long,
<quantity id="666AFACF6F12967B8C86C1B8846859DD" box="[200,325,194,221]" metricMagnitude="-3" metricUnit="m" metricValue="5.0" metricValueMax="6.0" metricValueMin="4.0" pageId="4" pageNumber="159" unit="cm" value="0.5" valueMax="0.6" valueMin="0.4">0.40.6 cm</quantity>
in diam., densely brown villous. Perianth horseshoe-shaped (in side view), 4.55.0 cm long, outside uniformly purple, sparsely brown hirsute to glabrescent, with conspicuous parallel veins or dots; utricle indistinct from the tube, oblong-ovate, inflated,
<quantity id="666AFACF6F12967B8E74C07087955825" box="[570,696,266,293]" metricMagnitude="-2" metricUnit="m" metricValue="1.2999999999999998" metricValueMax="1.4" metricValueMin="1.2" pageId="4" pageNumber="159" unit="cm" value="1.2999999999999998" valueMax="1.4" valueMin="1.2">1.21.4 cm</quantity>
long,
<quantity id="666AFACF6F12967B8F4CC07086415825" box="[770,876,266,293]" metricMagnitude="-3" metricUnit="m" metricValue="9.0" metricValueMax="10.0" metricValueMin="8.0" pageId="4" pageNumber="159" unit="cm" value="0.9" valueMax="1.0" valueMin="0.8">0.81 cm</quantity>
in diam., inside with a uniformly purple band and densely pubescent; tube horseshoe-shaped, folded upwards at its middle; lower part of tube strongly inflated,
<quantity id="666AFACF6F12967B8922C0548587586D" metricMagnitude="-2" metricUnit="m" metricValue="1.2" metricValueMax="1.4" metricValueMin="1.0" pageId="4" pageNumber="159" unit="cm" value="1.2" valueMax="1.4" valueMin="1.0">11.4 cm</quantity>
in diam., inner surface dark-purple, smooth, upper part of tube cylindrical, slightly constricted and narrower than the lower portion and the utricle,
<quantity id="666AFACF6F12967B8E4DC00C87AC5891" box="[515,641,374,401]" metricMagnitude="-2" metricUnit="m" metricValue="1.65" metricValueMax="1.8" metricValueMin="1.5" pageId="4" pageNumber="159" unit="cm" value="1.65" valueMax="1.8" valueMin="1.5">1.51.8 cm</quantity>
long,
<quantity id="666AFACF6F12967B8E87C00C866A5891" box="[713,839,374,401]" metricMagnitude="-3" metricUnit="m" metricValue="7.5" metricValueMax="8.0" metricValueMin="7.0" pageId="4" pageNumber="159" unit="cm" value="0.75" valueMax="0.8" valueMin="0.7">0.70.8 cm</quantity>
in diam., inner surface purple, smooth; limb cylindric or saccate-shaped, strongly inflated, much larger than the utricle and tube,
<quantity id="666AFACF6F12967B8F86C0E0813758B5" box="[968,1050,410,437]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" metricValueMax="7.0" metricValueMin="5.0" pageId="4" pageNumber="159" unit="cm" value="6.0" valueMax="7.0" valueMin="5.0">57 cm</quantity>
long,
<quantity id="666AFACF6F12967B882EC0E081F058B5" box="[1120,1245,410,437]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" metricValueMax="3.2" metricValueMin="2.8" pageId="4" pageNumber="159" unit="cm" value="3.0" valueMax="3.2" valueMin="2.8">2.83.2 cm</quantity>
diam., constricted at base and apex, forming a right angle with the upper tube, the three lobes indistinct and slightly asymmetric, almost connate, constricted at apex, entirely inside covered with dense trichomes and warts; annulus present, dark-purple,
<quantity id="666AFACF6F12967B8CC6C37C842A5B21" box="[136,263,518,545]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" metricValueMax="1.1" metricValueMin="0.9" pageId="4" pageNumber="159" unit="cm" value="1.0" valueMax="1.1" valueMin="0.9">0.91.1 cm</quantity>
diam.; throat dark-purple. Gynostemium 3-lobed, cylindrical, cream,
<quantity id="666AFACF6F12967B8869C37C81B95B21" box="[1063,1172,518,545]" metricMagnitude="-3" metricUnit="m" metricValue="9.0" metricValueMax="10.0" metricValueMin="8.0" pageId="4" pageNumber="159" unit="mm" value="9.0" valueMax="10.0" valueMin="8.0">810 mm</quantity>
long,
<quantity id="666AFACF6F12967B8891C37C80135B21" box="[1247,1342,518,545]" metricMagnitude="-3" metricUnit="m" metricValue="7.5" metricValueMax="8.0" metricValueMin="7.0" pageId="4" pageNumber="159" unit="mm" value="7.5" valueMax="8.0" valueMin="7.0">78 mm</quantity>
in diam., lobes acute; anthers oblong,
<quantity id="666AFACF6F12967B8D89C350870E5B45" box="[455,547,554,581]" metricMagnitude="-3" metricUnit="m" metricValue="5.5" metricValueMax="6.0" metricValueMin="5.0" pageId="4" pageNumber="159" unit="mm" value="5.5" valueMax="6.0" valueMin="5.0">56 mm</quantity>
long,
<quantity id="666AFACF6F12967B8E27C35087925B45" box="[617,703,554,581]" metricMagnitude="-4" metricUnit="m" metricValue="5.0" pageId="4" pageNumber="159" unit="mm" value="0.5">0.5 mm</quantity>
wide, yellow. Capsule cylindrical,
<quantity id="666AFACF6F12967B8806C35081B65B45" box="[1096,1179,554,581]" metricMagnitude="-2" metricUnit="m" metricValue="7.0" metricValueMax="8.0" metricValueMin="6.0" pageId="4" pageNumber="159" unit="cm" value="7.0" valueMax="8.0" valueMin="6.0">68 cm</quantity>
long,
<quantity id="666AFACF6F12967B88AFC35080645B45" box="[1249,1353,554,581]" metricMagnitude="-2" metricUnit="m" metricValue="2.25" metricValueMax="2.5" metricValueMin="2.0" pageId="4" pageNumber="159" unit="cm" value="2.25" valueMax="2.5" valueMin="2.0">22.5 cm</quantity>
in diam, 6-ridged, greenish-brown, glabrescent, basipetally dehiscent. Seeds ovoid,
<quantity id="666AFACF6F12967B8F88C334810F5B69" box="[966,1058,590,617]" metricMagnitude="-3" metricUnit="m" metricValue="7.5" metricValueMax="8.0" metricValueMin="7.0" pageId="4" pageNumber="159" unit="mm" value="7.5" valueMax="8.0" valueMin="7.0">78 mm</quantity>
long,
<quantity id="666AFACF6F12967B8828C33481EF5B69" box="[1126,1218,590,617]" metricMagnitude="-3" metricUnit="m" metricValue="5.5" metricValueMax="6.0" metricValueMin="5.0" pageId="4" pageNumber="159" unit="mm" value="5.5" valueMax="6.0" valueMin="5.0">56 mm</quantity>
in diam, not winged, the adaxial surface deeply concave with a prominent, central, longitudinal, funiculus, the abaxial surface convex, both surfaces smooth.
</paragraph>
</subSubSection>
<subSubSection id="E98804A16F12967B8CF3C3C080265BF8" pageId="4" pageNumber="159" type="etymology">
<paragraph id="A12D572A6F12967B8CF3C3C0806A5BD4" blockId="4.[136,1452,158,1949]" box="[189,1351,698,725]" pageId="4" pageNumber="159">
<emphasis id="93E68B386F12967B8CF3C3C084655BD4" bold="true" box="[189,328,698,724]" pageId="4" pageNumber="159">Etymology:</emphasis>
—The specific epithet is derived from the country,
<collectingCountry id="D98517BA6F12967B8FCBC3C186935BD5" box="[901,958,699,725]" name="Laos" pageId="4" pageNumber="159">Laos</collectingCountry>
, where the new species was found.
</paragraph>
<paragraph id="A12D572A6F12967B8CF3C3A480265BF8" blockId="4.[136,1452,158,1949]" box="[189,1291,734,761]" pageId="4" pageNumber="159">
<emphasis id="93E68B386F12967B8CF3C3A4846E5BF8" bold="true" box="[189,323,734,760]" pageId="4" pageNumber="159">Phenology:</emphasis>
—Flowering was observed from February to March, and fruiting from March to April.
</paragraph>
</subSubSection>
<subSubSection id="E98804A16F12967B8CF3C27881965A65" pageId="4" pageNumber="159" type="distribution">
<paragraph id="A12D572A6F12967B8CF3C27881965A65" blockId="4.[136,1452,158,1949]" pageId="4" pageNumber="159">
<emphasis id="93E68B386F12967B8CF3C27884C05A1C" bold="true" box="[189,493,770,796]" pageId="4" pageNumber="159">Distribution and ecology:</emphasis>
—The new species is currently known only from Phou Koud district,
<collectingRegion id="635699C86F12967B88B7C27885C05A40" country="Laos" name="Xiangkhouang" pageId="4" pageNumber="159">Xieng Khouang province</collectingRegion>
, Northeastern
<collectingCountry id="D98517BA6F12967B8DC1C25D84E45A41" box="[399,457,807,833]" name="Laos" pageId="4" pageNumber="159">Laos</collectingCountry>
. The new species grows in moist and wet soils, and alongstream banks with very smooth and steep walls in subtropical broad-leaved evergreen forests, at elevations of ca.
<quantity id="666AFACF6F12967B8854C230819A5A65" box="[1050,1207,842,869]" metricMagnitude="3" metricUnit="m" metricValue="1.175" metricValueMax="1.25" metricValueMin="1.1" pageId="4" pageNumber="159" unit="m" value="1175.0" valueMax="1250.0" valueMin="1100.0">11001250 m</quantity>
.
</paragraph>
</subSubSection>
<subSubSection id="E98804A16F12967B8CF3C214814B5D60" pageId="4" pageNumber="159" type="conservation">
<paragraph id="A12D572A6F12967B8CF3C214814B5D60" blockId="4.[136,1452,158,1949]" pageId="4" pageNumber="159">
<emphasis id="93E68B386F12967B8CF3C214849A5A88" bold="true" box="[189,439,878,904]" pageId="4" pageNumber="159">Conservation status:</emphasis>
—At least three small-sized populations of
<taxonomicName id="66922CA96F12967B8FE1C21481BC5A88" authorityName="T. V. Do. Until" authorityYear="2023" box="[943,1169,878,904]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="laotica">
<emphasis id="93E68B386F12967B8FE1C21481BC5A88" box="[943,1169,878,904]" italics="true" pageId="4" pageNumber="159">Aristolochia laotica</emphasis>
</taxonomicName>
were found in the spirit forest areas in Phou Koud district,
<collectingRegion id="635699C86F12967B8E55C2E886135AAC" box="[539,830,914,940]" country="Laos" name="Xiangkhouang" pageId="4" pageNumber="159">Xieng Khouang province</collectingRegion>
, Northeastern
<collectingCountry id="D98517BA6F12967B8FABC2E981325AAD" box="[997,1055,915,941]" name="Laos" pageId="4" pageNumber="159">Laos</collectingCountry>
. The first population is distributed in an area of less than
<quantity id="666AFACF6F12967B8DC7C2CC84EE5AD0" box="[393,451,950,976]" metricMagnitude="3" metricUnit="m" metricValue="8.0" pageId="4" pageNumber="159" unit="km" value="8.0">8 km</quantity>
<superScript id="56E7FA626F12967B8D8DC2CC84E65AC4" attach="left" box="[451,459,950,964]" fontSize="6" pageId="4" pageNumber="159">2</superScript>
, the second in an area of less than
<quantity id="666AFACF6F12967B8F12C2CC86895AD0" box="[860,932,950,977]" metricMagnitude="4" metricUnit="m" metricValue="1.5" pageId="4" pageNumber="159" unit="km" value="15.0">15 km</quantity>
<superScript id="56E7FA626F12967B8FEAC2CC86815AC4" attach="left" box="[932,940,950,964]" fontSize="6" pageId="4" pageNumber="159">2</superScript>
, and the third in an area of less than
<quantity id="666AFACF6F12967B891AC2CC80B15AD0" box="[1364,1436,950,976]" metricMagnitude="4" metricUnit="m" metricValue="1.2" pageId="4" pageNumber="159" unit="km" value="12.0">12 km</quantity>
<superScript id="56E7FA626F12967B89D2C2CC80895AC4" attach="left" box="[1436,1444,950,964]" fontSize="6" pageId="4" pageNumber="159">2</superScript>
. Estimated from the locations of these three populations, the Extent of Occurrence (EOO) is ca.
<quantity id="666AFACF6F12967B88F5C2A0803C5AF4" box="[1211,1297,986,1012]" metricMagnitude="5" metricUnit="m" metricValue="6.0" pageId="4" pageNumber="159" unit="km" value="600.0">600 km</quantity>
<superScript id="56E7FA626F12967B895EC2A080355AE8" attach="left" box="[1296,1304,986,1000]" fontSize="6" pageId="4" pageNumber="159">2</superScript>
and the Area of Occupancy (AOO) is ca.
<quantity id="666AFACF6F12967B8D9EC28487375D18" box="[464,538,1022,1049]" metricMagnitude="4" metricUnit="m" metricValue="3.5" pageId="4" pageNumber="159" unit="km" value="35.0">35 km</quantity>
<superScript id="56E7FA626F12967B8E54C284870F5D0C" attach="left" box="[538,546,1022,1036]" fontSize="6" pageId="4" pageNumber="159">2</superScript>
. Furthermore, the habitats have been impacted by human activities, especially agricultural extension. Given this situation, the new species is provisionally assessed as Endangered (EN) (B1 + B2ab(iii, iv)), following the IUCN Red List Categories and Criteria (
<bibRefCitation id="C5032ADB6F12967B8FC4C53C813F5D60" author="IUCN" box="[906,1042,1094,1120]" pageId="4" pageNumber="159" refId="ref4944" refString="IUCN (2012) IUCN Red List Categories and Criteria, Version 3. 1 (2 ndEd.) Gland and Cambridge, 32 pp." type="book" year="2012">IUCN 2012</bibRefCitation>
,
<bibRefCitation id="C5032ADB6F12967B8853C53C81775D60" author="IUCN Standards &amp; Petitions Subcommittee" box="[1053,1114,1094,1120]" pageId="4" pageNumber="159" refId="ref4971" refString="IUCN Standards and Petitions Subcommittee (2019) Guidelines for Using the IUCN Red List Categories and Criteria, Version 14. Prepared by the Standards and Petitions Subcommittee. Available from: https: // www. iucnredlist. org / resources / redlistguidelines (accessed 28 December 2020)" type="url" year="2019">2019</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="E98804A16F12967B8CF3C510878E5E9D" pageId="4" pageNumber="159" type="discussion">
<paragraph id="A12D572A6F12967B8CF3C510873A5F34" blockId="4.[136,1452,158,1949]" pageId="4" pageNumber="159">
<emphasis id="93E68B386F12967B8CF3C51084245D84" bold="true" box="[189,265,1130,1156]" pageId="4" pageNumber="159">Notes:</emphasis>
<taxonomicName id="66922CA96F12967B8D68C510872F5D84" authorityName="T. V. Do. Until" authorityYear="2023" box="[294,514,1130,1156]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="laotica">
<emphasis id="93E68B386F12967B8D68C510872F5D84" box="[294,514,1130,1156]" italics="true" pageId="4" pageNumber="159">Aristolochia laotica</emphasis>
</taxonomicName>
is morphologically similar to some species of
<emphasis id="93E68B386F12967B8FB6C511813C5D85" box="[1016,1041,1131,1157]" italics="true" pageId="4" pageNumber="159">A.</emphasis>
subgen.
<taxonomicName id="66922CA96F12967B883EC51081E75D84" authorityName="Schmidt" authorityYear="1935" baseAuthorityName="Duch." baseAuthorityYear="1854" box="[1136,1226,1130,1156]" class="Magnoliopsida" family="Aristolochiaceae" genus="Siphisia" higherTaxonomySource="GBIF" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="genus">
<emphasis id="93E68B386F12967B883EC51081E75D84" box="[1136,1226,1130,1156]" italics="true" pageId="4" pageNumber="159">Siphisia</emphasis>
</taxonomicName>
such as
<taxonomicName id="66922CA96F12967B896CC51184815DA8" authority="J. D. Hooker (1856: 4918)" authorityName="J. D. Hooker" authorityPageNumber="4918" authorityYear="1856" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="thwaitesii">
<emphasis id="93E68B386F12967B896CC51180865D84" box="[1314,1451,1130,1157]" italics="true" pageId="4" pageNumber="159">A. thwaitesii</emphasis>
J.D.
<bibRefCitation id="C5032ADB6F12967B8CE0C5F484815DA8" author="Hooker, W. J." box="[174,428,1166,1193]" pageId="4" pageNumber="159" pagination="4918" refId="ref4725" refString="Hooker, W. J. (1856) Curtis's Botanical Magazine, comprising the plants of the Royal Gardens of Kew and other botanical establishments in Great Britain, with suitable description, vol. 82: Tab., 4918." type="book chapter" year="1856">Hooker (1856: 4918)</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8DF2C5F586555DA9" authority="C. F. Liang (1975: 15)" authorityName="C. F. Liang" authorityPageNumber="15" authorityYear="1975" box="[444,888,1166,1193]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="cucurbitoides">
<emphasis id="93E68B386F12967B8DF2C5F5875A5DA8" box="[444,631,1166,1193]" italics="true" pageId="4" pageNumber="159">A. cucurbitoides</emphasis>
C.F.
<bibRefCitation id="C5032ADB6F12967B8EE2C5F486555DA9" author="Liang, C. F." box="[684,888,1166,1193]" pageId="4" pageNumber="159" pagination="10 - 28" refId="ref5135" refString="Liang, C. F. (1975) The Aristolochiaceae of Kwangsi Flora. Acta Phytotaxonomica Sinica 13 (2): 10 - 28. [in Chinese]" type="journal article" year="1975">Liang (1975: 15)</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8FC6C5F584B15DCC" authority="(Chatterjee 1948: 64) C. Y. Wu ex S. M. Hwang (1981: 231)" authorityName="S. M. Hwang" authorityPageNumber="231" authorityYear="1981" baseAuthorityName="Chatterjee" baseAuthorityPageNumber="64" baseAuthorityYear="1948" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="transeccta">
<emphasis id="93E68B386F12967B8FC6C5F5810D5DA8" box="[904,1056,1167,1193]" italics="true" pageId="4" pageNumber="159">A. transeccta</emphasis>
(Chatterjee 1948: 64) C.Y.Wu ex S.M.
<bibRefCitation id="C5032ADB6F12967B8CF6C5C884B15DCC" author="Hwang, S. M." box="[184,412,1202,1228]" pageId="4" pageNumber="159" pagination="222 - 231" refId="ref4837" refString="Hwang, S. M. (1981) Materials for Chinese Aristolochia. Acta Phytotaxonomica Sinica 19 (2): 222 - 231. [in Chinese]" type="journal article" year="1981">Hwang (1981: 231)</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8DE6C5C9867E5DCC" authority="S. M. Hwang (1981: 228)" authorityName="S. M. Hwang" authorityPageNumber="228" authorityYear="1981" box="[424,851,1202,1229]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="utriformis">
<emphasis id="93E68B386F12967B8DE6C5C9871A5DCC" box="[424,567,1202,1229]" italics="true" pageId="4" pageNumber="159">A. utriformis</emphasis>
S.M.
<bibRefCitation id="C5032ADB6F12967B8E21C5C8867E5DCC" author="Hwang, S. M." box="[623,851,1202,1228]" pageId="4" pageNumber="159" pagination="222 - 231" refId="ref4837" refString="Hwang, S. M. (1981) Materials for Chinese Aristolochia. Acta Phytotaxonomica Sinica 19 (2): 222 - 231. [in Chinese]" type="journal article" year="1981">Hwang (1981: 228)</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8F11C5C980285DCC" authority="S. M. Hwang (1981: 226)" authorityName="S. M. Hwang" authorityPageNumber="226" authorityYear="1981" box="[863,1285,1202,1229]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="ovatifolia">
<emphasis id="93E68B386F12967B8F11C5C986C45DCC" box="[863,1001,1202,1229]" italics="true" pageId="4" pageNumber="159">A. ovatifolia</emphasis>
S.M.
<bibRefCitation id="C5032ADB6F12967B886FC5C880285DCC" author="Hwang, S. M." box="[1057,1285,1202,1228]" pageId="4" pageNumber="159" pagination="222 - 231" refId="ref4837" refString="Hwang, S. M. (1981) Materials for Chinese Aristolochia. Acta Phytotaxonomica Sinica 19 (2): 222 - 231. [in Chinese]" type="journal article" year="1981">Hwang (1981: 226)</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B895FC5C984235DF0" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="forrestiana">
<emphasis id="93E68B386F12967B895FC5C980865DCC" box="[1297,1451,1202,1229]" italics="true" pageId="4" pageNumber="159">A. forrestiana</emphasis>
(1989: 321)
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8D57C5AD87AE5DF0" authority="S. J. Ma (1989: 348)" authorityName="S. J. Ma" authorityPageNumber="348" authorityYear="1989" box="[281,643,1238,1265]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="wardiana">
<emphasis id="93E68B386F12967B8D57C5AD848F5DF0" box="[281,418,1238,1265]" italics="true" pageId="4" pageNumber="159">A. wardiana</emphasis>
S.J.
<bibRefCitation id="C5032ADB6F12967B8D85C5AC87AE5DF0" author="Ma, J. S." box="[459,643,1238,1264]" pageId="4" pageNumber="159" pagination="321 - 364" refId="ref5227" refString="Ma, J. S. (1989) A revision of Aristolochia Linn. from E. &amp; S. Asia. Acta Phytotaxonomica Sinica 27: 321 - 364. [in Chinese]" type="journal article" year="1989">Ma (1989: 348)</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8EC1C5AD81EC5DF0" authority="X. X. Zhu &amp; J. S. Ma (2018: 298)" authorityName="X. X. Zhu &amp; J. S. Ma" authorityPageNumber="298" authorityYear="2018" box="[655,1217,1238,1265]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="melanocephala">
<emphasis id="93E68B386F12967B8EC1C5AD86745DF0" box="[655,857,1238,1265]" italics="true" pageId="4" pageNumber="159">A. melanocephala</emphasis>
X.X.Zhu &amp; J.S.Ma (2018: 298)
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8883C5AD84F35C14" authority="X. X. Zhu &amp; J. S. Ma (2019: 94)" authorityName="X. X. Zhu &amp; J. S. Ma" authorityPageNumber="94" authorityYear="2019" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="pseudoutriformis">
<emphasis id="93E68B386F12967B8883C5AD80865DF0" box="[1229,1451,1238,1265]" italics="true" pageId="4" pageNumber="159">A. pseudoutriformis</emphasis>
X.X.Zhu &amp; J.S.Ma (2019: 94)
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8DA5C581869D5C14" authority="X. X. Zhu &amp; J. S. Ma (2019: 98)" authorityName="X. X. Zhu &amp; J. S. Ma" authorityPageNumber="98" authorityYear="2019" box="[491,944,1274,1301]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="yangii">
<emphasis id="93E68B386F12967B8DA5C581877C5C14" box="[491,593,1275,1301]" italics="true" pageId="4" pageNumber="159">A. yangii</emphasis>
X.X.Zhu &amp; J.S.Ma (2019: 98)
</taxonomicName>
,
<taxonomicName id="66922CA96F12967B8FF2C58180645C14" authority="T. V. Do (2021: 41)" authorityName="T. V. Do" authorityPageNumber="41" authorityYear="2021" box="[956,1353,1274,1301]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="vuquangensis">
<emphasis id="93E68B386F12967B8FF2C58181595C14" box="[956,1140,1275,1301]" italics="true" pageId="4" pageNumber="159">A. vuquangensis</emphasis>
T.V.
<bibRefCitation id="C5032ADB6F12967B88E6C58180645C14" author="Do, T. V. &amp; Nguyen, H. V. &amp; Le, K. D." box="[1192,1353,1274,1301]" pageId="4" pageNumber="159" pagination="37 - 44" refId="ref4336" refString="Do, T. V., Nguyen, H. V. &amp; Le, K. D. (2021) Aristolochia vuquangensis (Aristolochiaceae), a new species from Central Vietnam. Phytotaxa 500 (1): 37 - 44. https: // doi. org / 10.11646 / phytotaxa. 500.1.5" type="journal article" year="2021">Do (2021: 41)</bibRefCitation>
</taxonomicName>
and two recently described species under the segregate genus
<taxonomicName id="66922CA96F12967B8E99C46586175C38" box="[727,826,1311,1336]" class="Magnoliopsida" family="Aristolochiaceae" genus="Isotrema" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="genus">
<emphasis id="93E68B386F12967B8E99C46586175C38" box="[727,826,1311,1336]" italics="true" pageId="4" pageNumber="159">Isotrema</emphasis>
</taxonomicName>
(i.e.
<taxonomicName id="66922CA96F12967B8F3FC46585835C5C" authority="X. X. Zhu, Jun Wang &amp; F. Cao (2020: 16)" authorityName="X. X. Zhu, Jun Wang &amp; F. Cao" authorityPageNumber="16" authorityYear="2020" class="Magnoliopsida" family="Aristolochiaceae" genus="Isotrema" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="brevilimbum">
<emphasis id="93E68B386F12967B8F3FC46581385C38" box="[881,1045,1310,1336]" italics="true" pageId="4" pageNumber="159">I. brevilimbum</emphasis>
X.X.Zhu, Jun Wang &amp; F.Cao (2020: 16)
</taxonomicName>
and
<taxonomicName id="66922CA96F12967B8CAFC43986AB5C5C" authority="Luu, Q. B. Nguyen &amp; H. C. Nguyen (2022: 72)" authorityName="Luu, Q. B. Nguyen &amp; H. C. Nguyen" authorityPageNumber="72" authorityYear="2022" box="[225,902,1346,1373]" class="Magnoliopsida" family="Aristolochiaceae" genus="Isotrema" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="putalengense">
<emphasis id="93E68B386F12967B8CAFC43984A15C5C" box="[225,396,1346,1372]" italics="true" pageId="4" pageNumber="159">I. putalengense</emphasis>
Luu, Q.B.Nguyen &amp; H.C.
<bibRefCitation id="C5032ADB6F12967B8EE7C43886AB5C5C" author="Nguyen, Q. B. &amp; Nguyen, H. C. &amp; Tran, D. B. &amp; Nguyen, P. H. &amp; Luu, H. T." box="[681,902,1346,1372]" pageId="4" pageNumber="159" pagination="71 - 79" refId="ref5552" refString="Nguyen, Q. B., Nguyen, H. C., Tran, D. B., Nguyen, P. H. &amp; Luu, H. T. (2022) Isotrema putalengense, A new species of Aristolochiaceae from northern Vietnam and two new combinations in Isotrema. PhytoKeys 197: 71 - 79. https: // doi. org / 10.3897 / phytokeys. 197.73596" type="journal article" year="2022">Nguyen (2022: 72)</bibRefCitation>
</taxonomicName>
. They all have a cylindric or saccate-shaped limb. Among them, the new species shows its highest resemblance with
<emphasis id="93E68B386F12967B8FCCC41D816F5C80" box="[898,1090,1383,1409]" italics="true" pageId="4" pageNumber="159">
<taxonomicName id="66922CA96F12967B8FCCC41D81135C80" authorityName="T. V. Do" authorityYear="2021" box="[898,1086,1383,1409]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="vuquangensis">A. vuquangensis</taxonomicName>
,
</emphasis>
by having 12-flowered cymes exclusively on old woody stems and purple perianth with a horseshoe-shaped tube and a strongly inflated, asymmetric limb, much larger than the utricle and tube. However, it is easily distinguished from the latter by the leaf shape and venation, the perianth indumentum, the inner surface indumentum and color of the utricle, the shape and indumentum of the limb lobes, and the size of the annulus. Detailed comparisons of the new species and its similar species are shown in
<tableCitation id="EC1062916F12967B8CBAC760846A5F34" box="[244,327,1562,1588]" captionStart="TABLE 1" captionStartId="6.[136,229,157,183]" captionTargetPageId="6" captionText="TABLE 1. Comparison of morphological traits of Aristolochia laotica with A. vuquangensis." httpUri="http://table.plazi.org/id/F5ED07A26F1096798CC6C1E781B159B8" pageId="4" pageNumber="159" tableUuid="F5ED07A26F1096798CC6C1E781B159B8">Table 1</tableCitation>
and
<figureCitation id="39A94BAF6F12967B8D30C76084925F34" box="[382,447,1562,1588]" captionStart="FIGURE 3" captionStartId="5.[136,229,1877,1899]" captionTargetBox="[151,1436,191,1853]" captionTargetId="figure-17@5.[151,1436,190,1853]" captionTargetPageId="5" captionText="FIGURE 3. Comparison of morphological traits of Aristolochia laotica T.V.Do, sp.nov. with A. vuquangensis and A. versicolor. A D. Aristolochia laotica. A. Leaf shape; B. Lateral view of perianth; C. Longitudinal section of perianth; D. Ventral view of perianth. EH. A. vuquangensis. E. Leaf shape; F. Lateral view of perianth; G. Longitudinal section of perianth; H. Ventral view of perianth. I K. Aristolochia versicolor. I. Leaf shape; J. Longitudinal section of perianth; K. Frontal and dorsal view of perianth. Photo credits, AD, M. Forbes; EK, Do Van Truong." figureDoi="http://doi.org/10.5281/zenodo.7797550" httpUri="https://zenodo.org/record/7797550/files/figure.png" pageId="4" pageNumber="159">Fig. 3</figureCitation>
(AH).
</paragraph>
<paragraph id="A12D572A6F12967B8CF3C74486BF5E0C" blockId="4.[136,1452,158,1949]" pageId="4" pageNumber="159">
The new species is characterized by having an oblanceolate to narrowly elliptic leaf lamina with a shallowly cordate base and pinnate veins, which is similar to those of
<taxonomicName id="66922CA96F12967B8F64C71880665F7C" authority="S. M. Hwang (1981: 224)" authorityName="S. M. Hwang" authorityPageNumber="224" authorityYear="1981" box="[810,1355,1634,1660]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="species" species="versicolor">
<emphasis id="93E68B386F12967B8F64C71881035F7C" box="[810,1070,1634,1660]" italics="true" pageId="4" pageNumber="159">Aristolochia versicolor</emphasis>
S.M.
<bibRefCitation id="C5032ADB6F12967B8828C71880665F7C" author="Hwang, S. M." box="[1126,1355,1634,1660]" pageId="4" pageNumber="159" pagination="222 - 231" refId="ref4837" refString="Hwang, S. M. (1981) Materials for Chinese Aristolochia. Acta Phytotaxonomica Sinica 19 (2): 222 - 231. [in Chinese]" type="journal article" year="1981">Hwang (1981: 224)</bibRefCitation>
</taxonomicName>
, another species of
<taxonomicName id="66922CA96F12967B8CB2C7FC84AB5FA0" authorityName="Linnaeus" authorityYear="1753" box="[252,390,1670,1696]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="genus">
<emphasis id="93E68B386F12967B8CB2C7FC84AB5FA0" box="[252,390,1670,1696]" italics="true" pageId="4" pageNumber="159">Aristolochia</emphasis>
</taxonomicName>
subgenus
<taxonomicName id="66922CA96F12967B8DB4C7FC87795FA0" authorityName="Schmidt" authorityYear="1935" baseAuthorityName="Duch." baseAuthorityYear="1854" box="[506,596,1670,1696]" class="Magnoliopsida" family="Aristolochiaceae" genus="Siphisia" higherTaxonomySource="GBIF" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="genus">
<emphasis id="93E68B386F12967B8DB4C7FC87795FA0" box="[506,596,1670,1696]" italics="true" pageId="4" pageNumber="159">Siphisia</emphasis>
</taxonomicName>
, recently recorded for the flora of
<collectingCountry id="D98517BA6F12967B8F81C7FD81285FA1" box="[975,1029,1671,1697]" name="Laos" pageId="4" pageNumber="159">Laos</collectingCountry>
(
<bibRefCitation id="C5032ADB6F12967B885DC7FC81945FA0" author="Le, K. D. &amp; Do, T. V." box="[1043,1209,1670,1697]" pageId="4" pageNumber="159" pagination="159 - 163" refId="ref5022" refString="Le, K. D. &amp; Do, T. V. (2022) Two new records of Aristolochia (Aristolochiaceae) for the Flora of Lao PDR. Acta Phytotaxonomica et Geobotanica 73 (2): 159 - 163. https: // doi. org / 10.18942 / apg. 202118" type="journal article" year="2022">Le &amp; Do 2022</bibRefCitation>
). However, it is easily distinguished from the latter by some floral traits such as the shape of the limb (cylindric or saccate-shaped
<emphasis id="93E68B386F12967B8978C7D180605FC4" box="[1334,1357,1707,1732]" italics="true" pageId="4" pageNumber="159">vs</emphasis>
. discoid or nearly round), the indumentum of inner surface of limb lobes (densely covered by trichomes and warts
<emphasis id="93E68B386F12967B896AC7B580165FE8" box="[1316,1339,1743,1768]" italics="true" pageId="4" pageNumber="159">vs</emphasis>
. smooth), and the colour of the throat (dark-purple
<emphasis id="93E68B386F12967B8E1CC78987445E0C" box="[594,617,1779,1804]" italics="true" pageId="4" pageNumber="159">vs</emphasis>
. white) (
<figureCitation id="39A94BAF6F12967B8E80C78886AB5E0C" box="[718,902,1778,1804]" captionStart="FIGURE 3" captionStartId="5.[136,229,1877,1899]" captionTargetBox="[151,1436,191,1853]" captionTargetId="figure-17@5.[151,1436,190,1853]" captionTargetPageId="5" captionText="FIGURE 3. Comparison of morphological traits of Aristolochia laotica T.V.Do, sp.nov. with A. vuquangensis and A. versicolor. A D. Aristolochia laotica. A. Leaf shape; B. Lateral view of perianth; C. Longitudinal section of perianth; D. Ventral view of perianth. EH. A. vuquangensis. E. Leaf shape; F. Lateral view of perianth; G. Longitudinal section of perianth; H. Ventral view of perianth. I K. Aristolochia versicolor. I. Leaf shape; J. Longitudinal section of perianth; K. Frontal and dorsal view of perianth. Photo credits, AD, M. Forbes; EK, Do Van Truong." figureDoi="http://doi.org/10.5281/zenodo.7797550" httpUri="https://zenodo.org/record/7797550/files/figure.png" pageId="4" pageNumber="159">Fig. 3AD; IK</figureCitation>
).
</paragraph>
<paragraph id="A12D572A6F12967B8CF3C66C878E5E9D" blockId="4.[136,1452,158,1949]" pageId="4" pageNumber="159">
The new
<emphasis id="93E68B386F12967B8D6AC66C848D5E30" box="[292,416,1814,1840]" italics="true" pageId="4" pageNumber="159">Aristolochi</emphasis>
a species described here, together with the previously known seven congeneric species (
<bibRefCitation id="C5032ADB6F12967B893EC66C85C05E54" author="Le, K. D. &amp; Do, T. V." pageId="4" pageNumber="159" pagination="159 - 163" refId="ref5022" refString="Le, K. D. &amp; Do, T. V. (2022) Two new records of Aristolochia (Aristolochiaceae) for the Flora of Lao PDR. Acta Phytotaxonomica et Geobotanica 73 (2): 159 - 163. https: // doi. org / 10.18942 / apg. 202118" type="journal article" year="2022">Le &amp; Do 2022</bibRefCitation>
), increases the number of
<taxonomicName id="66922CA96F12967B8E5EC64087DF5E54" box="[528,754,1850,1876]" pageId="4" pageNumber="159">
<emphasis id="93E68B386F12967B8E5EC64087B75E54" box="[528,666,1850,1876]" italics="true" pageId="4" pageNumber="159">Aristolochia</emphasis>
species
</taxonomicName>
occurring in the flora of
<collectingCountry id="D98517BA6F12967B8847C64181125E55" box="[1033,1087,1851,1877]" name="Laos" pageId="4" pageNumber="159">Laos</collectingCountry>
to eight, of which five belong to subgenus
<emphasis id="93E68B386F12967B8CB9C62484A55E78" box="[247,392,1886,1912]" italics="true" pageId="4" pageNumber="159">
<taxonomicName id="66922CA96F12967B8CB9C62484A95E78" authorityName="Linnaeus" authorityYear="1753" box="[247,388,1886,1912]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="genus">Aristolochia</taxonomicName>
,
</emphasis>
and three to subgenus
<taxonomicName id="66922CA96F12967B8EC9C62487CC5E78" authorityName="Schmidt" authorityYear="1935" baseAuthorityName="Duch." baseAuthorityYear="1854" box="[647,737,1886,1912]" class="Magnoliopsida" family="Aristolochiaceae" genus="Siphisia" higherTaxonomySource="GBIF" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="genus">
<emphasis id="93E68B386F12967B8EC9C62487CC5E78" box="[647,737,1886,1912]" italics="true" pageId="4" pageNumber="159">Siphisia</emphasis>
</taxonomicName>
. Here we provide an identification key to identify all the known species of the genus
<taxonomicName id="66922CA96F12967B8D3EC6F884D75E9C" authorityName="Linnaeus" authorityYear="1753" box="[368,506,1922,1948]" class="Magnoliopsida" family="Aristolochiaceae" genus="Aristolochia" kingdom="Plantae" order="Piperales" pageId="4" pageNumber="159" phylum="Tracheophyta" rank="genus">
<emphasis id="93E68B386F12967B8D3EC6F884D75E9C" box="[368,506,1922,1948]" italics="true" pageId="4" pageNumber="159">Aristolochia</emphasis>
</taxonomicName>
in the country.
</paragraph>
</subSubSection>
</treatment>
</document>