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<document ID-DOI="10.11646/phytotaxa.581.1.1" ID-ISSN="1179-3163" ID-Zenodo-Dep="7571550" approvalRequired="50" approvalRequired_for_taxonomicNames="15" approvalRequired_for_textStreams="30" approvalRequired_for_treatments="5" checkinTime="1674712547726" checkinUser="plazi" docAuthor="Dang, Van-Son &amp; Naiki, Akiyo" docDate="2023" docId="43284262FF80FFC15AB6FDA341E3C970" docLanguage="en" docName="phytotaxa.581.1.1.pdf" docOrigin="Phytotaxa 581 (1)" docSource="http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN" docStyle="DocumentStyle:F08184CE06D8A97EA3E6DE35D99648B0.1:Phytotaxa.2014-.monograph" docStyleId="F08184CE06D8A97EA3E6DE35D99648B0" docStyleName="Phytotaxa.2014-.monograph" docStyleVersion="1" docTitle="Lasianthus cambodianus Pit. 1924" docType="treatment" docVersion="2" lastPageNumber="1935" masterDocId="BF113A1AFF9FFFDE5A3EFFA54026CC48" masterDocTitle="A revision of the genus Lasianthus Jack (Rubiaceae) from Vietnam" masterLastPageNumber="1935" masterPageNumber="1921" pageNumber="1921" updateTime="1674713874756" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>A revision of the genus Lasianthus Jack (Rubiaceae) from Vietnam</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Dang, Van-Son</mods:namePart>
<mods:nameIdentifier type="ORCID">0000-0001-8681-4141</mods:nameIdentifier>
<mods:affiliation>Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. &amp; Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam. &amp; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam. &amp; dvsonitb @ gmail. com; https: // orcid. org / 0000 - 0001 - 8681 - 4141</mods:affiliation>
<mods:nameIdentifier type="email">dvsonitb@gmail.com</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Naiki, Akiyo</mods:namePart>
<mods:nameIdentifier type="ORCID">0000-0002-3235-2823</mods:nameIdentifier>
<mods:affiliation>Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. &amp; Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. &amp; naiki @ lab. u-ryukyu. ac. jp; https: // orcid. org / 0000 - 0002 - 3235 - 2823 * Author for correspondence</mods:affiliation>
<mods:nameIdentifier type="email">naiki@lab.u-ryukyu.ac.jp</mods:nameIdentifier>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Phytotaxa</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2023</mods:date>
<mods:detail type="pubDate">
<mods:number>2023-01-26</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>581</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>1</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>1921</mods:start>
<mods:end>1935</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.11646/phytotaxa.581.1.1</mods:identifier>
<mods:identifier type="ISSN">1179-3163</mods:identifier>
<mods:identifier type="Zenodo-Dep">7571550</mods:identifier>
</mods:mods>
<treatment ID-DOI="http://doi.org/10.5281/zenodo.7571588" ID-Zenodo-Dep="7571588" LSID="urn:lsid:plazi:treatment:43284262FF80FFC15AB6FDA341E3C970" httpUri="http://treatment.plazi.org/id/43284262FF80FFC15AB6FDA341E3C970" pageId="31">
<subSubSection box="[136,993,518,545]" pageId="31" type="nomenclature">
<paragraph blockId="31.[136,1452,518,616]" box="[136,993,518,545]" pageId="31">
<emphasis bold="true" box="[136,157,518,544]" pageId="31">7.</emphasis>
<taxonomicName ID-CoL="3SCHZ" authority="Pit. (1924: 382)" authorityName="Pit." authorityPageNumber="382" authorityYear="1924" box="[164,638,518,545]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="31" phylum="Tracheophyta" rank="species" species="cambodianus">
<emphasis bold="true" box="[164,454,518,545]" italics="true" pageId="31">Lasianthus cambodianus</emphasis>
Pit. (1924: 382)
</taxonomicName>
<figureCitation box="[668,745,518,544]" captionStart="FIGURE 22" captionStartId="32.[136,229,1758,1780]" captionTargetBox="[169,1414,196,1730]" captionTargetId="figure-24@32.[165,1418,193,1734]" captionTargetPageId="32" captionText="FIGURE 22. Lasianthus cambodianus Pit. (from Dang 417, VNM): A. Branch with flower and bracts, B. Close-up of young branch and leaves, C. Stipules, D. Abaxial leaf surfaces, E. Inflorescence showing side view flower and bracts, F. Bracts, GH. Flowers showing side view corolla lobes and stamens." figureDoi="http://doi.org/10.5281/zenodo.7571614" httpUri="https://zenodo.org/record/7571614/files/figure.png" pageId="31">Fig. 22</figureCitation>
(plate),
<figureCitation box="[839,919,518,544]" captionStart="FIGURE 20" captionStartId="29.[136,229,1789,1811]" captionTargetBox="[180,1403,201,1747]" captionTargetId="figure-18@29.[165,1418,193,1765]" captionTargetPageId="29" captionText="FIGURE 20. Distribution maps of Lasianthus biflorus, L. caeruleus, L. cambodianus and L. camlamensis." figureDoi="http://doi.org/10.5281/zenodo.7571608" httpUri="https://zenodo.org/record/7571608/files/figure.png" pageId="31">Fig. 20</figureCitation>
(map)
</paragraph>
</subSubSection>
<subSubSection pageId="31" type="materials_examined">
<paragraph blockId="31.[136,1452,518,616]" pageId="31">
<emphasis bold="true" box="[136,194,558,579]" pageId="31">Type:</emphasis>
<materialsCitation collectingDate="1870-05" country="Cambodia" location="Kompong Pseu Province" municipality="Montibus Knang Krepoeu" pageId="31" specimenCount="1" typeStatus="holotype">
<collectingCountry box="[219,352,558,579]" name="Cambodia" pageId="31">CAMBODIA</collectingCountry>
.
<location LSID="urn:lsid:plazi:treatment:43284262FF80FFC15AB6FDA341E3C970:CE5EA5AFFF80FFC15B57FD8B427DCE0C" box="[361,603,558,580]" country="Cambodia" municipality="Montibus Knang Krepoeu" name="Kompong Pseu Province" pageId="31">Kompong Pseu Province</location>
,
<collectingMunicipality box="[613,867,558,580]" pageId="31">Montibus Knang Krepoeu</collectingMunicipality>
,
<date box="[877,977,558,579]" pageId="31" value="1870-05">
<collectingDate box="[877,977,558,579]" pageId="31" value="1870-05">May 1870</collectingDate>
</date>
,
<emphasis box="[987,1102,558,579]" italics="true" pageId="31">Pierre 1256</emphasis>
(
<typeStatus box="[1115,1201,558,580]" pageId="31">holotype</typeStatus>
P! [P04009927]; isotypes A! [A00096529], P! [P04009928])
</materialsCitation>
.
</paragraph>
<paragraph blockId="31.[136,1452,662,1337]" pageId="31">
<emphasis bold="true" box="[136,397,662,688]" pageId="31">
<collectingRegion box="[136,262,662,688]" pageId="31">Specimens</collectingRegion>
examined:
</emphasis>
<materialsCitation collectingDate="2017-02-12" collectorName="Tagane S. &amp; Nagamasu H." country="Vietnam" elevation="1067" location="Ngoc Linh Nature Reserve" pageId="31" specimenCount="1" stateProvince="Kon Tum">
<collectingCountry box="[426,558,662,688]" name="Vietnam" pageId="31">VIETNAM</collectingCountry>
.
<emphasis bold="true" box="[572,673,662,688]" pageId="31">Central:</emphasis>
<collectingRegion box="[684,908,662,689]" country="Vietnam" name="Kon Tum" pageId="31">Kon Tum Province</collectingRegion>
,
<location LSID="urn:lsid:plazi:treatment:43284262FF80FFC15AB6FDA341E3C970:CE5EA5AFFF80FFC159A5FD3244F1CEF9" box="[923,1239,662,689]" country="Vietnam" name="Ngoc Linh Nature Reserve" pageId="31" stateProvince="Kon Tum">Ngoc Linh Nature Reserve</location>
,
<quantity box="[1254,1343,662,689]" metricMagnitude="3" metricUnit="m" metricValue="1.067" pageId="31" unit="m" value="1067.0">
<elevation box="[1254,1343,662,689]" metricMagnitude="3" metricUnit="m" metricValue="1.067" pageId="31" unit="m" value="1067.0">1067 m</elevation>
</quantity>
elev.,
<date pageId="31" value="2017-02-12">
<collectingDate pageId="31" value="2017-02-12">12 February 2017</collectingDate>
</date>
,
<emphasis box="[312,685,699,725]" italics="true" pageId="31">
<collectorName box="[312,422,699,725]" pageId="31">Tagane S.</collectorName>
,
<collectorName box="[433,588,699,724]" pageId="31">Nagamasu H.</collectorName>
, Nguyen
</emphasis>
</materialsCitation>
<materialsCitation collectingDate="2019-07-26" collectionCode="DLU, FU, VNM" collectorName="Hoang T. B. &amp; Hoang T. S. &amp; Yang C. J. &amp; Kawakubo A. V &amp; Dang V. S. &amp; Naiki A." country="Vietnam" elevation="1193" location="Bach Ma National Park" pageId="31" specimenCount="1" stateProvince="Thua Thien Hue Province">
<emphasis box="[690,1371,698,725]" italics="true" pageId="31">
<taxonomicNameLabel box="[690,739,699,724]" pageId="31" rank="variety">
<collectingCountry box="[690,739,699,724]" name="Vietnam" pageId="31">V.N.</collectingCountry>
</taxonomicNameLabel>
,
<collectorName box="[749,878,699,724]" pageId="31">Hoang T.B.</collectorName>
,
<collectorName box="[888,1014,699,725]" pageId="31">Hoang T.S.</collectorName>
,
<collectorName box="[1025,1133,699,725]" pageId="31">Yang C.J.</collectorName>
,
<collectorName box="[1143,1316,698,725]" pageId="31">Kawakubo A. V</collectorName>
6361
</emphasis>
(
<collectionCode box="[1385,1447,698,724]" pageId="31">DLU</collectionCode>
,
<collectionCode box="[136,176,734,760]" country="China" name="Fudan University, Department of Biology" pageId="31">FU</collectionCode>
);
<collectingRegion box="[195,487,734,761]" inferredBySuffix="true" pageId="31">Thua Thien Hue Province</collectingRegion>
,
<location LSID="urn:lsid:plazi:treatment:43284262FF80FFC15AB6FDA341E3C970:CE5EA5AFFF80FFC15BCCFD7B42DACEB0" box="[498,764,734,761]" country="Vietnam" name="Bach Ma National Park" pageId="31" stateProvince="Thua Thien Hue Province">Bach Ma National Park</location>
,
<quantity box="[775,859,734,761]" metricMagnitude="3" metricUnit="m" metricValue="1.193" pageId="31" unit="m" value="1193.0">
<elevation box="[775,859,734,761]" metricMagnitude="3" metricUnit="m" metricValue="1.193" pageId="31" unit="m" value="1193.0">1193 m</elevation>
</quantity>
elev.,
<date box="[931,1078,734,760]" pageId="31" value="2019-07-26">
<collectingDate box="[931,1078,734,760]" pageId="31" value="2019-07-26">26 July 2019</collectingDate>
</date>
,
<emphasis box="[1089,1451,734,761]" italics="true" pageId="31">
<collectorName box="[1089,1200,735,761]" pageId="31">Dang V.S.</collectorName>
&amp;
<collectorName box="[1235,1328,734,761]" pageId="31">Naiki A.</collectorName>
, Dang 417
</emphasis>
(
<collectionCode box="[144,215,770,796]" country="Viet Nam" httpUri="http://grbio.org/cool/tj07-dt2h" name="Institute of Tropical Biology" pageId="31" type="Herbarium">VNM</collectionCode>
)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="31" type="distribution">
<paragraph blockId="31.[136,1452,662,1337]" pageId="31">
<emphasis bold="true" box="[189,345,806,832]" pageId="31">Distribution:</emphasis>
—Indochina region (
<collectingCountry box="[586,708,806,832]" name="Cambodia" pageId="31">Cambodia</collectingCountry>
). In
<collectingCountry box="[765,863,806,832]" name="Vietnam" pageId="31">Vietnam</collectingCountry>
,
<taxonomicName box="[877,1160,806,832]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="31" phylum="Tracheophyta" rank="species" species="cambodianus">
<emphasis box="[877,1160,806,832]" italics="true" pageId="31">Lasianthus cambodianus</emphasis>
</taxonomicName>
occurs in
<collectingRegion box="[1289,1400,807,833]" country="Vietnam" name="Kon Tum" pageId="31">Kon Tum</collectingRegion>
and Thua Thien Hue.
</paragraph>
<paragraph blockId="31.[136,1452,662,1337]" pageId="31">
<emphasis bold="true" box="[189,422,878,904]" pageId="31">Habitat &amp; Ecology:</emphasis>
—Growing in shaded understory of evergreen forest, at
<quantity box="[1045,1200,878,905]" metricMagnitude="3" metricUnit="m" metricValue="1.1" metricValueMax="1.2" metricValueMin="1.0" pageId="31" unit="m" value="1100.0" valueMax="1200.0" valueMin="1000.0">10001200 m</quantity>
elev. This species was collected in the forest habitats where dominated by species of
<taxonomicName box="[831,938,914,940]" class="Magnoliopsida" family="Fabaceae" kingdom="Plantae" order="Fabales" pageId="31" phylum="Tracheophyta" rank="family">Fabaceae</taxonomicName>
,
<taxonomicName authorityName="Dumortier" authorityYear="1829" box="[949,1056,915,941]" class="Magnoliopsida" family="Fagaceae" kingdom="Plantae" order="Fagales" pageId="31" phylum="Tracheophyta" rank="family">Fagaceae</taxonomicName>
,
<taxonomicName box="[1067,1185,915,941]" class="Magnoliopsida" family="Lauraceae" kingdom="Plantae" order="Laurales" pageId="31" phylum="Tracheophyta" rank="family">Lauraceae</taxonomicName>
,
<taxonomicName box="[1196,1316,914,940]" class="Magnoliopsida" family="Rubiaceae" kingdom="Plantae" order="Gentianales" pageId="31" phylum="Tracheophyta" rank="family">Rubiaceae</taxonomicName>
,
<taxonomicName box="[1326,1447,915,941]" class="Magnoliopsida" family="Myrtaceae" kingdom="Plantae" order="Myrtales" pageId="31" phylum="Tracheophyta" rank="family">Myrtaceae</taxonomicName>
, and
<taxonomicName box="[183,308,950,976]" class="Magnoliopsida" family="Clusiaceae" kingdom="Plantae" order="Malpighiales" pageId="31" phylum="Tracheophyta" rank="family">Clusiaceae</taxonomicName>
.
</paragraph>
<paragraph blockId="31.[136,1452,662,1337]" box="[189,853,986,1013]" pageId="31">
<emphasis bold="true" box="[189,323,986,1012]" pageId="31">Phenology:</emphasis>
—Flowering from May to July. Fruits not seen.
</paragraph>
<paragraph blockId="31.[136,1452,662,1337]" box="[189,643,1022,1051]" pageId="31">
<emphasis bold="true" box="[189,405,1022,1048]" pageId="31">Vernacular name:</emphasis>
—Xú hưƠng cambốt.
</paragraph>
<paragraph blockId="31.[136,1452,662,1337]" pageId="31">
<emphasis bold="true" box="[189,265,1058,1084]" pageId="31">Notes:</emphasis>
<taxonomicName box="[294,574,1058,1084]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="31" phylum="Tracheophyta" rank="species" species="cambodianus">
<emphasis box="[294,574,1058,1084]" italics="true" pageId="31">Lasianthus cambodianus</emphasis>
</taxonomicName>
was first recorded for the flora of
<collectingCountry box="[970,1065,1058,1084]" name="Vietnam" pageId="31">Vietnam</collectingCountry>
by
<bibRefCitation author="Dang, V. S. &amp; Tagane, S. &amp; Toyama, H. &amp; Nguyen, V. N. &amp; Hoang, N. S. &amp; Naiki, A." box="[1109,1322,1058,1085]" pageId="31" pagination="263 - 267" refId="ref53933" refString="Dang, V. S., Tagane, S., Toyama, H., Nguyen, V. N., Hoang, N. S. &amp; Naiki, A. (2017) A new record Lasianthus cambodianus Pit. (Rubiaceae) for the flora of Vietnam. Journal of Biotechnology 15 (3 A): 263 - 267." type="journal article" year="2017">
Dang
<emphasis box="[1178,1236,1058,1084]" italics="true" pageId="31">et al.</emphasis>
(2017)
</bibRefCitation>
. It is easily recognizable in the field in having lanceolate to oval-oblong leaves, midrib and nerves strongly prominent abaxially, secondary veins 1518 on each side of midrib, bracts
<quantity box="[731,823,1130,1157]" metricMagnitude="-3" metricUnit="m" metricValue="7.0" metricValueMax="8.0" metricValueMin="6.0" pageId="31" unit="mm" value="7.0" valueMax="8.0" valueMin="6.0">68 mm</quantity>
long and bracteoles
<quantity box="[1051,1143,1130,1157]" metricMagnitude="-3" metricUnit="m" metricValue="5.0" metricValueMax="6.0" metricValueMin="4.0" pageId="31" unit="mm" value="5.0" valueMax="6.0" valueMin="4.0">46 mm</quantity>
long, and corolla white and lobes 5.
</paragraph>
<paragraph blockId="31.[136,1452,662,1337]" pageId="31">
<taxonomicName box="[189,469,1202,1228]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="31" phylum="Tracheophyta" rank="species" species="cambodianus">
<emphasis box="[189,469,1202,1228]" italics="true" pageId="31">Lasianthus cambodianus</emphasis>
</taxonomicName>
is closely related to
<taxonomicName authority="Naiki (2015: 165)" authorityName="Naiki" authorityPageNumber="165" authorityYear="2015" box="[704,1053,1202,1229]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="31" phylum="Tracheophyta" rank="species" species="giganteus">
<emphasis box="[704,843,1203,1228]" italics="true" pageId="31">L. giganteus</emphasis>
<bibRefCitation author="Naiki, A. &amp; Tagane, S. &amp; Chhang, P. &amp; Toyama, H. &amp; Zhu, H. &amp; Dang, V. S. &amp; Yahara, T." box="[851,1053,1202,1229]" pageId="31" pagination="153 - 179" refId="ref54656" refString="Naiki, A., Tagane, S., Chhang, P., Toyama, H., Zhu, H., Dang, V. S. &amp; Yahara, T. (2015) Flora of Bokor National Park, Cambodia II: four new species and nine new records of Lasianthus (Rubiaceae) from Cambodia. Acta Phytotaxonomica et Geobotanica 66 (3): 153 - 179. https: // doi. org / 10.18942 / apg. KJ 00010115702" type="journal article" year="2015">Naiki (2015: 165)</bibRefCitation>
</taxonomicName>
which was described in 2015 from Bokor National Park of
<collectingCountry box="[411,529,1238,1264]" name="Cambodia" pageId="31">Cambodia</collectingCountry>
, but differs in its smaller leaves (2026 ×
<quantity box="[1014,1099,1238,1265]" metricMagnitude="-2" metricUnit="m" metricValue="7.0" metricValueMax="9.0" metricValueMin="5.0" pageId="31" unit="cm" value="7.0" valueMax="9.0" valueMin="5.0">59 cm</quantity>
vs. 2131 ×
<quantity box="[1251,1352,1238,1264]" metricMagnitude="-1" metricUnit="m" metricValue="1.0" metricValueMax="1.1" metricValueMin="0.9" pageId="31" unit="cm" value="10.0" valueMax="11.0" valueMin="9.0">911 cm</quantity>
), shorter petioles (
<quantity box="[240,335,1274,1301]" metricMagnitude="-3" metricUnit="m" metricValue="2.5" metricValueMax="4.0" metricValueMin="1.0" pageId="31" unit="mm" value="2.5" valueMax="4.0" valueMin="1.0">14 mm</quantity>
long vs.
<quantity box="[441,563,1274,1301]" metricMagnitude="-2" metricUnit="m" metricValue="2.0" metricValueMax="2.5" metricValueMin="1.5" pageId="31" unit="mm" value="20.0" valueMax="25.0" valueMin="15.0">1525 mm</quantity>
long), smaller calyx (tubes
<quantity box="[881,947,1274,1301]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="31" unit="mm" value="2.0">2 mm</quantity>
long, lobes
<quantity box="[1087,1153,1274,1301]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="31" unit="mm" value="1.0">1 mm</quantity>
long vs. tube
<quantity box="[1316,1452,1274,1301]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" metricValueMax="3.5" metricValueMin="2.5" pageId="31" unit="mm" value="3.0" valueMax="3.5" valueMin="2.5">2.53.5 mm</quantity>
long, lobes
<quantity box="[266,380,1310,1337]" metricMagnitude="-3" metricUnit="m" metricValue="2.25" metricValueMax="2.5" metricValueMin="2.0" pageId="31" unit="mm" value="2.25" valueMax="2.5" valueMin="2.0">22.5 mm</quantity>
long).
</paragraph>
</subSubSection>
</treatment>
</document>