<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="43284262FF8BFFCA5AB6FAB142F4CBDA" 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 annamicus 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.7571558" ID-Zenodo-Dep="7571558" LSID="urn:lsid:plazi:treatment:43284262FF8BFFCA5AB6FAB142F4CBDA" httpUri="http://treatment.plazi.org/id/43284262FF8BFFCA5AB6FAB142F4CBDA" pageId="20">
<subSubSection box="[136,966,1299,1327]" pageId="20" type="nomenclature">
<paragraph blockId="20.[136,1452,1299,1397]" box="[136,966,1299,1327]" pageId="20">
<emphasis bold="true" box="[136,157,1300,1326]" pageId="20">1.</emphasis>
<taxonomicName ID-CoL="3SCGJ" authority="Pit. (1924: 379)" authorityName="Pit." authorityPageNumber="379" authorityYear="1924" box="[164,611,1299,1326]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="20" phylum="Tracheophyta" rank="species" species="annamicus">
<emphasis bold="true" box="[164,428,1299,1326]" italics="true" pageId="20">Lasianthus annamicus</emphasis>
Pit. (1924: 379)
</taxonomicName>
— 
<figureCitation box="[641,719,1300,1326]" captionStart="FIGURE 14" captionStartId="21.[136,229,1773,1795]" captionTargetBox="[168,1414,194,1745]" captionTargetId="figure-17@21.[166,1418,193,1749]" captionTargetPageId="21" captionText="FIGURE 14. Lasianthus annamicus Pit. (from Dang 392, VNM): A. Flowering branches, B. Stipules, C. Close-up of young branch and leaves, D. Abaxial leaf surfaces, E. Flower showing side view of calyx and corolla, F. Inflorescence showing lateral view of flower bud and corolla lobes." figureDoi="http://doi.org/10.5281/zenodo.7571592" httpUri="https://zenodo.org/record/7571592/files/figure.png" pageId="20">Fig. 14</figureCitation>
(plate), 
<figureCitation box="[813,892,1300,1327]" captionStart="FIGURE 15" captionStartId="22.[136,229,1778,1800]" captionTargetBox="[173,1409,201,1747]" captionTargetId="figure-24@22.[165,1418,193,1754]" captionTargetPageId="22" captionText="FIGURE 15. Distribution maps of Lasianthus annamicus, L. attenuatus, L. bachmaensis and L. bidoupensis." figureDoi="http://doi.org/10.5281/zenodo.7571596" httpUri="https://zenodo.org/record/7571596/files/figure.png" pageId="20">Fig. 15</figureCitation>
(map)
</paragraph>
</subSubSection>
<subSubSection pageId="20" type="materials_examined">
<paragraph blockId="20.[136,1452,1299,1397]" pageId="20">
<emphasis bold="true" box="[136,194,1340,1361]" pageId="20">Type:</emphasis>
— 
<materialsCitation collectingDate="1919-04-30" collectorName="A. Chevalier" country="Vietnam" elevation="900" location="Langbian Plateau" pageId="20" specimenCount="1" stateProvince="Lam Dong" typeStatus="holotype">
<collectingCountry box="[219,332,1340,1361]" name="Vietnam" pageId="20">VIETNAM</collectingCountry>
. 
<collectingRegion box="[346,554,1340,1362]" country="Vietnam" name="Lam Dong" pageId="20">Lam Dong Province</collectingRegion>
, 
<location LSID="urn:lsid:plazi:treatment:43284262FF8BFFCA5AB6FAB142F4CBDA:CE5EA5AFFF8BFFCA5806FA9942C1C91A" box="[568,743,1340,1362]" country="Vietnam" name="Langbian Plateau" pageId="20" stateProvince="Lam Dong">Langbian Plateau</location>
, 
<quantity box="[758,884,1340,1361]" metricMagnitude="2" metricUnit="m" metricValue="9.0" metricValueMax="10.0" metricValueMin="8.0" pageId="20" unit="m" value="900.0" valueMax="1000.0" valueMin="800.0">
<elevation box="[758,884,1340,1361]" metricMagnitude="2" metricUnit="m" metricValue="9.0" metricValueMax="10.0" metricValueMin="8.0" pageId="20" unit="m" value="900.0" valueMax="1000.0" valueMin="800.0">800–1000 m</elevation>
</quantity>
elev., 
<date box="[957,1103,1340,1362]" pageId="20" value="1919-04-30">
<collectingDate box="[957,1103,1340,1362]" pageId="20" value="1919-04-30">30 April 1919</collectingDate>
</date>
, 
<emphasis box="[1118,1316,1340,1361]" italics="true" pageId="20">
<collectorName box="[1118,1245,1340,1361]" pageId="20">A. Chevalier</collectorName>
40425
</emphasis>
(
<typeStatus box="[1333,1419,1340,1362]" pageId="20">holotype</typeStatus>
P! [P02285255])
</materialsCitation>
.
</paragraph>
<paragraph blockId="20.[136,1452,1444,1939]" pageId="20">
<emphasis bold="true" box="[136,395,1444,1470]" pageId="20">
<collectingRegion box="[136,262,1444,1470]" pageId="20">Specimens</collectingRegion>
examined:
</emphasis>
— 
<materialsCitation collectingDate="2019-07-12" collectionCode="VNM" collectorName="Dang V. S. &amp; Hoang N. S. &amp; Dang" country="Vietnam" elevation="1430" location="Dalat City" municipality="Bidoup Nui Ba National Park" pageId="20" specimenCount="1" stateProvince="Lam Dong">
<collectingCountry box="[424,556,1444,1470]" name="Vietnam" pageId="20">VIETNAM</collectingCountry>
. 
<emphasis bold="true" box="[567,659,1444,1470]" pageId="20">Central</emphasis>
: 
<collectingRegion box="[674,906,1444,1471]" country="Vietnam" name="Lam Dong" pageId="20">Lam Dong Province</collectingRegion>
, 
<collectingMunicipality box="[918,1256,1444,1471]" pageId="20">Bidoup Nui Ba National Park</collectingMunicipality>
, 
<quantity box="[1269,1341,1444,1471]" metricMagnitude="4" metricUnit="m" metricValue="5.0" pageId="20" unit="km" value="50.0">50 km</quantity>
northeast of 
<location LSID="urn:lsid:plazi:treatment:43284262FF8BFFCA5AB6FAB142F4CBDA:CE5EA5AFFF8BFFCA5A98FA6D413DC9AA" box="[166,283,1480,1506]" country="Vietnam" municipality="Bidoup Nui Ba National Park" name="Dalat City" pageId="20" stateProvince="Lam Dong">Dalat City</location>
, 
<quantity box="[294,379,1480,1507]" metricMagnitude="3" metricUnit="m" metricValue="1.43" pageId="20" unit="m" value="1430.0">
<elevation box="[294,379,1480,1507]" metricMagnitude="3" metricUnit="m" metricValue="1.43" pageId="20" unit="m" value="1430.0">1430 m</elevation>
</quantity>
elev., 
<date box="[452,600,1480,1506]" pageId="20" value="2019-07-12">
<collectingDate box="[452,600,1480,1506]" pageId="20" value="2019-07-12">12 July 2019</collectingDate>
</date>
, 
<emphasis box="[611,1012,1480,1506]" italics="true" pageId="20">
<collectorName box="[611,722,1480,1506]" pageId="20">Dang V.S.</collectorName>
&amp; 
<collectorName box="[757,890,1480,1506]" pageId="20">Hoang N.S.</collectorName>
, 
<collectorName box="[901,963,1481,1506]" pageId="20">Dang</collectorName>
392
</emphasis>
(
<collectionCode box="[1027,1098,1480,1506]" country="Viet Nam" httpUri="http://grbio.org/cool/tj07-dt2h" name="Institute of Tropical Biology" pageId="20" type="Herbarium">VNM</collectionCode>
)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="20" type="distribution">
<paragraph blockId="20.[136,1452,1444,1939]" pageId="20">
<emphasis bold="true" box="[189,345,1516,1542]" pageId="20">Distribution:</emphasis>
—Endemic to 
<collectingCountry box="[510,605,1516,1542]" name="Vietnam" pageId="20">Vietnam</collectingCountry>
(currently known as Bidoup Nui Ba National Park in 
<collectingRegion box="[1222,1452,1516,1543]" country="Vietnam" name="Lam Dong" pageId="20">Lam Dong Province</collectingRegion>
and Hon Ba Nature Reserve in 
<collectingRegion box="[486,726,1552,1579]" country="Vietnam" name="Khanh Hoa" pageId="20">Khanh Hoa Province</collectingRegion>
).
</paragraph>
<paragraph blockId="20.[136,1452,1444,1939]" box="[189,1362,1588,1615]" pageId="20">
<emphasis bold="true" box="[189,423,1588,1614]" pageId="20">Habitat &amp; Ecology:</emphasis>
—Growing under the shade of the primary forest on fertile soil at 
<quantity box="[1161,1302,1588,1615]" metricMagnitude="3" metricUnit="m" metricValue="1.25" metricValueMax="1.7" metricValueMin="0.8" pageId="20" unit="m" value="1250.0" valueMax="1700.0" valueMin="800.0">800–1700 m</quantity>
elev.
</paragraph>
<paragraph blockId="20.[136,1452,1444,1939]" box="[189,892,1624,1651]" pageId="20">
<emphasis bold="true" box="[189,323,1624,1650]" pageId="20">Phenology:</emphasis>
—Flowering and fruiting from April to September.
</paragraph>
<paragraph blockId="20.[136,1452,1444,1939]" box="[189,654,1660,1688]" pageId="20">
<emphasis bold="true" box="[189,405,1660,1686]" pageId="20">Vernacular name:</emphasis>
—Xú hưƠng trung bộ.
</paragraph>
<paragraph blockId="20.[136,1452,1444,1939]" pageId="20">
<emphasis bold="true" box="[189,265,1696,1722]" pageId="20">Notes:</emphasis>
— 
<taxonomicName box="[294,543,1696,1722]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="20" phylum="Tracheophyta" rank="species" species="annamicus">
<emphasis box="[294,543,1696,1722]" italics="true" pageId="20">Lasianthus annamicus</emphasis>
</taxonomicName>
was described by 
<bibRefCitation author="Pitard, J." box="[743,889,1696,1722]" pageId="20" pagination="395" refId="ref55116" refString="Pitard, J. (1924) Rubiacees In: Lecomte, P. H., Humbert, H. &amp; Gagnepain, F. (Eds.) Flore generale de l'Indo-Chine 3: 395. Masson, Paris, pp. 20 - 442." type="journal article" year="1924">Pitard (1924)</bibRefCitation>
from a Vietnamese specimen (
<emphasis box="[1227,1442,1696,1722]" italics="true" pageId="20">A. Chevalier 40425</emphasis>
) which was collected from Langbian Plateau of 
<collectingRegion box="[670,902,1732,1759]" country="Vietnam" name="Lam Dong" pageId="20">Lam Dong Province</collectingRegion>
. It is characterized by having branches of brown ferruginous hirsute, leaf blade oblong-lanceolate, secondary veins 8–9 on each side of midrib, inflorescences axillary, cymose, 1–3-flowered, bracts 
<quantity box="[474,539,1804,1831]" metricMagnitude="-3" metricUnit="m" metricValue="5.0" pageId="20" unit="mm" value="5.0">5 mm</quantity>
long, and calyx with lobes 6.
</paragraph>
<paragraph blockId="20.[136,1452,1444,1939]" pageId="20">
This species is closely related to 
<taxonomicName authority="Jack" authorityName="Jack" authorityYear="1823" box="[564,769,1840,1866]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="20" phylum="Tracheophyta" rank="species" species="attenuatus">
<emphasis box="[564,711,1841,1866]" italics="true" pageId="20">L. attenuatus</emphasis>
Jack
</taxonomicName>
based on fruit and inflorescences shape, and flower color at anthesis, but differs from the latter in having cuneate leaf base (vs. oblique, cordate or rounded bases in 
<taxonomicName authorityName="Jack" authorityYear="1823" box="[1296,1442,1877,1902]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="20" phylum="Tracheophyta" rank="species" species="attenuatus">
<emphasis box="[1296,1442,1877,1902]" italics="true" pageId="20">L. attenuatus</emphasis>
</taxonomicName>
) and calyx with lobes 6 (vs. lobes 
<quantity box="[509,552,1912,1939]" metricMagnitude="-1" metricUnit="m" metricValue="1.27" pageId="20" unit="in" value="5.0">5 in</quantity>
<taxonomicName authorityName="Jack" authorityYear="1823" box="[559,706,1913,1938]" class="Magnoliopsida" family="Rubiaceae" genus="Lasianthus" kingdom="Plantae" order="Gentianales" pageId="20" phylum="Tracheophyta" rank="species" species="attenuatus">
<emphasis box="[559,706,1913,1938]" italics="true" pageId="20">L. attenuatus</emphasis>
</taxonomicName>
).
</paragraph>
</subSubSection>
</treatment>
</document>