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<document id="85EE7AA614C27E75FD4BD5400DFE07A6" ID-DOI="10.11646/phytotaxa.606.1.8" ID-ISSN="1179-3163" ID-Zenodo-Dep="8202385" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1690877980668" checkinUser="plazi" docAuthor="Vo, Doan Trung, Averyanov, Leonid, Maisak, Tatiana, Canh, Nguyen Van, Dang, Minh Quan, Dang, Van Son, Truong, Quang Tam &amp; Vuong, Truong Ba" docDate="2023" docId="D12BD7310F6EFFD1FF5BFBB0FAA8FB1D" docLanguage="en" docName="phytotaxa.606.1.8.pdf" docOrigin="Phytotaxa 606 (1)" docSource="http://dx.doi.org/10.11646/phytotaxa.606.1.8" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.6:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="6" docTitle="Chiloschista quangdangii Vuong &amp; Aver. A. Flowering 2023, sp. nov." docType="treatment" docVersion="2" lastPageNumber="83" masterDocId="2D12AF490F6FFFD5FFD3FFC4FFDAFF99" masterDocTitle="Chiloschista quangdangii, a new leafless orchid (Orchidaceae) from northern Vietnam" masterLastPageNumber="84" masterPageNumber="79" pageNumber="80" updateTime="1690878344963" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="91F674ED70E84D920D47519689180B18">Chiloschista quangdangii, a new leafless orchid (Orchidaceae) from northern Vietnam</mods:title>
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<mods:namePart id="5168BD40F15C6EA5F4FBF3041B54D5DE">Averyanov, Leonid</mods:namePart>
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<mods:affiliation id="378309019DE198C9F6285F475D5F5394">Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov Street 2, 197376, St. Petersburg, Russia. &amp; av _ leonid @ mail. ru; https: // orcid. org / 0000 - 0001 - 8031 - 2925</mods:affiliation>
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<mods:affiliation id="94621F6C621A63CF0D0D986B7D88084D">Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov Street 2, 197376, St. Petersburg, Russia. &amp; tmaisak @ mail. ru; https: // orcid. org / 0000 - 0001 - 5919 - 6755</mods:affiliation>
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<mods:namePart id="F708C6A978C946DFCCB814890843F94F">Dang, Van Son</mods:namePart>
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<mods:title id="0F467D8216E7264A650EC3AF62C3D7C8">Phytotaxa</mods:title>
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<taxonomicName id="9E821DA40F6EFFD4FF5BFBB0FDBAFB17" authority="Vuong &amp; Aver." authorityName="Vuong &amp; Aver. A. Flowering" authorityYear="2023" box="[136,608,1140,1167]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="1" pageNumber="80" phylum="Tracheophyta" rank="species" species="quangdangii" status="sp. nov.">
<emphasis id="6BF6BA350F6EFFD4FF5BFBB0FE6AFB16" bold="true" box="[136,432,1140,1167]" italics="true" pageId="1" pageNumber="80">Chiloschista quangdangii</emphasis>
Vuong &amp; Aver.
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<figureCitation id="C1B97AA20F6EFFD4FF42FB5CFF0EFB2B" box="[145,212,1176,1202]" captionStart="FIGURE 1" captionStartId="2.[136,245,1847,1873]" captionTargetBox="[215,1372,187,1824]" captionTargetId="figure-22@2.[215,1372,187,1824]" captionTargetPageId="2" captionText="FIGURE 1. Chiloschista quangdangii Vuong &amp; Aver. A. Flowering plant. B. Apical part of the inflorescence. C. Portion of rachis with fully open flowers. D. Floral bract, adaxial and abaxial side. E. Flowers, frontal and back views. F. Median sepal, abaxial and adaxial side. G. Lateral sepal, abaxial and adaxial side. H. Petal, abaxial and adaxial side. I. Lip, views from different angles. J. Lip, sagittal section. K. Ovary and column, side view. L. Column, with and without anther cap, frontal view. M. Column apex, with and without pollinarium. N. Anther cap, view from above and from below. O. Pollinarium, frontal and back view. Photos by Truong Ba Vuong from the type specimen BV 1748. Photo correction and design by L. Averyanov and T. Maisak." figureDoi="http://doi.org/10.5281/zenodo.8202387" httpUri="https://zenodo.org/record/8202387/files/figure.png" pageId="1" pageNumber="80">
<emphasis id="6BF6BA350F6EFFD4FF42FB5CFF0EFB2B" bold="true" box="[145,212,1176,1202]" pageId="1" pageNumber="80">Fig. 1</emphasis>
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:—
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,
<date id="2D3C40E70F6EFFD4FAE0FAE8FA7DFAD8" box="[1331,1447,1324,1346]" pageId="1" pageNumber="80" value="2023-06-06">
<collectingDate id="3D78B90F0F6EFFD4FAE0FAE8FA7DFAD8" box="[1331,1447,1324,1346]" pageId="1" pageNumber="80" value="2023-06-06">6 June 2023</collectingDate>
</date>
,
<emphasis id="6BF6BA350F6EFFD4FF6EFA94FDC7FAFC" box="[189,541,1360,1381]" italics="true" pageId="1" pageNumber="80">
<location id="5C5D30FC0F6EFFD4FF6EFA94FEB2FAFC" LSID="urn:lsid:plazi:treatment:D12BD7310F6EFFD1FF5BFBB0FAA8FB1D:5C5D30FC0F6EFFD4FF6EFA94FEB2FAFC" box="[189,360,1360,1381]" country="Vietnam" county="Quan Ba District" municipality="Quyet Tien Commune" name="Truong Ba Vuong" pageId="1" pageNumber="80" stateProvince="Ha Giang">Truong Ba Vuong</location>
,
<collectorName id="F47703F10F6EFFD4FEA1FA94FDC7FAFC" box="[370,541,1360,1381]" pageId="1" pageNumber="80">Ngo Quang Dang</collectorName>
</emphasis>
,
<emphasis id="6BF6BA350F6EFFD4FDFAFA94FDA6FAFC" box="[553,636,1360,1381]" italics="true" pageId="1" pageNumber="80">BV 1749</emphasis>
(
<specimenCode id="0924CE5C0F6EFFD4FD5BFA94FCFCFAFF" box="[648,806,1360,1382]" collectionCode="VNM" country="Viet Nam" httpUri="http://grbio.org/cool/tj07-dt2h" name="Institute of Tropical Biology" pageId="1" pageNumber="80" type="Herbarium">VNM00063980</specimenCode>
)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="119835AC0F6EFFD4FF5BFA50FB63FA6F" pageId="1" pageNumber="80" type="diagnosis">
<paragraph id="593D66270F6EFFD4FF5BFA50FB63FA6F" blockId="1.[136,1452,1428,2067]" pageId="1" pageNumber="80">
<emphasis id="6BF6BA350F6EFFD4FF5BFA50FF21FA37" bold="true" box="[136,251,1428,1454]" pageId="1" pageNumber="80">Diagnosis</emphasis>
:—The newly discovered species can be distinguished from the closely related
<taxonomicName id="9E821DA40F6EFFD4FBADFA50FB2DFA37" authorityName="Seidenfaden" authorityYear="1988" box="[1150,1271,1428,1454]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="1" pageNumber="80" phylum="Tracheophyta" rank="species" species="parishii">
<emphasis id="6BF6BA350F6EFFD4FBADFA50FB2DFA37" box="[1150,1271,1428,1454]" italics="true" pageId="1" pageNumber="80">C. parishii</emphasis>
</taxonomicName>
by its narrowly saccate spur-like hypochile and the presence of a small callus on the lip disc. Additionally, it differs from the similar
<taxonomicName id="9E821DA40F6EFFD4FF5BFA18FEEDFA6F" box="[136,311,1500,1526]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="1" pageNumber="80" phylum="Tracheophyta" rank="species" species="glabrisepala">
<emphasis id="6BF6BA350F6EFFD4FF5BFA18FEEDFA6F" box="[136,311,1500,1526]" italics="true" pageId="1" pageNumber="80">C. glabrisepala</emphasis>
</taxonomicName>
due to its densely hairy hypochile on the inside and the small callus on the disc.
</paragraph>
</subSubSection>
<subSubSection id="119835AC0F6EFFD4FF6EF9C4FDF9F9A7" pageId="1" pageNumber="80" type="etymology">
<paragraph id="593D66270F6EFFD4FF6EF9C4FDF9F9A7" blockId="1.[136,1452,1428,2067]" pageId="1" pageNumber="80">
<emphasis id="6BF6BA350F6EFFD4FF6EF9C4FEE4F983" bold="true" box="[189,318,1536,1562]" pageId="1" pageNumber="80">Etymology</emphasis>
:—The species is named after Mr. Ngo Quang Dang, who successfully cultivated the plant and kindly provided the materials for this study.
</paragraph>
</subSubSection>
<subSubSection id="119835AC0F6EFFD1FF6EF98CFDB8FEF4" lastPageId="4" lastPageNumber="83" pageId="1" pageNumber="80" type="description">
<paragraph id="593D66270F6EFFD1FF6EF98CFDB8FEF4" blockId="1.[136,1452,1428,2067]" lastBlockId="4.[136,1452,158,1157]" lastPageId="4" lastPageNumber="83" pageId="1" pageNumber="80">
<emphasis id="6BF6BA350F6EFFD4FF6EF98CFE9DF9FB" bold="true" box="[189,327,1608,1634]" pageId="1" pageNumber="80">Description</emphasis>
:—
<emphasis id="6BF6BA350F6EFFD4FEBFF98CFE70F9FB" bold="true" box="[364,426,1608,1634]" pageId="1" pageNumber="80">Herb</emphasis>
leafless (during anthesis), miniature, monopodial, with an abbreviated stem ca.
<quantity id="9E7ACBC20F6EFFD4FAE2F98CFAA8F9FA" box="[1329,1394,1608,1635]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="1" pageNumber="80" unit="mm" value="3.0">3 mm</quantity>
long and many long, glabrous, flattened, green roots.
<emphasis id="6BF6BA350F6EFFD4FD7AF9A8FC9DF91F" bold="true" box="[681,839,1644,1670]" pageId="1" pageNumber="80">Inflorescence</emphasis>
green, marked with brown, up to
<quantity id="9E7ACBC20F6EFFD4FB15F9A8FAD1F91E" box="[1222,1291,1644,1671]" metricMagnitude="-1" metricUnit="m" metricValue="1.3" pageId="1" pageNumber="80" unit="cm" value="13.0">13 cm</quantity>
long, covered by short white hairs; peduncle ca.
<quantity id="9E7ACBC20F6EFFD4FDDFF954FD9EF932" box="[524,580,1680,1707]" metricMagnitude="-2" metricUnit="m" metricValue="5.0" pageId="1" pageNumber="80" unit="cm" value="5.0">5 cm</quantity>
long, with 3 distant brownish sterile bracts; rachis ca.
<quantity id="9E7ACBC20F6EFFD4FB63F954FB32F932" box="[1200,1256,1680,1707]" metricMagnitude="-2" metricUnit="m" metricValue="8.0" pageId="1" pageNumber="80" unit="cm" value="8.0">8 cm</quantity>
long, bears 2–15 flowers; floral bracts rectangular-ovate, acuminate, ca.
<quantity id="9E7ACBC20F6EFFD4FCD1F970FCADF956" box="[770,887,1716,1743]" metricMagnitude="-3" metricUnit="m" metricValue="3.75" metricValueMax="4.0" metricValueMin="3.5" pageId="1" pageNumber="80" unit="mm" value="3.75" valueMax="4.0" valueMin="3.5">3.5–4 mm</quantity>
long, keeled and, sparsely hairy with short hairs abaxially.
<emphasis id="6BF6BA350F6EFFD4FF2DF91CFE03F96B" bold="true" box="[254,473,1752,1778]" pageId="1" pageNumber="80">Pedicel and ovary</emphasis>
ca.
<quantity id="9E7ACBC20F6EFFD4FDDDF91CFD88F96A" box="[526,594,1752,1779]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="1" pageNumber="80" unit="mm" value="3.0">3 mm</quantity>
long, densely white hairy.
<emphasis id="6BF6BA350F6EFFD4FC5CF91CFC34F96B" bold="true" box="[911,1006,1752,1778]" pageId="1" pageNumber="80">Flowers</emphasis>
open from the base, sepals and petals yellow with many large orange blotches, lip almost white, side lobes with 2–3 orange dots outside and many orange warty streaks inside.
<emphasis id="6BF6BA350F6EFFD4FEA4F8E4FDC2F8A3" bold="true" box="[375,536,1824,1850]" pageId="1" pageNumber="80">Median sepal</emphasis>
obovate,
<quantity id="9E7ACBC20F6EFFD4FD5BF8E4FD21F8A2" box="[648,763,1824,1851]" metricMagnitude="-3" metricUnit="m" metricValue="6.75" metricValueMax="7.0" metricValueMin="6.5" pageId="1" pageNumber="80" unit="mm" value="6.75" valueMax="7.0" valueMin="6.5">6.5–7 mm</quantity>
long,
<quantity id="9E7ACBC20F6EFFD4FC90F8E4FC7BF8A2" box="[835,929,1824,1851]" metricMagnitude="-3" metricUnit="m" metricValue="4.5" metricValueMax="5.0" metricValueMin="4.0" pageId="1" pageNumber="80" unit="mm" value="4.5" valueMax="5.0" valueMin="4.0">4–5 mm</quantity>
wide, rounded at the apex, slightly retuse and sparcely ciliate along the margin.
<emphasis id="6BF6BA350F6EFFD4FDD2F880FD72F8C7" bold="true" box="[513,680,1860,1886]" pageId="1" pageNumber="80">Lateral sepals</emphasis>
broadly obovate, slightly oblique,
<quantity id="9E7ACBC20F6EFFD4FBFEF880FB45F8C6" box="[1069,1183,1860,1887]" metricMagnitude="-3" metricUnit="m" metricValue="5.75" metricValueMax="6.0" metricValueMin="5.5" pageId="1" pageNumber="80" unit="mm" value="5.75" valueMax="6.0" valueMin="5.5">5.5–6 mm</quantity>
long, ca.
<quantity id="9E7ACBC20F6EFFD4FAD8F880FAB2F8C6" box="[1291,1384,1860,1887]" metricMagnitude="-3" metricUnit="m" metricValue="3.5" metricValueMax="4.0" metricValueMin="3.0" pageId="1" pageNumber="80" unit="mm" value="3.5" valueMax="4.0" valueMin="3.0">3–4 mm</quantity>
wide, rounded or blunt at the apex and sparcely ciliate at margin.
<emphasis id="6BF6BA350F6EFFD4FCE1F8ACFCA0F81B" bold="true" box="[818,890,1896,1922]" pageId="1" pageNumber="80">Petals</emphasis>
obscurely rectangular,
<quantity id="9E7ACBC20F6EFFD4FB57F8ACFB2DF81A" box="[1156,1271,1896,1923]" metricMagnitude="-3" metricUnit="m" metricValue="5.75" metricValueMax="6.0" metricValueMin="5.5" pageId="1" pageNumber="80" unit="mm" value="5.75" valueMax="6.0" valueMin="5.5">5.5–6 mm</quantity>
long, ca.
<quantity id="9E7ACBC20F6EFFD4FABAF8ACFA76F81A" box="[1385,1452,1896,1923]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="1" pageNumber="80" unit="mm" value="4.0">4 mm</quantity>
wide, truncate or rounded at apex, glabrous on both surfaces and ciliate along the margin.
<emphasis id="6BF6BA350F6EFFD4FB78F848FB0FF83F" bold="true" box="[1195,1237,1932,1958]" pageId="1" pageNumber="80">Lip</emphasis>
3-lobed, narrowly saccate, spur-like; side lobes somewhat rhomboid, oblique,
<quantity id="9E7ACBC20F6EFFD4FCFDF874FC78F852" box="[814,930,1968,1995]" metricMagnitude="-3" metricUnit="m" metricValue="2.25" metricValueMax="2.5" metricValueMin="2.0" pageId="1" pageNumber="80" unit="mm" value="2.25" valueMax="2.5" valueMin="2.0">2–2.5 mm</quantity>
long, ca.
<quantity id="9E7ACBC20F6EFFD4FBC0F874FB8FF852" box="[1043,1109,1968,1995]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="1" pageNumber="80" unit="mm" value="2.0">2 mm</quantity>
wide, erect, forward directed, apex obtuse or truncate; median lobe very small, triangular, glabrous, ca.
<quantity id="9E7ACBC20F6EFFD4FC1EF810FBD5F876" box="[973,1039,2004,2031]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="1" pageNumber="80" unit="mm" value="1.0">1 mm</quantity>
long, slightly down curved, apex 2- lobed, somewhat fleshy; central callus shortly oblong, knob-like, farinose, ca.
<quantity id="9E7ACBC20F6EFFD4FBDDF83CFB88F78A" box="[1038,1106,2040,2067]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="1" pageNumber="80" unit="mm" value="1.0">1 mm</quantity>
long and wide, slightly down curved, apex 2-lobed; base of the lip spur-like, obconoid tapering to the apex; back-wall callus white, fleshy, erect, conoid, covered by short stiff white hairs except proximal part, bifid at the apex, front wall with longitudinal ridge, densely corved by short stiff white hairs.
<emphasis id="6BF6BA350F6BFFD1FD82FF22FD6BFE99" bold="true" box="[593,689,230,256]" pageId="4" pageNumber="83">Column</emphasis>
stout, ca.
<quantity id="9E7ACBC20F6BFFD1FCF1FF22FCB8FE98" box="[802,866,230,257]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="4" pageNumber="83" unit="mm" value="2.0">2 mm</quantity>
long and wide; stigma transversely elliptic to almost circular, concave; column foot at oblique angle to column and ovary, forward directed, ca.
<quantity id="9E7ACBC20F6BFFD1FBACFECEFB2BFEBC" box="[1151,1265,266,293]" metricMagnitude="-3" metricUnit="m" metricValue="3.75" metricValueMax="4.0" metricValueMin="3.5" pageId="4" pageNumber="83" unit="mm" value="3.75" valueMax="4.0" valueMin="3.5">3.5–4 mm</quantity>
long; anther cap with 2 filiform lateral setae, ca.
<quantity id="9E7ACBC20F6BFFD1FE26FEEAFDEDFED0" box="[501,567,302,329]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="4" pageNumber="83" unit="mm" value="2.0">2 mm</quantity>
long; pollinarium with 2 pollinia, oblong stipe slightly contracted at the base, and rectangular viscidium.
<emphasis id="6BF6BA350F6BFFD1FE6AFE96FE2DFEF5" bold="true" box="[441,503,338,364]" pageId="4" pageNumber="83">Fruit</emphasis>
not seen.
</paragraph>
</subSubSection>
<caption id="0DFD36AF0F6DFFD7FF5BF8F3FCEAF7B3" ID-DOI="http://doi.org/10.5281/zenodo.8202387" ID-Zenodo-Dep="8202387" httpUri="https://zenodo.org/record/8202387/files/figure.png" pageId="2" pageNumber="81" startId="2.[136,245,1847,1873]" targetBox="[215,1372,187,1824]" targetPageId="2" targetType="figure">
<paragraph id="593D66270F6DFFD7FF5BF8F3FCEAF7B3" blockId="2.[136,1452,1847,2090]" pageId="2" pageNumber="81">
<emphasis id="6BF6BA350F6DFFD7FF5BF8F3FECEF8C8" bold="true" box="[136,276,1847,1873]" pageId="2" pageNumber="81">FIGURE 1.</emphasis>
<taxonomicName id="9E821DA40F6DFFD7FECDF8F3FC7AF8CB" authority="Vuong &amp; Aver. A. Flowering" authorityName="Vuong &amp; Aver. A. Flowering" authorityYear="2023" box="[286,928,1847,1874]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="2" pageNumber="81" phylum="Tracheophyta" rank="species" species="quangdangii">
<emphasis id="6BF6BA350F6DFFD7FECDF8F3FD93F8CB" bold="true" box="[286,585,1847,1874]" italics="true" pageId="2" pageNumber="81">Chiloschista quangdangii</emphasis>
Vuong &amp; Aver. A. Flowering
</taxonomicName>
plant. B. Apical part of the inflorescence. C. Portion of rachis with fully open flowers. D. Floral bract, adaxial and abaxial side. E. Flowers, frontal and back views. F. Median sepal, abaxial and adaxial side. G. Lateral sepal, abaxial and adaxial side. H. Petal, abaxial and adaxial side. I. Lip, views from different angles. J. Lip, sagittal section. K. Ovary and column, side view. L. Column, with and without anther cap, frontal view. M. Column apex, with and without pollinarium. N. Anther cap, view from above and from below. O. Pollinarium, frontal and back view. Photos by Truong Ba Vuong from the type specimen BV 1748. Photo correction and design by L. Averyanov and T. Maisak.
</paragraph>
</caption>
<caption id="0DFD36AF0F6CFFD6FF5BF859FD9BF7BD" ID-DOI="http://doi.org/10.5281/zenodo.8202389" ID-Zenodo-Dep="8202389" httpUri="https://zenodo.org/record/8202389/files/figure.png" pageId="3" pageNumber="82" startId="3.[136,245,1949,1975]" targetBox="[178,1410,187,1925]" targetPageId="3" targetType="figure">
<paragraph id="593D66270F6CFFD6FF5BF859FD9BF7BD" blockId="3.[136,1452,1949,2084]" pageId="3" pageNumber="82">
<emphasis id="6BF6BA350F6CFFD6FF5BF859FED6F82E" bold="true" box="[136,268,1949,1975]" pageId="3" pageNumber="82">FIGURE 2</emphasis>
.
<emphasis id="6BF6BA350F6CFFD6FECEF859FDB5F82E" bold="true" box="[285,623,1949,1976]" pageId="3" pageNumber="82">
<emphasis id="6BF6BA350F6CFFD6FECEF859FD90F821" bold="true" box="[285,586,1949,1976]" italics="true" pageId="3" pageNumber="82">
<taxonomicName id="9E821DA40F6CFFD6FECEF859FD9CF821" box="[285,582,1949,1976]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="3" pageNumber="82" phylum="Tracheophyta" rank="species" species="glabrisepala">Chiloschista glabrisepala</taxonomicName>
.
</emphasis>
A.
</emphasis>
Flower, frontal view.
<emphasis id="6BF6BA350F6CFFD6FCA2F859FC51F82E" bold="true" box="[881,907,1949,1975]" pageId="3" pageNumber="82">B.</emphasis>
Lip, view from above.
<emphasis id="6BF6BA350F6CFFD6FB4DF859FB60F82E" bold="true" box="[1182,1210,1949,1975]" pageId="3" pageNumber="82">C.</emphasis>
Lip, sagittal section.
<taxonomicName id="9E821DA40F6CFFD6FF5BF805FE75F845" authorityName="Vuong &amp; Aver. A. Flowering" authorityYear="2023" box="[136,431,1985,2012]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="3" pageNumber="82" phylum="Tracheophyta" rank="species" species="quangdangii">
<emphasis id="6BF6BA350F6CFFD6FF5BF805FE75F845" bold="true" box="[136,431,1985,2012]" italics="true" pageId="3" pageNumber="82">Chiloschista quangdangii</emphasis>
</taxonomicName>
.
<emphasis id="6BF6BA350F6CFFD6FE6EF805FE02F842" bold="true" box="[445,472,1985,2011]" pageId="3" pageNumber="82">D.</emphasis>
Flower, frontal view.
<emphasis id="6BF6BA350F6CFFD6FD1FF805FD3FF842" bold="true" box="[716,741,1985,2011]" pageId="3" pageNumber="82">E.</emphasis>
Lip, view from above.
<emphasis id="6BF6BA350F6CFFD6FC3AF805FBD9F842" bold="true" box="[1001,1027,1985,2011]" pageId="3" pageNumber="82">E.</emphasis>
Lip, sagittal section. Photo by Truong Ba Vuong from the type of
<taxonomicName id="9E821DA40F6CFFD6FE16F822FD3CF866" authority=", BV 1443" authorityName=", BV" authorityYear="1443" box="[453,742,2021,2048]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="3" pageNumber="82" phylum="Tracheophyta" rank="species" species="glabrisepala">
<emphasis id="6BF6BA350F6CFFD6FE16F822FD3CF866" box="[453,742,2021,2048]" italics="true" pageId="3" pageNumber="82">C. glabrisepala, BV 1443</emphasis>
</taxonomicName>
(A–C) and the type of
<taxonomicName id="9E821DA40F6CFFD6FC20F822FAD4F866" authority="BV 1748" authorityName="BV" authorityYear="1748" box="[1011,1294,2021,2048]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="3" pageNumber="82" phylum="Tracheophyta" rank="species" species="quangdangii">
<emphasis id="6BF6BA350F6CFFD6FC20F822FAD4F866" box="[1011,1294,2021,2048]" italics="true" pageId="3" pageNumber="82">C. quangdangii BV 1748</emphasis>
</taxonomicName>
(D–F). Photo correction and design by L. Averyanov.
</paragraph>
</caption>
<subSubSection id="119835AC0F6BFFD1FF6EFEB2FAA8FB1D" pageId="4" pageNumber="83" type="distribution">
<paragraph id="593D66270F6BFFD1FF6EFEB2FA79FE09" blockId="4.[136,1452,158,1157]" box="[189,1443,374,401]" pageId="4" pageNumber="83">
<emphasis id="6BF6BA350F6BFFD1FF6EFEB2FE95FE09" bold="true" box="[189,335,374,400]" pageId="4" pageNumber="83">Distribution</emphasis>
:—Northen
<collectingCountry id="219526B70F6BFFD1FE05FEB2FDEFFE09" box="[470,565,374,400]" name="Vietnam" pageId="4" pageNumber="83">Vietnam</collectingCountry>
(
<collectingRegion id="9B46A8C50F6BFFD1FD90FEB2FCFBFE09" box="[579,801,374,400]" country="Vietnam" name="Ha Giang" pageId="4" pageNumber="83">Ha Giang Province</collectingRegion>
). Endemic, currently known only from the
<typeStatus id="8639D8850F6BFFD1FAD9FEB3FAE0FE08" box="[1290,1338,375,401]" pageId="4" pageNumber="83">type</typeStatus>
location.
</paragraph>
<paragraph id="593D66270F6BFFD1FF6EFE5EFA4BFE2C" blockId="4.[136,1452,158,1157]" box="[189,1425,410,437]" pageId="4" pageNumber="83">
<emphasis id="6BF6BA350F6BFFD1FF6EFE5EFE15FE2D" bold="true" box="[189,463,410,436]" pageId="4" pageNumber="83">Habitat and phenology</emphasis>
:—Miniature leafless branch epiphyte. Primary broad-leaved forests. Flowers in June.
</paragraph>
<paragraph id="593D66270F6BFFD1FF6EFE7AFA89FD4D" blockId="4.[136,1452,158,1157]" pageId="4" pageNumber="83">
<emphasis id="6BF6BA350F6BFFD1FF6EFE7AFDF4FE41" bold="true" box="[189,558,446,472]" pageId="4" pageNumber="83">Estimated conservation status</emphasis>
:—Five specimens of the newly discovered species were collected by local residents from the forest in the vicinity of Lung Muoi Village and subsequently offered for sale in the local plant market. Unfortunately, specific details regarding the species’ habitat, environmental conditions, and rarity remain unclear. Nevertheless, the extensive collection of these plants for commercial purposes serves as compelling evidence that the sole known population is being significantly depleted and may face imminent extinction. Considering the limited extent of occurrence (EOO) and area of occupancy (AOO) of the species, which are estimated to be less than
<quantity id="9E7ACBC20F6BFFD1FF5BFD52FF07FD2A" box="[136,221,662,691]" metricMagnitude="5" metricUnit="m" metricValue="1.0" pageId="4" pageNumber="83" unit="km" value="100.0">100 km</quantity>
² and
<quantity id="9E7ACBC20F6BFFD1FEC9FD52FEB9FD2A" box="[282,355,662,691]" metricMagnitude="4" metricUnit="m" metricValue="1.0" pageId="4" pageNumber="83" unit="km" value="10.0">10 km</quantity>
², respectively, the preliminary conservation status of the new species can be classified as critically endangered.– CR following to formal IUCN (2022) criteria, CR A3(a,d), B1(a,bi,ii), B2(a,bi,ii), C1, C2(ai,ii).
</paragraph>
<paragraph id="593D66270F6BFFD1FF6EFD1AFBFFFB81" blockId="4.[136,1452,158,1157]" pageId="4" pageNumber="83">
<emphasis id="6BF6BA350F6BFFD1FF6EFD1AFF2FFD61" bold="true" box="[189,245,734,760]" pageId="4" pageNumber="83">Note</emphasis>
:—
<taxonomicName id="9E821DA40F6BFFD1FECAFD1AFDE0FD61" authorityName="BV" authorityYear="1748" box="[281,570,734,760]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="4" pageNumber="83" phylum="Tracheophyta" rank="species" species="quangdangii">
<emphasis id="6BF6BA350F6BFFD1FECAFD1AFDE0FD61" box="[281,570,734,760]" italics="true" pageId="4" pageNumber="83">Chiloschista quangdangii</emphasis>
</taxonomicName>
resembles both
<taxonomicName id="9E821DA40F6BFFD1FD22FD1BFCB3FD61" authorityName="Seidenfaden" authorityYear="1988" box="[753,873,734,761]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="4" pageNumber="83" phylum="Tracheophyta" rank="species" species="parishii">
<emphasis id="6BF6BA350F6BFFD1FD22FD1BFCB3FD61" box="[753,873,734,761]" italics="true" pageId="4" pageNumber="83">C. parishii</emphasis>
</taxonomicName>
and
<taxonomicName id="9E821DA40F6BFFD1FC72FD1BFB95FD61" authorityName=", BV" authorityYear="1443" box="[929,1103,734,761]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="4" pageNumber="83" phylum="Tracheophyta" rank="species" species="glabrisepala">
<emphasis id="6BF6BA350F6BFFD1FC72FD1BFB95FD61" box="[929,1103,734,761]" italics="true" pageId="4" pageNumber="83">C. glabrisepala</emphasis>
</taxonomicName>
in plant habit and flower color scheme; as a result, it may be easily confused with these species. From
<taxonomicName id="9E821DA40F6BFFD1FC46FCC7FBD6FC85" authorityName="Seidenfaden" authorityYear="1988" box="[917,1036,770,797]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="4" pageNumber="83" phylum="Tracheophyta" rank="species" species="parishii">
<emphasis id="6BF6BA350F6BFFD1FC46FCC7FBD6FC85" box="[917,1036,770,797]" italics="true" pageId="4" pageNumber="83">C. parishii</emphasis>
</taxonomicName>
(morphological detail were compiled from
<bibRefCitation id="3D131BD60F6BFFD1FF15FCE2FE6CFCD9" author="Gyeltshen, C. &amp; Dalstrom, S. &amp; Gyeltshen, N. &amp; Tobgay, K." box="[198,438,806,832]" pageId="4" pageNumber="83" pagination="23 - 29" refId="ref3102" refString="Gyeltshen, C., Dalstrom, S., Gyeltshen, N. &amp; Tobgay, K. (2019) A new spotted Chiloschista (Orchidaceae: Aeridinae) from Bhutan. Lankesteriana 19 (1): 23 - 29. http: // dx. doi. org / 10.15517 / lank. v 19 i 1.37030" type="journal article" year="2019">
Gyeltshen
<emphasis id="6BF6BA350F6BFFD1FEECFCE3FEADFCD9" box="[319,375,806,832]" italics="true" pageId="4" pageNumber="83">et al.</emphasis>
2019
</bibRefCitation>
&amp;
<bibRefCitation id="3D131BD60F6BFFD1FE08FCE2FDCCFCD9" author="Gyeltshen, N. &amp; Gyeltshen, C. &amp; Tobgay, K. &amp; Dalstrom, S. &amp; Gurung, D. B. &amp; Gyeltshen, N. &amp; Ghalley, B. B." box="[475,534,806,832]" pageId="4" pageNumber="83" pagination="281 - 299" refId="ref3163" refString="Gyeltshen, N., Gyeltshen, C., Tobgay, K., Dalstrom, S., Gurung, D. B., Gyeltshen, N. &amp; Ghalley, B. B. (2020) Two new spotted Chiloschista species (Orchidaceae: Aeridinae) from Bhutan. Lankesteriana 20 (3): 281 - 299. https: // doi. org / 10.15517 / lank. v 20 i 3.44149" type="journal article" year="2020">2020</bibRefCitation>
, and
<bibRefCitation id="3D131BD60F6BFFD1FD82FCE2FC71FCD9" author="Dalstrom, S. &amp; Kolanowska, M." box="[593,939,806,832]" pageId="4" pageNumber="83" pagination="241 - 248" refId="ref2843" refString="Dalstrom, S. &amp; Kolanowska, M. (2020) A new yellow-flowered Chiloschista (Orchidaceae: Aeridinae) from Thailand. Lankesteriana 20 (2): 241 - 248. https: // doi. org / 10.15517 / lank. v 20 i 2.43454" type="journal article" year="2020">Dalström &amp; Kolanowska 2020</bibRefCitation>
) our plant differs in a narrowly saccate, spur-like lip (vs. a lip base broadly saccate or cup-shaped), a small farinose callus on the disc, distinctly smaller than the median lip lobe (vs. a callus densely hairy with short stiff hairs, as large as the median lip lobe or larger), and a lip glabrous inside except for the farinose callus (vs. a lip inside densely hairy). The new species shares the narrowly saccate, spur-like lip base with
<taxonomicName id="9E821DA40F6BFFD1FE34FC73FD4FFC49" authorityName=", BV" authorityYear="1443" box="[487,661,950,977]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="4" pageNumber="83" phylum="Tracheophyta" rank="species" species="glabrisepala">
<emphasis id="6BF6BA350F6BFFD1FE34FC73FD4FFC49" box="[487,661,950,977]" italics="true" pageId="4" pageNumber="83">C. glabrisepala</emphasis>
</taxonomicName>
but differs in the densely hairy spur inside (vs. spur inside with sparce hairs) and the small farinose callus on the lip disc, which is much smaller than the lip median lobe (vs. callus as large as the lip median lobe or larger, densely covered by short dense stiff hairs) (
<figureCitation id="C1B97AA20F6BFFD1FC0AFC3AFBC6FB81" box="[985,1052,1022,1048]" captionStart="FIGURE 2" captionStartId="3.[136,245,1949,1975]" captionTargetBox="[178,1410,187,1925]" captionTargetId="figure-17@3.[178,1410,187,1925]" captionTargetPageId="3" captionText="FIGURE 2. Chiloschista glabrisepala. A. Flower, frontal view. B. Lip, view from above. C. Lip, sagittal section. Chiloschista quangdangii. D. Flower, frontal view. E. Lip, view from above. E. Lip, sagittal section. Photo by Truong Ba Vuong from the type of C. glabrisepala, BV 1443 (A–C) and the type of C. quangdangii BV 1748 (D–F). Photo correction and design by L. Averyanov." figureDoi="http://doi.org/10.5281/zenodo.8202389" httpUri="https://zenodo.org/record/8202389/files/figure.png" pageId="4" pageNumber="83">
<emphasis id="6BF6BA350F6BFFD1FC0AFC3AFBC6FB81" bold="true" box="[985,1052,1022,1048]" pageId="4" pageNumber="83">Fig. 2</emphasis>
</figureCitation>
)
</paragraph>
<paragraph id="593D66270F6BFFD1FF6EFBE7FAA8FB1D" blockId="4.[136,1452,158,1157]" pageId="4" pageNumber="83">
In addition, the new species shared the narrowly saccate, spur-like lip to
<taxonomicName id="9E821DA40F6BFFD1FC3CFBE7FAB3FBA5" authority="Holttum (1966: 147)" authorityName="Holttum" authorityPageNumber="147" authorityYear="1966" box="[1007,1385,1058,1085]" class="Liliopsida" family="Orchidaceae" genus="Chiloschista" kingdom="Plantae" order="Asparagales" pageId="4" pageNumber="83" phylum="Tracheophyta" rank="species" species="sweelimii">
<emphasis id="6BF6BA350F6BFFD1FC3CFBE7FBA0FBA5" box="[1007,1146,1058,1085]" italics="true" pageId="4" pageNumber="83">C. sweelimii</emphasis>
<bibRefCitation id="3D131BD60F6BFFD1FB52FBE6FAB3FBA5" author="Holttum, R. E." box="[1153,1385,1058,1084]" pageId="4" pageNumber="83" pagination="146 - 147" refId="ref3242" refString="Holttum, R. E. (1966) A new Chiloschista from Malaya. Orchid Review 174: 146 - 147." type="journal article" year="1966">Holttum (1966: 147)</bibRefCitation>
</taxonomicName>
but it differs by the glabrous lip outside surface (vs. minutely papillose externally) the smooth hairy inside spur (vs. lip sac with jagged calli), base of callus inconspicuous calli on sides (vs. a large callus on two side, at base of mid lobe)
</paragraph>
</subSubSection>
</treatment>
</document>
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