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<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.178.66462" ID-GBIF-Dataset="15a7344e-4045-4976-8d7b-57d9c9ca774f" ID-PMC="PMC8195976" ID-Pensoft-Pub="1314-2003-178-171" ID-Pensoft-UUID="3B69A5EFF8D35C3480905C29F2E9E3FD" ID-PubMed="34163299" ModsDocID="1314-2003-178-171" checkinTime="1622838155654" checkinUser="pensoft" docAuthor="Tian, Dai-Ke, Chen, Bin, Xiao, Yan, Zheng, Min-Min &amp; Ge, Bin-Jie" docDate="2021" docId="50D8D710BB365556ABAE4B2BC3CCA3EB" docLanguage="en" docName="PhytoKeys 178: 171-177" docOrigin="PhytoKeys 178" docPubDate="2021-06-04" docSource="http://dx.doi.org/10.3897/phytokeys.178.66462" docTitle="Begonia shenzhenensis D. K. Tian &amp; X. Yun Wang 2021, sp. nov." docType="treatment" docVersion="5" id="3B69A5EFF8D35C3480905C29F2E9E3FD" lastPageNumber="171" masterDocId="3B69A5EFF8D35C3480905C29F2E9E3FD" masterDocTitle="Begonia shenzhenensis, a new species of Begoniaceae from Guangdong, China" masterLastPageNumber="177" masterPageNumber="171" pageNumber="171" updateTime="1668140344901" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Begonia shenzhenensis, a new species of Begoniaceae from Guangdong, China</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Tian, Dai-Ke</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-5387-5300</mods:nameIdentifier>
<mods:affiliation>Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, 3888 Chenhua Road, Songjiang, Shanghai 201602, China &amp; Shanghai Key Laboratory for Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, 3888 Chenhua Road, Songjiang, Shanghai 201602, China</mods:affiliation>
<mods:nameIdentifier type="email">dktian@sibs.ac.cn</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Chen, Bin</mods:namePart>
<mods:affiliation>Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, 3888 Chenhua Road, Songjiang, Shanghai 201602, China &amp; Eastern China Conservation Center for Wild Endangered Plant Resources, Shanghai 201602, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Xiao, Yan</mods:namePart>
<mods:affiliation>Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, 3888 Chenhua Road, Songjiang, Shanghai 201602, China &amp; Shanghai Key Laboratory for Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, 3888 Chenhua Road, Songjiang, Shanghai 201602, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Zheng, Min-Min</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-1103-9360</mods:nameIdentifier>
<mods:affiliation>Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, 3888 Chenhua Road, Songjiang, Shanghai 201602, China &amp; Shanghai Key Laboratory for Plant Functional Genomics and Resources, Shanghai Chenshan Botanical Garden, 3888 Chenhua Road, Songjiang, Shanghai 201602, China &amp; The University of Chinese Academy of Sciences, Beijing 100049, China</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Ge, Bin-Jie</mods:namePart>
<mods:affiliation>Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, 3888 Chenhua Road, Songjiang, Shanghai 201602, China &amp; Eastern China Conservation Center for Wild Endangered Plant Resources, Shanghai 201602, China</mods:affiliation>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>PhytoKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2021</mods:date>
<mods:detail type="pubDate">
<mods:number>2021-06-04</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>178</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>171</mods:start>
<mods:end>177</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.3897/phytokeys.178.66462</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.178.66462</mods:identifier>
<mods:identifier type="Pensoft-Pub">1314-2003-178-171</mods:identifier>
<mods:identifier type="Pensoft-UUID">3B69A5EFF8D35C3480905C29F2E9E3FD</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="182494839" LSID="urn:lsid:plazi:treatment:50D8D710BB365556ABAE4B2BC3CCA3EB" httpUri="http://treatment.plazi.org/id/50D8D710BB365556ABAE4B2BC3CCA3EB" lastPageNumber="171" pageId="0" pageNumber="171">
<subSubSection pageId="0" pageNumber="171" type="nomenclature">
<paragraph pageId="0" pageNumber="171">
<taxonomicName LSID="50D8D710-BB36-5556-ABAE-4B2BC3CCA3EB" authority="D. K. Tian &amp; X. Yun Wang" authorityName="D. K. Tian &amp; X. Yun Wang" authorityYear="2021" class="Magnoliopsida" family="Begoniaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia shenzhenensis" order="Cucurbitales" pageId="0" pageNumber="171" phylum="Tracheophyta" rank="species" species="shenzhenensis" status="sp. nov.">Begonia shenzhenensis D.K.Tian &amp; X.Yun Wang</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="171">sp. nov.</taxonomicNameLabel>
<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Plants and habitat of B. shenzhenensis D. K. Tian &amp; X. Yun Wang A plant at the earliest flowering time (6 June 2020) B plants with the dried fruits matured in the previous year C habitat showing mature plants and seedlings of the new species growing together with mosses and ferns above the rocks. (Photo by Dai-Ke Tian)." figureDoi="10.3897/phytokeys.178.66462.figure1" httpUri="https://binary.pensoft.net/fig/551950" pageId="0" pageNumber="171">
Chinese name:
<normalizedToken originalValue="深圳秋海棠">深圳秋海棠</normalizedToken>
Figs 1
</figureCitation>
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Morphology of Begonia shenzhenensis D. K. Tian &amp; X. Yun Wang A one of the largest plants with flowers (left corner: sections of leaf and petiole showing hairs) B staminate flowers showing in different directions C pistillate flowers, bracts (left: back view of 6 - tepalled flower; right: front view of 5 - tepalled flower) D inflorescence, stipules (left) and bracts (right) E fruits (top: fresh, bottom: dried) and ovary dissection (Photo by Dai-Ke Tian)." figureDoi="10.3897/phytokeys.178.66462.figure2" httpUri="https://binary.pensoft.net/fig/551951" pageId="0" pageNumber="171">, 2</figureCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="171" type="materials_examined">
<paragraph pageId="0" pageNumber="171">
<typeStatus>Type</typeStatus>
.
</paragraph>
<paragraph pageId="0" pageNumber="171">
<materialsCitation collectingDate="2020-06-06" collectorName="Tian, Xiao-Yun Wang, Bin Chen, Shi-Ping Zhong" country="China" county="Shenzhen" elevation="70" latitude="22.724722" location="District" longLatPrecision="21" longitude="114.40056" municipality="Pingshan" specimenCount="1" stateProvince="Guangdong" typeStatus="holotype">
<emphasis bold="true" pageId="0" pageNumber="171">
<collectingCountry name="China">China</collectingCountry>
</emphasis>
.
<collectingRegion country="China" name="Guangdong">Guangdong</collectingRegion>
:
<collectingCounty>Shenzhen</collectingCounty>
(深圳),
<collectingMunicipality>Pingshan</collectingMunicipality>
(坪山)
<location LSID="urn:lsid:plazi:treatment:50D8D710BB365556ABAE4B2BC3CCA3EB:B1F27C92DA91A0AEC450451AA098DD54" country="China" county="Shenzhen" latitude="22.724722" longLatPrecision="21" longitude="114.40056" municipality="Pingshan" name="District" stateProvince="Guangdong">District</location>
,
<location LSID="urn:lsid:plazi:treatment:50D8D710BB365556ABAE4B2BC3CCA3EB:89A4CE5932E6D203334775C23CB1F30C" country="China" county="Shenzhen" latitude="22.724722" longLatPrecision="21" longitude="114.40056" municipality="Pingshan" name="Tiantou Mountain" stateProvince="Guangdong">Tiantou Mountain</location>
(田头山)
<location LSID="urn:lsid:plazi:treatment:50D8D710BB365556ABAE4B2BC3CCA3EB:AB429D8D0DC6AE233962A02A6204EF2F" country="China" county="Shenzhen" latitude="22.724722" longLatPrecision="21" longitude="114.40056" municipality="Pingshan" name="Natural Reserve" stateProvince="Guangdong">Natural Reserve</location>
, on shallow humus soil above the rocky surface under the forest along streams,
<geoCoordinate degrees="22" direction="north" minutes="43" orientation="latitude" precision="15" seconds="29" value="22.724722">22°43'29&quot;N</geoCoordinate>
,
<geoCoordinate degrees="114" direction="east" minutes="24" orientation="longitude" precision="15" seconds="2" value="114.40056">114°24'2&quot;E</geoCoordinate>
, elev.
<quantity metricMagnitude="1" metricUnit="m" metricValue="7.0" unit="m" value="70.0">
<elevation metricMagnitude="1" metricUnit="m" metricValue="7.0" unit="m" value="70.0">70 m</elevation>
</quantity>
,
<collectingDate value="2020-06-06">6 June 2020</collectingDate>
, Dai-Ke
<collectorName>Tian</collectorName>
,
<collectorName>Xiao-Yun Wang</collectorName>
,
<collectorName>Bin Chen</collectorName>
&amp;
<collectorName>Shi-Ping Zhong</collectorName>
, TDK4160 (
<typeStatus>holotype</typeStatus>
, CSH! CSH0182483)
</materialsCitation>
.
</paragraph>
<caption doi="10.3897/phytokeys.178.66462.figure1" httpUri="https://binary.pensoft.net/fig/551950" pageId="0" pageNumber="171" start="Figure 1" startId="F1">
<paragraph pageId="0" pageNumber="171">
<emphasis bold="true" pageId="0" pageNumber="171">Figure 1.</emphasis>
Plants and habitat of
<taxonomicName lsidName="B. shenzhenensis" pageId="0" pageNumber="171" rank="species" species="shenzhenensis">
<emphasis italics="true" pageId="0" pageNumber="171">B. shenzhenensis</emphasis>
</taxonomicName>
D.K.Tian &amp; X.Yun Wang
<emphasis bold="true" pageId="0" pageNumber="171">A</emphasis>
plant at the earliest flowering time (
<date value="2020-06-06">6 June 2020</date>
)
<emphasis bold="true" pageId="0" pageNumber="171">B</emphasis>
plants with the dried fruits matured in the previous year
<emphasis bold="true" pageId="0" pageNumber="171">C</emphasis>
habitat showing mature plants and seedlings of the new species growing together with mosses and ferns above the rocks. (Photo by Dai-Ke Tian).
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="171" type="specimen examined">
<paragraph pageId="0" pageNumber="171">Specimen examined.</paragraph>
<paragraph pageId="0" pageNumber="171">Same locality as type, 21 September 2019, Xiao-Yun Wang, TDK3981 (paratype, CSH); Shanghai Chenshan Plant Science Research Center, cultivated plants under 25 °C room temperature, 7 November 2020, Dai-Ke Tian, TDK4832 (paratype, CSH).</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="171" type="diagnosis">
<paragraph pageId="0" pageNumber="171">Diagnosis.</paragraph>
<paragraph pageId="0" pageNumber="171">
The new species is most similar to
<taxonomicName lsidName="B. coelocentroides" pageId="0" pageNumber="171" rank="species" species="coelocentroides">
<emphasis italics="true" pageId="0" pageNumber="171">B. coelocentroides</emphasis>
</taxonomicName>
Y.M.Shui &amp; Z.D.Wei in the same section,
<taxonomicName authority="Platycentrum" class="Magnoliopsida" family="Apiaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia subsp. Section" order="Cucurbitales" pageId="0" pageNumber="171" phylum="Tracheophyta" rank="section" section="Platycentrum">Begonia Section Platycentrum</taxonomicName>
(J.F.Klotzseh) A.DC. with rhizomatous habit, four tepals of staminate flowers, five tepals of pistillate flower and two-localed ovary, but clearly differs by its densely (vs. sparsely) hairy petioles and blades, hairy (vs. glabrous) ovaries, abtuse (vs. concave) anther apex, and narrower (vs. wider) adaxial fruit wing. It is also close to the small-sized individuals (before mature) of
<taxonomicName lsidName="B. edulis" pageId="0" pageNumber="171" rank="species" species="edulis">
<emphasis italics="true" pageId="0" pageNumber="171">B. edulis</emphasis>
</taxonomicName>
in appearance but differs by its short and small (vs. tall and large) and non-stemmed (vs. stemmed) plants, and hairy (vs. glabrous) pedicels, flowers, and fruits (Table
<tableCitation captionStart="Table 1" captionStartId="T1" captionText="Table 1. Comparison of Begonia shenzhenensis and B. coelocentroides." httpUri="http://table.plazi.org/id/470729C1A9B6A52569936BA509A422B8" pageId="0" pageNumber="171" tableUuid="470729C1A9B6A52569936BA509A422B8">1</tableCitation>
, Fig.
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Morphology of Begonia shenzhenensis D. K. Tian &amp; X. Yun Wang A one of the largest plants with flowers (left corner: sections of leaf and petiole showing hairs) B staminate flowers showing in different directions C pistillate flowers, bracts (left: back view of 6 - tepalled flower; right: front view of 5 - tepalled flower) D inflorescence, stipules (left) and bracts (right) E fruits (top: fresh, bottom: dried) and ovary dissection (Photo by Dai-Ke Tian)." figureDoi="10.3897/phytokeys.178.66462.figure2" httpUri="https://binary.pensoft.net/fig/551951" pageId="0" pageNumber="171">2</figureCitation>
).
</paragraph>
<caption ID-Table-UUID="470729C1A9B6A52569936BA509A422B8" httpUri="http://table.plazi.org/id/470729C1A9B6A52569936BA509A422B8" pageId="0" pageNumber="171" start="Table 1" startId="T1">
<paragraph pageId="0" pageNumber="171">
<emphasis bold="true" pageId="0" pageNumber="171">Table 1.</emphasis>
Comparison of
<taxonomicName authorityName="D. K. Tian &amp; X. Yun Wang" authorityYear="2021" class="Magnoliopsida" family="Apiaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia shenzhenensis" order="Cucurbitales" pageId="0" pageNumber="171" phylum="Tracheophyta" rank="species" species="shenzhenensis">
<emphasis italics="true" pageId="0" pageNumber="171">Begonia shenzhenensis</emphasis>
</taxonomicName>
and
<taxonomicName lsidName="B. coelocentroides" pageId="0" pageNumber="171" rank="species" species="coelocentroides">
<emphasis italics="true" pageId="0" pageNumber="171">B. coelocentroides</emphasis>
</taxonomicName>
.
</paragraph>
</caption>
<paragraph pageId="0" pageNumber="171">
<table pageId="0" pageNumber="171">
<tr pageId="0" pageNumber="171">
<th colspan="1" isEmpty="true" pageId="0" pageNumber="171" rowspan="1">-</th>
<th colspan="1" pageId="0" pageNumber="171" rowspan="1">
<taxonomicName lsidName="B. shenzhenensis" pageId="0" pageNumber="171" rank="species" species="shenzhenensis">
<emphasis italics="true" pageId="0" pageNumber="171">B. shenzhenensis</emphasis>
</taxonomicName>
</th>
<th colspan="1" pageId="0" pageNumber="171" rowspan="1">
<taxonomicName lsidName="B. coelocentroides" pageId="0" pageNumber="171" rank="species" species="coelocentroides">
<emphasis italics="true" pageId="0" pageNumber="171">B. coelocentroides</emphasis>
</taxonomicName>
</th>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">Plant height</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">7-15 cm</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">5-10 cm</td>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">Leaf-blade</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">densely hairy</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">sparsely pilose to nearly glabrous</td>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">
<normalizedToken originalValue="Petiole’s">Petiole's</normalizedToken>
hair
</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">dense</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">sparse</td>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">Peduncle and pedicel</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">hairy</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">glabrous</td>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">Outer staminate tepal</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">hairy</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">sparsely hairy</td>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">Anther apex</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">obtuse</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">concave</td>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">Fruit</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">densely hairy</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">glabrous</td>
</tr>
<tr pageId="0" pageNumber="171">
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">Adaxial wing</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">narrower, 8-10 mm wide</td>
<td colspan="1" pageId="0" pageNumber="171" rowspan="1">wider, 9-14 mm wide</td>
</tr>
</table>
</paragraph>
<caption doi="10.3897/phytokeys.178.66462.figure2" httpUri="https://binary.pensoft.net/fig/551951" pageId="0" pageNumber="171" start="Figure 2" startId="F2">
<paragraph pageId="0" pageNumber="171">
<emphasis bold="true" pageId="0" pageNumber="171">Figure 2.</emphasis>
Morphology of
<taxonomicName authorityName="D. K. Tian &amp; X. Yun Wang" authorityYear="2021" class="Magnoliopsida" family="Apiaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia shenzhenensis" order="Cucurbitales" pageId="0" pageNumber="171" phylum="Tracheophyta" rank="species" species="shenzhenensis">
<emphasis italics="true" pageId="0" pageNumber="171">Begonia shenzhenensis</emphasis>
</taxonomicName>
D.K.Tian &amp; X.Yun Wang
<emphasis bold="true" pageId="0" pageNumber="171">A</emphasis>
one of the largest plants with flowers (left corner: sections of leaf and petiole showing hairs)
<emphasis bold="true" pageId="0" pageNumber="171">B</emphasis>
staminate flowers showing in different directions
<emphasis bold="true" pageId="0" pageNumber="171">C</emphasis>
pistillate flowers, bracts (left: back view of 6-tepalled flower; right: front view of 5-tepalled flower)
<emphasis bold="true" pageId="0" pageNumber="171">D</emphasis>
inflorescence, stipules (left) and bracts (right)
<emphasis bold="true" pageId="0" pageNumber="171">E</emphasis>
fruits (top: fresh, bottom: dried) and ovary dissection (Photo by Dai-Ke Tian).
</paragraph>
</caption>
<paragraph pageId="0" pageNumber="171">
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Herb</emphasis>
perennial, rhizomatous, 7-15 cm tall, monoecious, epiphytic on rock with moss or humus soil.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Rhizome</emphasis>
creeping, 5-10 cm long, internodes unclear to 10 mm long, 5-13 mm thick, unbranched to rarely branched, greenish-brown. Aerial stem absent, or occasionally one very short internoded stem at anthesis.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Leaves</emphasis>
simple, basal, alternate, 4-8 each plant, deciduous in winter.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Stipules</emphasis>
persistent, pale pink, long triangular, 5-8
<normalizedToken originalValue="×">x</normalizedToken>
4-6 mm, abaxially hairy, apex with short arista.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Petioles</emphasis>
light-green to pink, 4-18 cm long, 1.5-5 mm thick, grooved in full-length, short greyish pubescent, less than 1.5 mm long, hair tips often curly.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Leaf-blades</emphasis>
obliquely oval-cordate, 5-22
<normalizedToken originalValue="×">x</normalizedToken>
3.5-16 cm; adaxially green, rarely dark green, rough, short greyish strigose, less than 1 mm long; adaxial veins slightly convex at the base, concave upper part; abaxially greyish-green or lightly red-purple, veins convex, with short greyish strigose, 1-1.5 mm long, leaf veins 7 to 6;
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Leaf base</emphasis>
shallowly cordate, obtuse to nearly overlapping, decurrent part 1-4 cm long; leaf margins serrate, rarely double serrate, occasionally cleft-teethed, with arista; apex acuminate or short-caudate.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Inflorescences</emphasis>
2-4, successively growing from leaf axil of the stem near the shoot, 11-17 cm long; peduncle light green, 8-15 cm long, 2-3.5 mm thick, greyish-white villose, pedicel less hairy, each inflorescence 3-7 flowers, 0-2 pistillate.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Bracts</emphasis>
and bracteoles greenish-white, long triangular, bracts 5-12
<normalizedToken originalValue="×">x</normalizedToken>
3-7 mm; bracteoles 4-11
<normalizedToken originalValue="×">x</normalizedToken>
2-6 mm, both abaxially sparsely white pubescent, ca. 1 mm long, apex acuminate, with sparse cilia.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Staminate flower</emphasis>
: pedicel white or light-green at low part, 1.8-3.4 (4.5) cm long, 1-2 mm thick, short greyish white-pubescent (less than 1 mm long); flower white, 2.5-4.5
<normalizedToken originalValue="×">x</normalizedToken>
2.4-3.7 cm; outer 2, ovate, entire, 1.2-2.2
<normalizedToken originalValue="×">x</normalizedToken>
1.2-2.1 cm, central part thick and abaxial with short grayish white or pink pubescent, indumentum same as pedicel; inner 2, long obovate-lanceolate, glabrous, 10-19
<normalizedToken originalValue="×">x</normalizedToken>
5-9 mm. androecium, 3-4
<normalizedToken originalValue="×">x</normalizedToken>
4-5 mm, stamens 50-92, filaments basally connate into stamen column, 2-3 mm
<normalizedToken originalValue="×">x</normalizedToken>
ca. 1 mm, free part 1-2 mm long, anthers yellow, 0.8-1.2 mm long.
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Pistillate flower</emphasis>
: a pair of pale green bracteoles persistent near ovary, 3-10
<normalizedToken originalValue="×">x</normalizedToken>
1-4 mm; pedicel 9-18 mm long, 1.2-2 mm thick, with extremely short greyish white pubescent, less than 0.5 mm long; flower 30-37
<normalizedToken originalValue="×">x</normalizedToken>
25-37 mm, tepals 5 (rarely 6), outer 4 (5), slightly large, 13-18
<normalizedToken originalValue="×">x</normalizedToken>
7-15 mm, sparsely greyish white short pubescent, inner 1, small, glabrous, oblanceolate, 11-15
<normalizedToken originalValue="×">x</normalizedToken>
5-9 mm wide; gynoecium 3-4
<normalizedToken originalValue="×">x</normalizedToken>
3-7 mm, styles 2, stigmas 2, nearly U-shape branched, both sides spirally twisted nearly one circle; ovary greenish-white, short hairy, placentation axile, 2-loculed, each placenta 2-branched;
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Peduncles</emphasis>
light-green, hairy, 15-32 cm long, ca 2 mm thick, hairy, a pair of green bracteoles often persistent near ovary;
<emphasis bold="true" italics="true" pageId="0" pageNumber="171">Fruits</emphasis>
capsule, green, densely short grayish-white pubescent, 6-10
<normalizedToken originalValue="×">x</normalizedToken>
5-8 mm, 3-winged, unequal, abaxial wing long rectangular or subtriangular, 18-28
<normalizedToken originalValue="×">x</normalizedToken>
8-10 mm; lateral wings narrow, sickle-shaped or cornice or auriculate triangular, ca. 4-8
<normalizedToken originalValue="×">x</normalizedToken>
8-10 mm. Flowering June-July. Fruiting July-October.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="171" type="etymology">
<paragraph pageId="0" pageNumber="171">Etymology.</paragraph>
<paragraph pageId="0" pageNumber="171">The specific epithet refers to the name of Shenzhen, which includes the type locality of the new species.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="171" type="distribution">
<paragraph pageId="0" pageNumber="171">Distribution and habitat.</paragraph>
<paragraph pageId="0" pageNumber="171">
The new species is only known from its type locality in Tiantou Mountain Natural Reserve of Pingshan District of Shenzhen, Guangdong Province, China (Fig.
<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Distribution of Begonia shenzhenensis (red dot) from Shenzhen, Guangdong of China." figureDoi="10.3897/phytokeys.178.66462.figure3" httpUri="https://binary.pensoft.net/fig/551952" pageId="0" pageNumber="171">3</figureCitation>
). It grows together mainly with mosses, ferns, and other herbs on shallow humus soil above the rocks along a small stream under forest canopy.
</paragraph>
<caption doi="10.3897/phytokeys.178.66462.figure3" httpUri="https://binary.pensoft.net/fig/551952" pageId="0" pageNumber="171" start="Figure 3" startId="F3">
<paragraph pageId="0" pageNumber="171">
<emphasis bold="true" pageId="0" pageNumber="171">Figure 3.</emphasis>
Distribution of
<taxonomicName authorityName="D. K. Tian &amp; X. Yun Wang" authorityYear="2021" class="Magnoliopsida" family="Apiaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia shenzhenensis" order="Cucurbitales" pageId="0" pageNumber="171" phylum="Tracheophyta" rank="species" species="shenzhenensis">
<emphasis italics="true" pageId="0" pageNumber="171">Begonia shenzhenensis</emphasis>
</taxonomicName>
(red dot) from Shenzhen, Guangdong of China.
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="0" pageNumber="171" type="conservation status">
<paragraph pageId="0" pageNumber="171">Conservation status.</paragraph>
<paragraph pageId="0" pageNumber="171">
<taxonomicName authorityName="D. K. Tian &amp; X. Yun Wang" authorityYear="2021" class="Magnoliopsida" family="Apiaceae" genus="Begonia" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Begonia shenzhenensis" order="Cucurbitales" pageId="0" pageNumber="171" phylum="Tracheophyta" rank="species" species="shenzhenensis">
<emphasis italics="true" pageId="0" pageNumber="171">Begonia shenzhenensis</emphasis>
</taxonomicName>
is only observed in its type locality with a very small population containing fewer than 50 individuals. Due to the
<normalizedToken originalValue="plant’s">plant's</normalizedToken>
relatively low ornamental value, it is possibly unlikely to be collected by plant hunters. However, there are no suitable places nearby for spreading its population. Therefore, this species should be considered as Critical Endangered (CE) according to the IUCN Red List Categories and Criteria (
<bibRefCitation author="IUCN" journalOrPublisher="Guihaia" pageId="0" pageNumber="171" publicationUrl="https://www.iucnredlist.org/resources/redlistguidelines" refId="B3" refString="IUCN, 2019. Guidelines for using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Subcommittee. https://www.iucnredlist.org/resources/redlistguidelines" title="Guidelines for using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Subcommittee." url="https://www.iucnredlist.org/resources/redlistguidelines" year="2019">IUCN 2019</bibRefCitation>
) based on the current data.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="171" type="notes">
<paragraph pageId="0" pageNumber="171">Note.</paragraph>
<paragraph pageId="0" pageNumber="171">The new species was first disovered by Mr. Xiao-Yun Wang, a plant enthusiast working at Hechang Weilai Science and Technology (Shenzhen) Co. Ltd. in Guangdong province of China. On 21 September 2019, Xiao-Yun Wang posted photos of a wild begonia from Shenzhen of Guangdong province, China. At the request of Dr. Dai-Ke Tian, the living plants were collected and introduced to Shanghai Chenshan Botanical Garden for further study. The introduced plants grow well in two plastic pots placed in a squared polymethyl box at 25 °C room temperature and bloom from November to June. On 6 June of 2020, with the help of Xiao-Yun Wang, Dr. Dai-Ke Tian and Dr. Bin Chen conducted a field survey on this species and further confirmed that it is new to science.</paragraph>
</subSubSection>
</treatment>
</document>
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