<documentID-CLB-Dataset="4283"ID-DOI="http://dx.doi.org/10.3897/phytokeys.182.71063"ID-GBIF-Dataset="bd4573aa-dd0d-4256-85c1-dbde3d72cc1c"ID-PMC="PMC8455504"ID-Pensoft-Pub="1314-2003-182-27"ID-Pensoft-UUID="3FF29E5A10635E7DA85D724B20963A96"ID-PubMed="34616209"ModsDocID="1314-2003-182-27"checkinTime="1631647591045"checkinUser="pensoft"docAuthor="Liu, Qun, Huang *, Gui-Yun, Zhang, Dai-Gui, Zhang, Jian-Wen, Deng, Tao & Li 1, Zhi-Min"docDate="2021"docId="51E31F18D526526C84F8B676EDD58ACD"docLanguage="en"docName="PhytoKeys 182: 27-38"docOrigin="PhytoKeys 182"docPubDate="2021-09-14"docSource="http://dx.doi.org/10.3897/phytokeys.182.71063"docTitle="Youngia hangii T. Deng, D. G. Zhang, Qun Liu & Z. M. Li 2021, sp. nov."docType="treatment"docVersion="6"id="3FF29E5A10635E7DA85D724B20963A96"lastPageNumber="27"masterDocId="3FF29E5A10635E7DA85D724B20963A96"masterDocTitle="Youngia hangii (Asteraceae, Crepidinae), a new species from Hubei, China"masterLastPageNumber="38"masterPageNumber="27"pageNumber="27"updateTime="1720543907787"updateUser="ExternalLinkService">
<mods:affiliationid="F45AD38D8EE3A79B974F26FEA6367B5E">School of Life Sciences, Yunnan Normal University, Kunming 650092, Yunnan, China</mods:affiliation>
<mods:affiliationid="CD6F6CA46EB814F27968F68FA19A956B">Rare Plants Research Institute of Yangtze River, Three Gorges Corporation, Yichang 443133, Hubei, China</mods:affiliation>
<mods:affiliationid="4EA66E55829BF714EF84D4E3177F6C2F">CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China</mods:affiliation>
<mods:affiliationid="D601A42B260B30C3085AB8FFCDFBE8AF">CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China</mods:affiliation>
<mods:affiliationid="3A1D143DC639A685501AD0B121445975">School of Life Sciences, Yunnan Normal University, Kunming 650092, Yunnan, China</mods:affiliation>
<taxonomicNameid="21C8D713D2E3C3A49415AAE2266DE05B"ID-CoL="8RTQQ"LSID="51E31F18-D526-526C-84F8-B676EDD58ACD"authority="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"higherTaxonomySource="treatment-meta"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii"status="sp. nov.">Youngia hangii T. Deng, D.G. Zhang, Qun Liu & Z.M. Li</taxonomicName>
<figureCitationid="ABEA106F3E506FA6391FE64546C8E1DA"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Youngia hangii T. Deng, D. G. Zhang, Qun Liu & Z. M. Li A habitat B population C habit D root E stems F, G leaves H-J capitula K, L floret (A-E, H-J Photos by D. F. Zhang F, G, K, L Photos by Qun Liu D, E, J-M HAC 001 (KUN ))."figureDoi="10.3897/phytokeys.182.71063.figure2"httpUri="https://binary.pensoft.net/fig/587057"pageId="0"pageNumber="27">2D</figureCitation>
). Stems erect, branched from the base, with sparse white simple hairs; stem base ribbed, with 1 or 2 leaves similar to basal leaves. Basal leaves crowded at the caudex base; petiole 2-3 cm long; blade oblanceolate, 6-18
2-4 cm, both surfaces short pubescent with white hairs 0.1-0.3 mm long (pubescence more evident on veins), bipinnate to pinnatifid, apical lobe halberd-shaped, apex acute-acuminate, margin deeply lobed; lateral lobes 5-10 pairs, opposite or slightly skewed, irregularly halberd-shaped (lateral lobes tapering to the base, serrate, lowermost lobes narrowly triangular), often with 1-3 pairs of triangular or oblique-ovate lobes between lateral lobes. Synflorescence corymbiform; capitula 7-10. Involucre ampullate, 3-4 mm long, 3 mm in diameter. Phyllaries in 4 rows, greyish-green; outer phyllaries 5-7, ovoid-triangular, ca. 1
1-2 mm, teeth 0.2-0.4 mm long, tube 3-4 mm; anther tube ca. 2.5 mm long; style branches ca. 0.5 mm long. Outer achenes black, fusiform, 2 mm long, apex attenuate to shortly beaked and expanded again into the pappus disc; ribs 12-14; pappus white, bristles rough, 3 mm long; inner achenes similar to the outer ones, 2.5 mm long.
<taxonomicNameid="D50500F303A86D381542F6D253B5694E"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">
<taxonomicNameid="1B0C9417556234AC08A85149280BE389"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">
<taxonomicNameid="43C46E71870B688D3BE4337AB174D490"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">
<paragraphid="68780C1EF5529EC25AA4E0B9B0D0C81E"pageId="0"pageNumber="27">The species epithet honours Prof. Hang Sun (b. 1963), a Chinese botanist who has conducted research on plant taxonomy, floristics, biogeography and evolutionary biology and inspired many people through his work. He has also given a lot of support to the plant research work in Hubei.</paragraph>
<taxonomicNameid="AAAC3DB99ECC4E20A18E7A043137F61B"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">
is known only from the type locality, Renheping in Wufeng Xian, Hubei, China; 500-1000 individuals are known along the edge of some small caves at the base of the karst hillside (Fig.
<figureCitationid="F7A0CA7EB4C627750C228A33F5BBD67F"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Youngia hangii T. Deng, D. G. Zhang, Qun Liu & Z. M. Li A habitat B population C habit D root E stems F, G leaves H-J capitula K, L floret (A-E, H-J Photos by D. F. Zhang F, G, K, L Photos by Qun Liu D, E, J-M HAC 001 (KUN ))."figureDoi="10.3897/phytokeys.182.71063.figure2"httpUri="https://binary.pensoft.net/fig/587057"pageId="0"pageNumber="27">2A, B, C</figureCitation>
are attenuated into a short beak, which is widened into the pappus disc. Several unique features including the shape, lobes and size of the leaves, the leaves with white simple hairs (Fig.
<figureCitationid="DA814C8CB74AD739B54FD4D40C4EA9A8"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Youngia hangii T. Deng, D. G. Zhang, Qun Liu & Z. M. Li A habitat B population C habit D root E stems F, G leaves H-J capitula K, L floret (A-E, H-J Photos by D. F. Zhang F, G, K, L Photos by Qun Liu D, E, J-M HAC 001 (KUN ))."figureDoi="10.3897/phytokeys.182.71063.figure2"httpUri="https://binary.pensoft.net/fig/587057"pageId="0"pageNumber="27">2E, F, G</figureCitation>
<figureCitationid="0A7EEF09FA47C8DA2AF83DBF20049F9A"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Youngia hangii T. Deng, D. G. Zhang, Qun Liu & Z. M. Li A, B capitula C floret D habit E leaf with hairs F achene (drawing by Jianing Yang)."figureDoi="10.3897/phytokeys.182.71063.figure3"httpUri="https://binary.pensoft.net/fig/587058"pageId="0"pageNumber="27">3F, G</figureCitation>
<tableCitationid="51BE882920D595A0F844FC2CA88C616C"captionStart="Table 1"captionStartId="T1"captionText="Table 1. Comparison of morphological characteristics between Youngia hangii and related species."httpUri="http://table.plazi.org/id/A9417C9A738FB428AA04481BCC5AB9AE"pageId="0"pageNumber="27"tableUuid="A9417C9A738FB428AA04481BCC5AB9AE">1</tableCitation>
<taxonomicNameid="DD6193175E20731E24C4CFB8BC844D04"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">
<taxonomicNameid="0B1D53345C48E4D74F9665D947369234"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">
<tdid="4500AB1620FCAC7460131F4E6D07ACD6"colspan="1"pageId="0"pageNumber="27"rowspan="1">oblanceolate, pinnately deeply or completely partite</td>
<tdid="FDD69A6C7239FDF950DB9EA870BE5850"colspan="1"pageId="0"pageNumber="27"rowspan="1">elliptic or oblong lanceolate, pinnately deeply or completely partite</td>
<tdid="079C1EA57B8117D7AEA5EA3737E92D23"colspan="1"pageId="0"pageNumber="27"rowspan="1">long elliptic, bipinnately deeply partite with a large apical part</td>
<tdid="30ED8A54B61CC23B8071EC3D0C84F8AD"colspan="1"pageId="0"pageNumber="27"rowspan="1">apical lobes halberd-shaped, apex acute, with a tapered tip, margin middle to deep lobed; lowest lobes narrowly triangular</td>
<tdid="ABC38C02708CA7A780135FB0BF2BB1DE"colspan="1"pageId="0"pageNumber="27"rowspan="1">apical lobes triangle, apex acute, with a tapered tip, margin serrate; lowest lobes serrate</td>
<tdid="EBE091BA23AC003EA1469D135345AE5E"colspan="1"pageId="0"pageNumber="27"rowspan="1">apical lobes elliptic, irregularly elliptic, ovate or lanceolate, apex acute, with a tapered tip, margin entire, almost entire or serrate; lowest lobes narrowly halberd</td>
<tdid="3DF3123997643DA39CC6BE3A022B92A9"colspan="1"pageId="0"pageNumber="27"rowspan="1">apical lobes triangular, apex acute, with a tapered tip, margin entire, almost entire or serrate; lowest lobes narrowly triangular</td>
<tdid="5F9C57DB4418D09F1E8C6559921D04DA"colspan="1"pageId="0"pageNumber="27"rowspan="1">with white pubescent hairs on both surfaces, especially dense on veins</td>
<tdid="8B1F3A087C0E28835E6955314C114992"colspan="1"pageId="0"pageNumber="27"rowspan="1">glabrous on both surfaces</td>
<tdid="7810CD8E751522C96BCEBBE3455DD1F3"colspan="1"pageId="0"pageNumber="27"rowspan="1">sparsely pubescent on both surfaces</td>
<tdid="1EAF72B2E4E1096991A5AB1E57BA654C"colspan="1"pageId="0"pageNumber="27"rowspan="1">glabrous on both surfaces</td>
<tdid="958497EC2DB35278784CF6590177D5A9"colspan="1"pageId="0"pageNumber="27"rowspan="1">fusiform, attenuated into a narrow neck, with a conical beak</td>
<tdid="37C32B1E90F997BBB34F979A64D71604"colspan="1"pageId="0"pageNumber="27"rowspan="1">fusiform, attenuated into a narrow neck, with a conical beak</td>
<tdid="E3CBFFC52A2B408679C3CBB1CB5C7292"colspan="1"pageId="0"pageNumber="27"rowspan="1">fusiform, attenuated into a narrow neck, without a beak</td>
<tdid="FB4576032DCA1CADDA78EC3A64D50EDA"colspan="1"pageId="0"pageNumber="27"rowspan="1">fusiform, attenuated into a narrow neck, without a beak</td>
<figureCitationid="6971498F1435D7181AC4F55C32942C1C"captionStart="Figure 1"captionStartId="F1"captionText="Figure 1. Bayesian consensus tree of Youngia hangii and related species. The BP tree is constructed, based on the combined matrix of ITS and rps 16 sequences. Numbers below branches are ML bootstraps and MP bootstraps and numbers above branches indicate Bayesian posterior probability. Youngia hangii is shown in bold."figureDoi="10.3897/phytokeys.182.71063.figure1"httpUri="https://binary.pensoft.net/fig/587056"pageId="0"pageNumber="27">1</figureCitation>
<figureCitationid="8CBEE73804D2AC6BCCF9C416719D8250"captionStart="Figure 1"captionStartId="F1"captionText="Figure 1. Bayesian consensus tree of Youngia hangii and related species. The BP tree is constructed, based on the combined matrix of ITS and rps 16 sequences. Numbers below branches are ML bootstraps and MP bootstraps and numbers above branches indicate Bayesian posterior probability. Youngia hangii is shown in bold."figureDoi="10.3897/phytokeys.182.71063.figure1"httpUri="https://binary.pensoft.net/fig/587056"pageId="0"pageNumber="27">1</figureCitation>
<taxonomicNameid="F7799FA7192A953504530E38A5AFD66E"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">
<taxonomicNameid="B6327A88ACD379F5DAD71201FEB9EC51"authorityName="T. Deng, D. G. Zhang, Qun Liu & Z. M. Li"authorityYear="2021"class="Magnoliopsida"family="Asteraceae"genus="Youngia"kingdom="Plantae"lsidName="Youngia hangii"order="Asterales"pageId="0"pageNumber="27"phylum="Tracheophyta"rank="species"species="hangii">