<documentid="A809B0D271C1FA8FD15CDF02FC621BBF"ID-CLB-Dataset="300714"ID-DOI="10.11646/phytotaxa.645.2.7"ID-GBIF-Dataset="fa21a77b-e952-4324-9155-5632d1dea0cb"ID-ISSN="1179-3163"ID-Zenodo-Dep="13214994"IM.bibliography_approvedBy="felipe"IM.illustrations_approvedBy="felipe"IM.materialsCitations_approvedBy="felipe"IM.tables_requiresApprovalFor="GgImagineBatch"IM.taxonomicNames_approvedBy="felipe"IM.treatments_approvedBy="felipe"checkinTime="1722597068313"checkinUser="felipe"docAuthor="Nguyen, Khang Sinh, Averyanov, Leonid V. & Lin, Che Wei"docDate="2024"docId="03F787FC8614FF95FF19FDAE2747FE81"docLanguage="en"docName="phytotaxa.645.2.7.pdf"docOrigin="Phytotaxa 645 (2)"docSource="http://dx.doi.org/10.11646/phytotaxa.645.2.7"docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article"docStyleId="96748F8F1B6C902996E134952A3A36B9"docStyleName="Phytotaxa.2014-.journal_article"docStyleVersion="13"docTitle="Primulina hoangmongii K. S. Nguyen, Aver. & C. W. Lin, sp. nov."docType="treatment"docVersion="2"lastPageNumber="184"masterDocId="FFCEFF848615FF90FF91FFDA2459FF81"masterDocTitle="Primulina hoangmongii (Gesneriaceae), a new species from northern Vietnam"masterLastPageNumber="185"masterPageNumber="179"pageNumber="180"updateTime="1722807694112"updateUser="ExternalLinkService"zenodo-license-figures="UNSPECIFIED"zenodo-license-treatments="UNSPECIFIED">
<mods:affiliationid="FA24C54C193AA0CA91334DD9CF03A143">Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi- 10072, Vietnam & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi- 10072, Vietnam</mods:affiliation>
<mods:affiliationid="7534D4B0194D89CF51ADBD43864E44A5">Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov Str., 2, 197376 St. Petersburg, Russia</mods:affiliation>
<mods:affiliationid="5F6C0D927F872DEDAF06B92E41D9FA9B">Herbarium of Taiwan Forestry Research Institute, Taiwan Forestry Research Institute, No. 53, Nan-Hai Road, Taipei 100, Taiwan</mods:affiliation>
<taxonomicNameid="4C5E4D698614FF91FF19FDAE26A6FD0F"ID-CoL="CDW4N"authority="K.S.Nguyen, Aver. & C.W.Lin"authorityName="K. S. Nguyen, Aver. & C. W. Lin"box="[136,767,628,655]"class="Magnoliopsida"family="Gesneriaceae"genus="Primulina"kingdom="Plantae"order="Lamiales"pageId="1"pageNumber="180"phylum="Tracheophyta"rank="species"species="hoangmongii"status="sp. nov.">
<figureCitationid="13652A6F8614FF91FCFCFDAE27E2FD0F"box="[877,955,628,654]"captionStart="FIGURE 1"captionStartId="2.[136,229,1947,1969]"captionTargetBox="[201,1376,187,1918]"captionTargetId="figure-23@2.[163,1423,172,1940]"captionTargetPageId="2"captionText="FIGURE 1. Primulina hoangmongii K.S.Nguyen, Aver. & C.W.Lin. A. Habit. B, B'. Portion of leaf, adaxial and abaxial surfaces. C, C'. Bracts, C''. bracteole. D. Flower, front view. E. Dissected and flattened corolla, showing stamens and staminodes. F. Stamens. G. Staminodes. H. Calyx lobes. I. Pistil. J. Stigma. All drawn from the holotype, Hoang Van Mong & K.S. Nguyen, YB-LY 003 by Che-Wei Lin."figureDoi="http://doi.org/10.5281/zenodo.13214996"httpUri="https://zenodo.org/record/13214996/files/figure.png"pageId="1"pageNumber="180">Figs. 1</figureCitation>
<figureCitationid="13652A6F8614FF91FC4FFDAE27B4FD0F"box="[990,1005,628,654]"captionStart="FIGURE 2"captionStartId="3.[136,234,1866,1888]"captionTargetBox="[177,1410,190,1842]"captionTargetId="figure-18@3.[177,1410,190,1842]"captionTargetPageId="3"captionText="FIGURE 2. Primulina hoangmongii K.S.Nguyen, Aver. & C.W.Lin. A, B. Habitat and habit. C. Flattened flowering plant. D. Portion of leaf, adaxial surface, showing densely appressed strigose or puberulous. E. Portion of leaf, abaxial surface. F. Corolla, front view, view from above, and side views. G. Bracts and bracteoles. H. Stigma. I. Basal portion of pistil, disc and calyx lobes. J. Dissected and flattened corolla, showing stamens and staminodes. K. Pistil and calyx, also showing cross section of ovary. L. Stamens. M. Staminodes. Photos A–B by H.V. Mong, in the locus classicus (Yen Bai Province), C–M by K.S. Nguyen, from specimen used for preparation of the holotype, Hoang Van Mong & K.S. Nguyen, YB-LY 003. Photo correction and design by K.S. Nguyen."figureDoi="http://doi.org/10.5281/zenodo.13214998"httpUri="https://zenodo.org/record/13214998/files/figure.png"pageId="1"pageNumber="180">2</figureCitation>
<collectingRegionid="499AF8088614FF91FEA6FD1A25BCFD57"box="[311,485,704,726]"country="Vietnam"name="Yen Bai"pageId="1"pageNumber="180">Yen Bai Province</collectingRegion>
: Luc Yen District, remnants of primary evergreen broad-leaved forest at an elevation of
<collectionCodeid="ED4FAE2F8614FF91FC3CFCD227E2FC9C"box="[941,955,776,797]"country="Sweden"lsid="urn:lsid:biocol.org:col:15668"name="Department of Botany, Swedish Museum of Natural History"pageId="1"pageNumber="180"type="Herbarium">S</collectionCode>
<collectionCodeid="ED4FAE2F8614FF91FB78FCD2214AFC9C"box="[1257,1299,776,797]"country="Viet Nam"lsid="urn:lsid:biocol.org:col:13708"name="National Center for Natural Sciences and Technology"pageId="1"pageNumber="180"type="Herbarium">HN</collectionCode>
is well recognized by its suborbicular leaves, large, attractive, bright yellow flowers, and ligulate, entire stigma. It superficially resembles
<taxonomicNameid="4C5E4D698614FF91FDD5FC8A2722FCE4"authority="B. Pan & Li H. Yang"authorityName="B. Pan & Li H. Yang"box="[580,891,848,870]"class="Magnoliopsida"family="Gesneriaceae"genus="Primulina"kingdom="Plantae"order="Lamiales"pageId="1"pageNumber="180"phylum="Tracheophyta"rank="species"species="albicalyx">
<bibRefCitationid="EFCF4B1B8614FF91FC0AFC8A20D3FCE4"author="Yang, L. H. & Pan, B."box="[923,1162,848,869]"pageId="1"pageNumber="180"pagination="311 - 317"refId="ref3847"refString="Yang, L. H. & Pan, B. (2017) Primulina albicalyx (Gesneriaceae), a new species from a karst area in Guangxi, China. Willdenowia 47 (3): 311 - 317. https: // doi. org / 10.3372 / wi. 47.47312"type="journal article"year="2017">Yang & Pan (2017: 312)</bibRefCitation>
with its broadly ovate rosette leaves, appressed to substrate, and light yellowish corolla. However, the new species clearly differs in its linear to narrowly-lanceolate bracts (vs. narrowly ovate to ovate) 8–12 ×
), green calyx (vs. white), rich yellow corolla (vs. pale yellowish), base of the upper lip flat, thin, and rich pure yellow (vs. swelling between lobes, yellow-brownish), and a ligulate, entire stigma (vs. deltoid, 2-lobed).
in diameter, transversely elliptic in cross section, slightly grooved adaxially, densely puberulous or hirsute with white hispid hairs; leaf blade succulent, suborbicular or broadly ovate, 8–12 ×
, adaxially grassy green, puberulous with appressed whitish or light brownish strigose hairs, abaxial surface light green to almost white, strigose and puberulous, with dense hispid hairs along veins, apex rounded to obtuse, at base rounded to subcordate, sometimes slightly decurrent, margin entire, slightly down recurved, lateral veins 4–6 on each side of median vein, flat or slightly impressed adaxially, prominent abaxially.
in diameter; limb distinctly 2-lipped; adaxial lip 2-lobed to over the middle (almost two third of its length), slightly obliquely ovate to crescentshaped, rounded at apex, 9–12 ×
long, twisted at lower third, sparsely hairy with translucent glandular hispid hairs, more dense in the upper half; anthers pale yellowish to almost white, fusiform to ellipsoid, 3–4 ×
<taxonomicNameid="4C5E4D698617FF92FE97F84027F1F831"authority="K. S. Nguyen, Aver. & C. W. Lin. A. Habit. B"box="[262,936,1946,1969]"class="Magnoliopsida"family="Gesneriaceae"genus="Primulina"kingdom="Plantae"order="Lamiales"pageId="2"pageNumber="181"phylum="Tracheophyta"rank="species"species="hoangmongii">
<emphasisid="B92AEAF88617FF92FCEAF83E216BF879"box="[891,1330,2019,2041]"italics="true"pageId="2"pageNumber="181">Hoang Van Mong & K.S. Nguyen, YB-LY 003</emphasis>
<taxonomicNameid="4C5E4D698616FF93FE99F89027F2F8E1"authority="K. S. Nguyen, Aver. & C. W. Lin. A, B. Habitat"authorityName="K. S. Nguyen, Aver. & C. W. Lin. A, B. Habitat"box="[264,939,1866,1888]"class="Magnoliopsida"family="Gesneriaceae"genus="Primulina"kingdom="Plantae"order="Lamiales"pageId="3"pageNumber="182"phylum="Tracheophyta"rank="species"species="hoangmongii">
Staminodes. Photos A–B by H.V. Mong, in the locus classicus (Yen Bai Province), C–M by K.S. Nguyen, from specimen used for preparation of the holotype,
<emphasisid="B92AEAF88616FF93FF19F8252665F792"box="[136,572,2046,2068]"italics="true"pageId="3"pageNumber="182">Hoang Van Mong & K.S. Nguyen, YB-LY 003</emphasis>
<collectingRegionid="499AF8088611FF94FEABFF19265AFF5D"box="[314,515,194,221]"country="Vietnam"name="Yen Bai"pageId="4"pageNumber="183">Yen Bai Province</collectingRegion>
). It grows on shaded vertical rocks or steep slopes of karstic limestone hills covered by evergreen broad-leaved forest at elevations of 150–350 meters above sea level. The plant flowers in late December until early February.
—The new species is currently only found in 3 close locations of Luc Yen District. Its extent of occurrence (EOO) and area of occupancy (AOO) are currently estimated as less than
, respectively. According to available data, the number of mature plants observed in the wild is not more than 100 individuals. The distribution range of this species is not covered by any protected area, and
IUCN) and severe threats, the new species is preliminarily assessed as Critically Endangered (CR) B1ab(ii,iii,v) + B2ab(ii,iii,v). Nevertheless, as for other newly described taxa with an almost punctiform or very limited distribution, provisionally assessed as CR (e.g.,
<bibRefCitationid="EFCF4B1B8611FF94FEEFFDA9275FFD0D"author="Wagensommer, R. P. & Venanzoni, R."box="[382,774,626,653]"pageId="4"pageNumber="183"pagination="252 - 262"refId="ref3604"refString="Wagensommer, R. P. & Venanzoni, R. (2021) Geranium lucarinii sp. nov. and re-evaluation of G. kikianum (Geraniaceae). Phytotaxa 489 (3): 252 - 262. https: // doi. org / 10.11646 / phytotaxa. 489.3.2"type="journal article"year="2021">Wagensommer & Venanzoni 2021</bibRefCitation>
,
<bibRefCitationid="EFCF4B1B8611FF94FC83FDA827B6FD0D"author="Zavatin, D. A. & Ramos, R. & Watanabe, M. T. C. & Pedrosa, L. G. & Lirio, E. J."box="[786,1007,626,652]"pageId="4"pageNumber="183"pagination="189 - 201"refId="ref3901"refString="Zavatin, D. A., Ramos, R., Watanabe, M. T. C., Pedrosa, L. G. & Lirio, E. J. (2023) A new species of Mollinedia (Monimiaceae, Laurales) from the Quadrilatero Ferrifero, Brazil. PhytoKeys 234: 189 - 201. https: // doi. org / 10.3897 / phytokeys. 234.109804"type="journal article"year="2023">
), it will be necessary collecting further data on distribution, population size, and threats, and defining the appropriate strategies for the long-term conservation of the species.
), but surely differs in several characters indicated in the diagnosis. It also exhibits some affinities with
<taxonomicNameid="4C5E4D698611FF94FA06FCFD2683FCE5"authority="(Merrill 1918: 156) Mich. Moller & A. Weber"authorityName="Mich. Moller & A. Weber"baseAuthorityName="Merrill"baseAuthorityPageNumber="156"baseAuthorityYear="1918"class="Magnoliopsida"family="Gesneriaceae"genus="Primulina"kingdom="Plantae"order="Lamiales"pageId="4"pageNumber="183"phylum="Tracheophyta"rank="species"species="swinglei">
<bibRefCitationid="EFCF4B1B8611FF94FF62FC9025E3FCE4"author="Merrill, E. D."box="[243,442,842,869]"pageId="4"pageNumber="183"pagination="123 - 161"refId="ref3360"refString="Merrill, E. D. (1918) Notes on the flora of Loh Fau Mountain, Kwangtung province, China. The Philippine Journal of Science, section C. Botany 13: 123 - 161."type="journal article"year="1918">Merrill 1918: 156</bibRefCitation>
) Mich.Möller & A.Weber
</taxonomicName>
in
<bibRefCitationid="EFCF4B1B8611FF94FD6BFC90205CFCE4"author="Weber, A. & Middleton, D. J. & Forrest, A. & Kiew, R. & Lim, C. L. & Rafidah, A. R. & Sontag, S. & Triboun, P. & Wei, Y. G. & Yao, T. L. & Moller, M."box="[762,1029,842,869]"pageId="4"pageNumber="183"pagination="767 - 790"refId="ref3656"refString="Weber, A., Middleton, D. J., Forrest, A., Kiew, R., Lim, C. L., Rafidah, A. R., Sontag, S., Triboun, P., Wei, Y. G., Yao, T. L. & Moller, M. (2011) Molecular systematics and remodelling of Chirita and associated genera (Gesneriaceae). Taxon 60 (3): 767 - 790. https: // doi. org / 10.1002 / tax. 603012"type="journal article"year="2011">
in its few-flowered cymes with small, linear bracts and pistil with a ligulate, entire stigma. However, significant disparities exist between the three species mentioned, such as lamina texture as well as corolla size and color. A detailed comparison of the three
<tableCitationid="C6DC03518611FF94FE11FC6C258DFC51"box="[384,468,950,976]"captionStart="TABLE 1"captionStartId="4.[136,224,1024,1048]"captionText="TABLE 1. Comparison of morphological characters of Primulina hoangmongii, P. albicalyx, and P. swinglei."pageId="4"pageNumber="183">Table 1</tableCitation>
<taxonomicNameid="4C5E4D698611FF94FB0CFBDB214AFB99"authorityName="Mich. Moller & A. Weber"baseAuthorityName="Merrill"baseAuthorityYear="1918"box="[1181,1299,1024,1048]"class="Magnoliopsida"family="Gesneriaceae"genus="Primulina"kingdom="Plantae"order="Lamiales"pageId="4"pageNumber="183"phylum="Tracheophyta"rank="species"species="swinglei">P. swinglei</taxonomicName>
<thid="76BF5DD48611006FFF01FB5A25ECFB6D"box="[144,437,1152,1260]"gridcol="0"gridrow="2"pageId="4"pageNumber="183">texture base adaxial indumentum</th>
<tdid="76BF5DD48611006FFE71FB5A2750FB6D"box="[480,777,1152,1260]"gridcol="1"gridrow="2"pageId="4"pageNumber="183">succulent rounded to subcordate appressed strigose or puberulous</td>
<tdid="76BF5DD48611006FFCBDFB5A2028FB6D"box="[812,1137,1152,1260]"gridcol="2"gridrow="2"pageId="4"pageNumber="183">succulent cuneate to broadly cuneate appressed puberulous</td>
<tdid="76BF5DD48611006FFB19FB5A21C5FB6D"box="[1160,1436,1152,1260]"gridcol="3"gridrow="2"pageId="4"pageNumber="183">herbaceous cuneate to rounded or truncate puberulous</td>
<tdid="76BF5DD48611006FFE71FADF2750FABE"box="[480,777,1285,1343]"gridcol="1"gridrow="3"pageId="4"pageNumber="183">strigose and puberulous; densely hispid-hirsute along veins</td>
<tdid="76BF5DD48611006FFCBDFADF2028FABE"box="[812,1137,1285,1343]"gridcol="2"gridrow="3"pageId="4"pageNumber="183">glabrescent; puberulous along veins</td>
<tdid="76BF5DD48611006FFCBDF8DD2028F8C0"box="[812,1137,1799,1857]"gridcol="2"gridrow="8"pageId="4"pageNumber="183">swelling between lobes, brownish yellow</td>
, possessing high horticultural potential because of its succulent, glaucous leaves arranged into compact rosettes alongside its large, attractive, rich yellow, fragrant flowers.
