{"id":10858,"date":"2020-10-03T06:44:00","date_gmt":"2020-10-03T06:44:00","guid":{"rendered":"https:\/\/science.msu.ac.th\/en\/?p=10858"},"modified":"2022-11-17T07:39:14","modified_gmt":"2022-11-17T07:39:14","slug":"a-new-species-of-dischidia-apocynaceae-asclepiadoideae-from-north-eastern-thailand","status":"publish","type":"post","link":"https:\/\/science.msu.ac.th\/en\/a-new-species-of-dischidia-apocynaceae-asclepiadoideae-from-north-eastern-thailand\/","title":{"rendered":"A new species of Dischidia<\/i> (Apocynaceae, Asclepiadoideae) from North-eastern Thailand"},"content":{"rendered":"\n

Assistant Professor Dr Wilawan Promprom<\/strong> and Assistant Professor Dr Wannachai Chatan,<\/strong> researchers from the Department of Biology, Faculty of Science, Mahasarakham University, discovered a new species of Dischidia (Apocynaceae, Asclepiadoideae) from north-eastern Thailand.<\/p>\n\n\n\n

Abstract:<\/strong> Dischidia phuphanensis<\/em>\u00a0 Chatan\u00a0 &\u00a0 Promprom,\u00a0 a\u00a0 new\u00a0 species\u00a0 from\u00a0 north-eastern\u00a0 Thailand,\u00a0 is\u00a0 described\u00a0 and illustrated. The new species is similar to D. tonkinensis<\/em> Costantin, but is distinguished by the shape of its leaves, the apices of the staminal corona lobes, the colour of the corolla and the absence of a corolline corona. The distinguishing characters of similar species are discussed. A key for the identification of those species in Thailand without pitcher-like leaves is provided.<\/p>\n\n\n\n

Dischidia phuphanensis<\/em><\/strong> Chatan & Promprom, sp. nov.<\/em><\/strong><\/p>\n\n\n\n

Diagnosis<\/strong>: Dischidia phuphanensis<\/em> is most similar to D. tonkinensis<\/em>, but the new species differs from the latter in its elliptic or narrowly elliptic or slightly oblanceolate leaves (leaves in D. tonkinensis<\/em> are ovate to ovate elliptic, rarely obovate), apex of corona lobes obtuse (with tips pointing downward in D. tonkinensis<\/em>), yellow base of the corolla tube and light yellow or white apices of the lobes (white or orange-yellow corolla tube and lobes in D.\u00a0 tonkinensis<\/em>) and the absence of a corolline corona (corolline corona present in D. tonkinensis<\/em>).<\/p>\n\n\n\n

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Dischidia\u00a0phuphanensis. A Plant climbing on rock B plant climbing on branches of shrub 2\u20133 m tall C branches and leaves D Inflorescence E follicle (nearly mature) F dehiscent follicle. Photographed<\/em> by Wannachai Chatan from W. Chatan<\/em> 2489 (A\u2013D) and W. Chatan<\/em> 2904 (E, F).<\/figcaption><\/figure><\/div>\n<\/div>\n\n\n\n
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Dischidia phuphanensis<\/em>. A<\/strong> Branch with leaves and inflorescences B<\/strong> bud C<\/strong> flower D<\/strong> dissected flower with half of corolla removed E<\/strong> calyx from abaxial side F<\/strong> gynostegium (side view), with coronal lobes removed G<\/strong> gynostegium (from above) H<\/strong> pollinarium I<\/strong> pistil J<\/strong> pistil (style-head removed) K<\/strong> follicle L<\/strong> seed A\u2013J<\/strong> drawn by Wannachai Chatan from W. Chatan 2489<\/em>, and K, L<\/strong> from W. Chatan 2904.<\/strong><\/figcaption><\/figure><\/div>\n<\/div>\n<\/div>\n\n\n\n
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Distribution of Dischidia phuphanensis<\/em> (black triangle) in Phu Pha Yol National Park, Sakon Nakhon Province, Thailand.<\/figcaption><\/figure><\/div>\n<\/div>\n\n\n\n
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Phenology:<\/strong> Flowering in July\u2013September and fruiting in Aug\u2013December.<\/p>\n\n\n\n

Distribution:<\/strong> The new species is endemic to Thailand and is known only from the type locality, Phu Pha Yol National Park, Sakon Nakhon Province, north-eastern Thailand.<\/p>\n\n\n\n

Ecology<\/strong>: This new species grows in both slightly open and in shaded areas in mixed deciduous forests at an elevation of 300\u2013400 m.<\/p>\n\n\n\n

Vernacular name:<\/strong> Thao Rag Noi. (\u0e40\u0e16\u0e32\u0e23\u0e31\u0e01\u0e19\u0e49\u0e2d\u0e22)<\/p>\n<\/div>\n<\/div>\n\n\n\n

Etymology:<\/strong> The specific epithet of Dischidia phuphanensis<\/em> refers to its type locality, the Phuphan mountain range.<\/p>\n\n\n\n

Preliminary conservation status:<\/strong> One population of Dischidia phuphanensis was found at the type locality in Phu Pha Yol National Park, Sakon Nakhon Province, northeast Thailand.\u00a0 It is estimated to number fewer than 250 mature individuals.\u00a0 Therefore, it should be considered \u201cEndangered (EN)\u201d according to the IUCN criteria D (IUCN 2017).<\/p>\n\n\n\n

Promprom W, Chatan W (2020) A new species of Dischidia<\/em> (Apocynaceae, Asclepiadoideae) from North-eastern Thailand. PhytoKeys 144: 23\u201330. https:\/\/doi.org\/10.3897\/phytokeys.144.47977<\/p>\n","protected":false},"excerpt":{"rendered":"

Assistant Professor Dr Wilawan Promprom and Assistant P […]<\/p>\n","protected":false},"author":2,"featured_media":10866,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,118,128,6],"tags":[147,20,21,132,18],"class_list":["post-10858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biological-sciences","category-economic-plant-and-animal-and-its-applications","category-research","category-research-highlight","tag-marsdenieae","tag-new-discovery","tag-new-species","tag-taxonomy","tag-thailand"],"_links":{"self":[{"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/posts\/10858","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/comments?post=10858"}],"version-history":[{"count":4,"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/posts\/10858\/revisions"}],"predecessor-version":[{"id":10865,"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/posts\/10858\/revisions\/10865"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/media\/10866"}],"wp:attachment":[{"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/media?parent=10858"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/categories?post=10858"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/science.msu.ac.th\/en\/wp-json\/wp\/v2\/tags?post=10858"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}