Five new and noteworthy species of Epidendroideae (Orchidaceae) from southwestern China based on morphological and phylogenetic evidence Author Ya, Ji-Dong https://orcid.org/0000-0003-3389-1412 Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China & Academy of Biodiversity, Southwest Forestry University, Kunming, Yunnan 650224, China Author Wang, Wan-Ting https://orcid.org/0009-0007-9822-4983 Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China & University of Chinese Academy of Sciences, Beijing 100049, China Author Liu, Yun-Long https://orcid.org/0000-0003-4650-3466 Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China Author Jiang, Hong https://orcid.org/0000-0001-6613-8588 Yunnan Laboratory for Conservation of Rare, Endangered & Endemic Forest Plants, Public Key Labotatory of the National Forestry and Grassland Administration, Yunnan Academy of Forestry and Grassland, Kunming, Yunnan 650201, China Author Han, Zhou-Dong https://orcid.org/0009-0001-9431-1349 Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China Author Zhang, Ting https://orcid.org/0000-0003-0939-8468 Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China Author Huang, Hua https://orcid.org/0000-0002-7400-5651 CAS Key Laboratory for Plant Biodiversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China Author Cai, Jie https://orcid.org/0000-0003-1627-3700 Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China Author Li, De-Zhu https://orcid.org/0000-0002-4990-724X Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China & Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, Heilongtan, Kunming, Yunnan 650201, China & CAS Key Laboratory for Plant Biodiversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China dzl@mail.kib.ac.cn text PhytoKeys 2023 2023-11-20 235 211 236 http://dx.doi.org/10.3897/phytokeys.235.111230 journal article http://dx.doi.org/10.3897/phytokeys.235.111230 1314-2003-235-211 F26452E8A301556489EFF17249A0D0E1 3. Papilionanthe motuoensis J.D.Ya & D.Z.Li sp. nov. (墨脱凤蝶兰 Mo Tuo Feng Die Lan) Figs 6 , 7A-C Diagnosis. Papilionanthe motuoensis is similar to P. uniflora (Lindl.) Garay but differs in having a glabrous pedicel and ovary (vs. glandular-pubescent). Its lateral petals are oblong-ovate (vs. oblong) with irregularly denticulate margins (vs. with undulating margins), truncate apices (vs. obtuse apices). Its labellum is white tinged with yellow (vs. uniformly white), with a subflabellate mid-lobe and a labellum base with an apically dilate to reniform claw, its apex is emarginated with an irregularly denticulate margin (vs. mid-lobe simple, oblong, apex widely cuneate). Figure 6. Papilionanthe motuoensis J.D.Ya & D.Z.Li, sp. nov. A plant B flower (dorsal view) C flower (front view) D flower (lateral view) E abaxial sepals and petals F adaxial sepals and petals G column and lip (lateral view) H column and lip (front view) I lip (front view) J lip (rip cutting) K column (lateral view) L column (front view) M anther cap N pollinarium. Photographed by J.-D. Ya. Type . China . Yunnan , Kunming , voucher from cultivated plants at Kunming Institute of Botany , CAS, 20 Oct. 2020 (flowering), J.-D. Ya BC201015 ( holotype : KUN!), plants originally collected from Tibet ( Xizang ), Linzhi City , Motuo County , 1625 m , at the edge of a subtropical, evergreen, broadleaved forest . Description. Stems pendulous, terete, to 50 cm, 2.0 mm in diam. branched, enclosed in leaf sheaths. Leaves laxly alternate, terete, 9-16 x 0.2 cm, base with amplexicaul-sheathing, apex apiculate; sheaths tubular, 2.0-2.8 cm long, glabrous. Inflorescence ca. 1.5 cm, usually 1-2-flowered; peduncle slender, ca. 1.3 cm; floral bracts ovate-triangular, 1.5 x 1.2 mm. Flowers 2.5 cm in diam. sepals and lateral petals white, mid-vein pink, labellum white tinged with yellow, its spur with a whitish and/or pink tinge, apex yellowish green. Pedicel and ovary, ca. 1.2 cm long, glabrous. Dorsal sepal ovate, ca. 1.0 x 0.5 cm, acute, 5-veined; lateral sepals oblong, slightly falcate, ca. 1.1 x 0.4 cm, acuminate, 5-veined; lateral petals oblong-ovate, 1.1 x 0.6 cm, margin irregularly denticulate, apices truncate, 7-veined; labellum adnate to column foot, 3-lobed; lateral lobes deeply bifid, unequal, linear, acute, long lobule ca. 7.0 x 2.0 mm, short lobule ca. 4.0 x 1.0 mm; mid-lobe spreading, subflabellate, ca. 4.8 x 5.0 cm, base with a claw ca. 2.2 x 2.0 mm, apical dilate to reniform, apex emarginate, margin irregularly denticulate; spur slightly curved forward, cylindrical, ca. 22.0 x 3.5 mm, narrowing towards the terminus, its interior pubescent. Column 7.0 x 3.0 mm, foot ca 5.2 mm, with narrowly and entire wings decurrent to foot; anther cap galeate with a acuminate apex, 2.0 x 2.5 mm; pollinia 2, subglobose, ca. 1.0 mm in diameter, waxy, porate, attached by a stipe to a broad cellular viscidium. Figure 7. A-C Papilionanthe motuoensis D-F Papilionanthe uniflora (Nepal). Photographed by: A-C J.-D. Ya D-F Bhakta Bahadur Raskoti. Phenology. Observed flowering in October. Etymology. The specific epithet " Papilionanthe motuoensis " refers to the type locality Motuo (Medog) County. Additional specimens examined. Tibet (Xizang), Linzhi City, Motuo County , Bangxin Xiang, 1330 m , from subtropical, evergreen, broadleaved forest. Oct. 2019 , M.-K. Li and W. Wang 2019343 ( paratypes , Herbarium of Tibet Agricultural and Animal Husbandry University, No. 8 Xueyuan Road , Bayi District , Nyingchi , Tibet ). P. uniflora : Nepal . Gosain Than, N . Wallich no. 1993 (K001114863!); India , Mao, C.B . Clarke 41790 (K000891405!) Distribution and habitat.: The new epiphytic species was found only in Motuo County, Tibet (Xizang), China, growing on limbs in a subtropical, evergreen, broadleaved forest at elevations of 1300-1650 m.