Bulbophyllum versicolor (Orchidaceae, Malaxideae), a new species from Yunnan, China: evidence from morphology and molecular analyses Author Zhou, Zhuang 0000-0002-3894-2576 Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou 325005, China & Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China & zhuangchow @ 126. com; https: // orcid. org / 0000 - 0002 - 3894 - 2576 Author Wu, Peng-Yu 0000-0002-8253-7236 School of Biological and Chemical Engineering, Nanyang Institute of Technology, Nanyang, 473004, China & 18771068351 @ 163. com; https: // orcid. org / 0000 - 0002 - 8253 - 7236 Author Lin, Ya-Jun 0000-0002-2228-4513 Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China & 1552672265 @ qq. com; https: // orcid. org / 0000 - 0002 - 2228 - 4513 1552672265@qq.com Author Zhao, Zhuang 0000-0002-8021-3879 Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China & fafuzzhuang @ 163. com; https: // orcid. org / 0000 - 0002 - 8021 - 3879 Author Fu, Xiong-De Tu Shuang-Bin Author Ying, Zhen 0000-0002-5908-1656 Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou 325005, China & yingzhen 0908 @ 126. com; https: // orcid. org / 0000 - 0002 - 5908 - 1656 Author Liu, Zhong-Jian 0000-0003-4390-3878 Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural Sciences, Wenzhou 325005, China & Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China & zjliu @ fafu. edu. cn; https: // orcid. org / 0000 - 0003 - 4390 - 3878 zjliu@fafu.edu.cn text Phytotaxa 2021 2021-12-21 528 4 247 254 journal article 2888 10.11646/phytotaxa.528.4.3 47a8dfce-0203-4f18-b330-9fc2794c4736 1179-3163 5794910 Bulbophyllum versicolor Z.Zhou, P.Y.Wu & Z.J.Liu , sp. nov. ( Øffl卷瓣兰 ; Figs 2 , 3 ) Type :— China , Malipo , Yunnan , epiphytic on branches in forests, 1300 m , 12 Oct 2017 , cultivated and flowered in Wenzhou , 30 Sep 2020 , Zhou 2020103001 ( holotype : ZM !) . This new species is similar to B. japonicum , but it differs by its leaf size (3.0–6.0 vs. 3.0– 4.5 cm long), inflorescence shape (raceme 4.0– 6.5cm long, densely 5–14 flowered vs. umbel 2–3 cm long, 2–4 flowered), flower colour (whitish green or pale yellowish green, base purplish red vs. purplish red) and lip size (5.5–6.0 vs. 2.0 mm long). Epiphytic herbs with a creeping rhizome. Pseudobulbs erect, 4.5–19.0 mm apart, cylindric or narrowly fusiform, 5.0–11.0 mm long, 2.5–4.5 mm in diam., green or yellowish green, slightly angular with longitudinal furrows during dry seasons, with a terminal leaf. Leaves lanceolate, 30–60 × 3–5 mm , apex acute, base tapered to terete petiole, entire. Scape from base of pseudobulb, erect, 4.0– 6.5 cm , slender; racemose 5–14 flowered; peduncle 1.0– 1.5 mm in diam., with 2 tubular sheaths 5 mm ; floral bracts lanceolate, ca. 3 mm . Pedicel and ovary ca. 5 mm . Flowers apex whitish green or pale yellowish green, base purplish red. Dorsal sepal oblong, ca. 3 × 1 mm , pale purple, apex acute, apex dark purple, margin sometimes with denticles, triveined. Lateral sepals obliquely lanceolate, 2.5 cm , twisted near base, with their upper and lower edges often loosely connivent to each other, apex acuminate. Petals semiovate or ovate obliquely, 2.2–3.0 × 1.5 mm , pale purple, apex obtuse, with purplish red spots, triveined, margin entire. Lip recurved, ligulatelanceolate, with finely papillate, 5.5–6.0 × 2.0– 2.5 mm , reddish maroon, grooved at base, apex obtuse, attached to end of column foot by a mobile joint. Column quadrangular with tapering base, ca. 4.0 mm long; column foot hookedincurved, ca. 3.5 mm long, reddish maroon to purplish red. Anther cap hemispherical, pale yellow. Pollinia 4, 2 in each pair. Phenology:— Flowering July–August. Etymology:— Refering to a variety of flower colours. Distribution and habitat:— So far only known from the type locality where it is epiphytic on trees at 1300 m in evergreen, broad-leaved forests. Conservation status:— So far, four populations have been discovered. The number of mature individuals in each population is ten plants. The extent of suitable habitat is continuing to decline due to tree felling and land reclamation. According to the World Conservation Union Red List Categories and Criteria version 3.1 ( IUCN, 2001 ), we suggest that the unofficial conservation status of this new species should be CR (critically endangered).