A taxonomic revision of Herminium L. (Orchidoideae, Orchidaceae) Author Raskoti, Bhakta Bahadur State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Author Schuiteman, Andre Science Directorate, Royal Botanical Gardens, Kew, Richmond, Surrey TW 9 3 AB, U. K. Author Jin, Wei-Tao State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Author Jin, Xiao-Hua State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China & Southeast Asia Biodiversity Research Institute, Chinese Academy of Science, Yezin, Nay Pyi Taw 05282, Myanmar xiaohuajin@ibcas.ac.cn text PhytoKeys 2017 2017-04-19 79 1 74 http://dx.doi.org/10.3897/phytokeys.79.11215 journal article http://dx.doi.org/10.3897/phytokeys.79.11215 1314-2003-79-1 254BFFC9FF9A3360AA0D4550FF8FFFEE 576376 4. Herminium albovirens (Renz) X.H. Jin, Schuit., Raskoti & L.Q. Huang, Cladistics 2015. Basionym. Bhutanthera albovirens Renz, Edinburgh J. Bot. 58: 102. 2001. Type . BHUTAN . Tongsa district , Thita Tso , Rinchen Chu , 13. 07. 1937 . Ludlow and Sherriff, 3441 ( Holotype : BM! [BM000074511]) . Description. Plant 4-6 cm tall. Tuber globose, 0.5-1 x 0.4-0.5 cm. Stem with 2 leaves and tubular sheaths. Leaves subopposite, lanceolate to ovate-lanceolate, subacute, 1-1.9 x 0.4-1.1 cm. Inflorescence terminal, 1-2-flowered; floral bract lanceolate, acuminate, 3 x 0.5-1mm. Flowers white, sepals and petals yellowish green, 0.8-1cm across; pedicel and ovary fusiform, 6-8 mm long. Dorsal sepal ovate, obtuse, 5 x 3.5 mm; lateral sepals obliquely ovate, falcate, subacute, 6-6.5 x 3-4 mm. Petals obovoid, rounded, 3-5 x 2.5-4 mm. Lip deeply 3-lobed, spurred, base quadrate, 0.5 x 2 mm (wide); lateral lobes oblong, rounded, 3.5-4 x 0.8mm; mid-lobe oblong, rounded, 5 x 0.6 mm; spur conical, globose, rounded, curved forwards, 2-3 x 0.8-1 mm. Column short, broad, 1 mm tall; anther-cap long-beaked, 1.5-1.9 mm long. Flowering time. July-September. Habitat. Terrestrial on alpine cliffs and in rock crevices at elevations of 4270-4720 m. Distribution. Endemic to Bhutan. Specimen examined. BHUTAN: Upper Kulong Chi district, Shingbe, 17.09.1949, Ludlow & Sherriff, 21196 (BM! [BM000074510]). Note. Our description is based on Pearce and Cribb (2001) and an image of the holotype. Herminium albovirens is similar to H. albosanguineum , but differs in having yellowish-green sepals, yellowish-green to white petals and a white lip. More material of these species is needed to assess their variability.