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 47. Herminium tibeticum X.H. Jin, Schuit. & Raskoti sp. nov. Fig. 15 Type . CHINA . Tibet , Medog , 52 km region of the road from Bomi to Motuo , 3600-3700 m , 28.08.2012 , Jin X.H. , Jin W.T. and Xu S.Z. , 13185 (PE) . Figure 15. Herminium tibeticum . A Flowering plant B Flower (side view) C Flower spread (front view) D Dorsal sepal, lateral sepal and petal E Lip F Section of ovary with column G Floral bract H Column with stigma (front view) I Anther cap, auricles and viscidium. Diagnosis . Herminium tibeticum is similar to Herminium pygmaeum and H. josephi , but differs from the former in having strongly falcate petals and a lip with a callus; from the latter in having a 3-lobed and cuneate lip. Description. Plant 13-16 cm tall. Tubers subglobose, 4-8 x 4-6 mm, with slender roots. Stem with tubular sheaths at base, and often 1 or rarely 2-leaved. Leaves cauline, lanceolate, 4.0-5.0 x 0.8-1.0 cm, apex acute, base sheathing. Peduncle 7-8 cm, slender, without peduncle-scales; rachis 2.5-5.5 cm, with five to several subsecund flowers; floral bracts ovate,1-2 x 0.5-1.0 mm, about equal to the pedicel, apex acute. Flowers drooping, greenish, 4-5 mm across, ovary fusiform, shortly pedicellate, slightly arcuate, 4-7 mm long, ridged, apex strongly beaked. Dorsal sepal ovate, 3.0 x 1.9 mm, 1-veined, apex sub-obtuse; lateral sepals spreading, ovate, oblique, 3.0 x 1.3 mm, apex obtuse. Petals lanceolate, falcate, 3.0-5.0 x 1.0-1.5 mm, 1-veined, middle portion crenulate, apex acute. Lip cuneate, apiculate, 5.5-6.0 x 1.5-2.5 mm, base saccate, concave, with two longitudinal 1.9 mm long calli, 3-nerved, shallowly 3-lobed; lateral lobes triangular, smaller than the midlobe, 1.0 x 0.4 mm, crenulate, apex obtuse; midlobe narrowly triangular,1.2 x 1.0 mm, apex sub-obtuse. Column ca. 1.4 mm long; stigma transverse, ca. 2.8 mm long, rostellum 0.5 mm, three lobed, mid-lobe larger than the lateral lobes; auricle ca. 0.6 mm long; pollinia 1.2 mm, globose; viscidia globose. Flowering time. July. Distribution. Endemic to China. Habitat. Terrestrial in grassland on open slopes in evergreen forest at elevations of 3600-3700 m. Etymology. Named for Tibet, origin of type. Notes. Herminium tibeticum is most similar to Herminium pygmaeum Renz in petal and lip shape; it differs from the latter in having strongly falcate petals, and a lip with two parallel longitudinal calli at the base.