A new synonym of Ptilagrostis yadongensis and a new record of Stipa bhutanica to the flora of China (Poaceae) Author Zhang, Zhong-Shuai State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China & University of Chinese Academy of Sciences, Beijing 100049, China. Author Zhu, Xiang-Yun State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Author Li, Ling-Lu State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China & University of Chinese Academy of Sciences, Beijing 100049, China. Author Jiang, Shan-Wen State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China & University of Chinese Academy of Sciences, Beijing 100049, China. Author Chen, Wen-Li State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China text Phytotaxa 2016 2016-08-26 272 1 94 96 http://dx.doi.org/10.11646/phytotaxa.272.1.7 journal article 10.11646/phytotaxa.272.1.7 1179-3163 13661729 Stipa bhutanica Noltie (1999: 289) Type:— BHUTAN . Ha: W side of Chelai La, 29 September 1998 , H . J . Noltie, N . Pradhan, Sherub & T . Wangdi 349 ( holotype E , isotype THIM ). = Ptilagrostis macrospicula Cai (2003: 2018 , p.p. incl. Qinghai-Xizang Exped. 74–2674 ). Perennial, forming small dense tussocks. Culms 8–54 cm tall, ca. 0.7–1.5 mm in diam., 2-noded. Leaf blades setaceous, 6–28 cm long; culm ligules lanceolate, 2–7.5 mm long. Panicles linear, 5–15 × 0.7–1 cm , lowermost branches subtended by 2 membranous bracts or not, the bracts ca. 0.8–4.6 mm long, lanceolate or linear, lower branches paired, suberect, panicles with 5–16 spikelets. Spikelets usually purplish; glumes lanceolate, 8.5–11 mm long, subequal, or lower glumes slightly shorter than upper glumes, veins inconspicuous; lemmas 6.5–8.5 mm long, glabrous in middle part, gradually pubescent toward base and apex; awns 12–19 mm long, 1-geniculate, hairs below the bend 0.4–0.9 mm long gradually decreasing, scabrous above with 0.1 mm long hairs; paleas shorter than lemmas by 0.5–1.5 mm , 2-veined. Caryopses ca. 4.5 mm long, narrow fusiform, with the widest part in the lower 1/3. Anthers 1.4–2.0 mm long, glabrous at apex. Ecological notes:— Stipa bhutanica grows in alpine grassland and thickets and we observed members of this species are in fruit during August–October. Other examined specimens:— CHINA . Sichuan : Haizi-Shan , 3700 m , 29 August 1934 , C . S . Liu 1426 ( PE ) ; Batang , 4500 m , 21 September 1973 , Sichuan Veg. Exped. 4323 ( CDBI ) ; Kangding , 3574 m , 30°01.213 ′ N , 100°30.412 ′ E , 29 September 2014 , Z . S . Zhang & L . L . Li 364 ( PE ) ; Litang , 4123 m , 24 September 2014 , Zhang & Li 321 ( PE ) ; 4200 m , 23 August 1982 , W . Hou 29443 ( CDBI ) ; 4058 m , 30°06.250 ′ N , 100°05.056 ′ E , 24 September 2014 , Zhang & Li 331 ( PE ) ; 3701 m , 30°43.215 ′ N , 100°25.105 ′ E , 26 September 2014 , Zhang & Li 342 ( PE ) ; Muli , 3700 m , 7 September 1963 , Qinghai-Xizang Exped. 14488 ( PE ) ; Puge , 3851 m , 27°37.479 ′ N , 102°20.245 ′ E , 2 October 2014 , Zhang & Li 384 ( PE ) ; 3700 m , 24 September 1965 , The Chinese Academy of Sciences Southwest Border Exped. 1033 ( PE ) ; Yunnan : Shangri-Lah , 3410 m , 27°34. 531 ′ N , 99°50.653 ′ E , 19 September 2014 , Zhang & Li 274 ( PE ) ; Xizang : Yadong , 4300 m , 18 September 1974 , Qinghai-Xizang Exped. 74-2674 ( PE ) ; 4203 m , 16 August 2015 , Zhang 601 ( PE ) . BHUTAN . summit of Chelai-la , 12,800 ft , July 1983 , Keith 173 ( K ) ; Ha / Thimphu district, Chelela , 13,000 ft , 4 April 1986 . D. J . Miller 185 ( K ) .