单花新麦草Psathyrostachys kronenburgii (Hack.) Nevski

别名：新疆新麦草;克罗氏新麦草;单穗新麦草;哈伯日根纳-额布苏;

科名：禾本科 Gramineae

属名：新麦草属 Psathyrostachys

《中国植物志》第9(3)卷026页
  4．单花新麦草（拟）图版6: 4-6
  Psathyrostachys kronenburgii(Hack.) Nevski in Kom. Fl. URSS 2: 713. 1934; 禾本科图说435.图369. 1959. ——Hordeum kronenburgii Hack. in Allg. Bot. Zeitschr 11: 133. 1905.
  多年生，具直伸的短根茎，密集丛生。秆高30-60厘米，基部残留枯黄纤维状叶鞘。叶鞘无毛，短于节间；叶舌长1-2毫米，先端撕裂；叶片灰绿色或绿色，分蘖者长约10厘米，秆生者长3-5厘米，宽3-5毫米，扁平或内卷，两面都粗糙。穗状花序下部被短柔毛，长5-7厘米，宽8-10厘米，穗轴很脆，易断，侧棱具柔毛，毛长2.5-3.5毫米，节间长2-4毫米；小穗3枚生于1节，含1小花和1枚棒状不孕小花，有时基部含2小花，长7-9毫米；颖锥形，密被柔毛，长6-8毫米；外稃披针形，具5脉，被柔毛，第一外稃长6-10毫米，先端延伸成短芒，芒长1-3毫米；内稃与外稃等长，具2脊，脊上被纤毛。花、果期6-8月。
  产新疆、甘肃等省区。生于山地草原及半荒漠地带的河谷阶地。苏联中亚也有分布。模式标本采自费尔干纳的东南部塔尔迪克山。

《Flora of China》 Vol. 22 (2006)
Psathyrostachys kronenburgii  (Hackel) Nevski
单花新麦草   dan hua xin mai cao
Hordeum kronenburgii Hackel, Allg. Bot. Z. Syst. 11: 133. 1905; Elymus kronenburgii (Hackel) Nikiforova.
Culms usually densely tufted, (50–)70–90 cm tall, 3–5-noded, glabrous, but pubescent just below spike. Leaf sheath grayish brown at base when older, ± separating into individual fibers; ligule 0.4–2 mm; leaf blade green or glaucous green, flat, 3–13 × 0.2–5 cm. Spike greenish, 5–7 × 0.9–1.2 cm; rachis pubescent, margin hirsute. Spikelets usually 3 per node, narrowly ovate, 0.8–1 cm, with 1(or 2) florets. Glumes violet tinged, (6.5–)8–10 mm, pilose. Lemma 6–12 mm, prominently 5-veined, pilose, tapering into a short awn (1.8–)2–3.5 mm. Palea equaling lemma, ciliate along keels. Lodicules 0.6–1.3 mm. Anthers violet, 5–6 mm. Caryopsis 4–4.5 mm. Fl. and fr. Jun–Aug. 2n = 14.
Grassy places on mountain slopes or river banks. Gansu, Qinghai, Xinjiang [Russia; C Asia].