阿拉善披碱草 a la shan pi jian cao

Roegneria alashanica Keng, Acta Univ. Nankin. Sci. Nat. 1963(1): 73. 1963.

Plants ± with rhizome. Culms laxly tufted, 40–60 cm tall, rigid, 3-noded. Leaf sheath usually fibrous and broken at base; leaf blade setaceous, involute, 5–8(–12) × 0.2–0.3 cm, stiff, both surfaces pubescent or abaxial surface smooth and glabrous. Spike erect, slender, 5–10 cm. Spikelets 1 per node, yellowish, 12–15 × 2–3 mm, with 3–6 florets, glabrous; rachilla glabrous. Glumes oblong-lanceolate, 3-veined, margin membranous, apex acute, rarely obtuse; proximal glume 5–6 mm; distal glume 7–9 mm. Lemma lanceolate, smooth, obscurely 5-veined, margin narrowly membranous, apex acute to pointed; callus smooth, glabrous; first lemma ca. 10 mm. Palea subequaling or slightly longer than lemma, apex truncate. Anthers ca. 3 mm. Fl. and fr. late summer.

* Mountain slopes; ca. 1800 m. Gansu, Nei Mongol, Ningxia, Xinjiang.