大披碱草 da pi jian cao

Basionym: Roegneria grandis Keng, Acta Univ. Nankin. Sci. Nat. 1963(1): 45. 1963.

Plants with short, underground rhizomes. Culms solitary or tufted, 80–100 cm tall, stiff, 5- or 6-noded. Leaf blade 20–30 × ca. 1 cm, subleathery, both surfaces smooth or adaxial surface scabrous. Spike erect, slender, lax, 20–25 cm; rachis scabrous. Spikelets 1 per node, 20–30 mm, with ca. 12 florets. Glumes oblong-lanceolate, 10–15 mm, 5–7-veined, smooth or scabrous, margin ± membranous. Lemma white pilose, apex pointed; first lemma ca. 15 mm including apical point ca. 1 mm. Palea 2/3–3/4 as long as lemma, subsmooth along keels, apex truncate or subrounded. Fl. and fr. Jul–Aug. 2n = 28*.

* Mountain slopes. Henan, Shaanxi.

Löve (Feddes Repert. 95: 458. 1984) did not previously validly publish the combination Elymus grandis; see the note following the genus description above.