低株披碱草 di zhu pi jian cao

Agropyron jacquemontii J. D. Hooker, Fl. Brit. India 7: 369. 1896 ["1897"]; Anthosachne jacquemontii (J. D. Hooker) Nevski; Roegneria jacquemontii (J. D. Hooker) Nevski.

Culms slender, 15–20 cm tall, 2- or 3(or 4)-noded. Leaf blade green or light green, glaucous, involute, 2–4(–7) × 0.1–0.2 cm, abaxial surface glabrous, adaxial surface scabrous or ± pubescent. Spike 4–11 × 0.8–2 cm, with 4 or 5 spikelets; rachis slender, 8–15 mm, glabrous. Spikelets 1 per node, subsessile, 12–18 mm, with 4–7 florets. Glumes 4.5–7 mm, 5-veined, glabrous, margin hyaline, apex with short awn 1–3(–5) mm. Lemma lanceolate, glabrous throughout; first lemma 7–9 mm; awn strongly curved, 20–50(–60) mm. Palea equaling lemma, ciliate along keels, apex obtuse. Anthers yellow or purple, 1.2–2.5 mm. Fl. and fr. late summer. 2n = 28*.

* Stony mountain slopes, alluvial soils, between rocks, usually growing together with Elymus burchan-buddae and E. nutans; ca. 3900 m. Xinjiang, Xizang.