稀节披碱草 xi jie pi jian cao

Roegneria laxinodis L. B. Cai, Guihaia 16: 199. 1996.

Culms erect or geniculate at base, 40–80 cm tall, 1–1.5 mm in diam., 3- or 4-noded, pubescent below spike and at nodes. Leaf sheath puberulent or scabrous; ligule ca. 0.5 mm, membranous, apex truncate; leaf blade flat, 10–16 × 0.4–0.6 cm, abaxial surface scabrous or ciliate along veins, adaxial surface villous. Spike erect or slightly curved, lax, 8–11 cm; rachis slender, puberulent; internodes 13–20(–28) mm. Spikelets narrow, 15–18 mm, with 2–5 florets. Glumes lanceolate, 3–5-veined, sparsely spinose along veins and at margin, apex pungent; proximal glume 3–4 mm; distal glume 4–5 mm. Lemma narrowly lanceolate, abaxially puberulent; first lemma 9–10 mm; awn curved, 1.2–1.6 cm. Palea slightly shorter than lemma, scabrous along keels, puberulent between keels, apex truncate or obtuse. Anthers yellow, 2–2.5 mm. Caryopsis lanceolate, 6–7 mm. Fl. and fr. Aug–Sep.

* Mountain slopes; 3500–4000 m. Qinghai (Yushu), Sichuan (Kangding).