红原披碱草 hong yuan pi jian cao

Roegneria hongyuanensis L. B. Cai, Acta Phytotax. Sin. 35: 157. 1997.

Culms erect or geniculate below, 50–70 cm tall, 1.3–2.5 mm in diam., usually 2-noded. Leaf sheath glabrous; ligule very short, apex truncate; leaf blade flat or margin involute, 7–10 × 0.15–0.3 cm, abaxial surface subglabrous, adaxial surface laxly villous. Spike pendulous, lax, 7–10 cm; rachis glabrous but margin scabrous; internodes 5–12 mm. Spikelets 1 per node, green, 10–12 mm excluding awns, with 2 or 3 florets. Glumes lanceolate, ca. 3-veined, glabrous or scabrous along veins, apex acute; proximal glume 3–4 mm; distal glume 4–6 mm. Lemma lanceolate, abaxially sparsely setose; first lemma 8–9 mm; awn straight, 6–11 mm. Palea subequaling lemma, ciliolate along keels, sparsely setose between keels, apex subtruncate to subrounded. Anthers black, ca. 2 mm. Caryopsis oblong, 4–5 mm, apex pubescent. Fl. and fr. summer.

* Meadows; ca. 3400 m. Sichuan (Hongyuan).