波密早熟禾 bo mi zao shu he

Annuals (?or perennials), tufted, not rhizomatous; shoots extravaginal. Culms erect, solitary or few per sparse tuft, 20–35(–55) cm tall, 0.8–1.5 mm in diam., compressed, scabrid below nodes, nodes 2 or 3, 0–3 exserted. Leaf sheaths longer to slightly shorter than internodes 8–12 cm, slightly shorter than blade, uppermost closed for 3/7–1/2 of length, finely retrorsely scabrid, glabrous, keel slightly raised; blade flat, thin, 6–11 cm (uppermost often longest), 2–5 mm wide, adaxially smooth or scabrid on keel and veins, adaxially scabrid on and between veins, margins smooth to finely scabrid; ligule 1–2.5 mm, abaxially smooth, apex truncate, obtuse or acute. Panicle open, narrow, slightly lax, 7–14 × 1–3 cm, longest internodes 2–2.5 cm; branches ascending to spreading, 2 per node, slender, flexuous, proximally smooth or scabrid, distally scabrid on and sometimes between angles, longest 3–5 cm with 1–4 spikelets in distal 1/3. Spikelets elliptic, green or slightly purple tinged, 5–6 mm, florets 2 or 3; vivipary absent; rachilla scabrid, glabrous; glumes unequal, apex acuminate, upper keel and surface scabrid, lower glume subulate to narrowly lanceolate, 2.3–3.5 mm, 1- or 3-veined, upper glume lanceolate, 3.3–4.5 mm, 3-veined; lemmas ovate to oblong to lanceolate, 3.2–5 mm, apex acuminate, intermediate veins 5(–7), prominent, surfaces minutely scabrid; callus glabrous; palea finely scabrid, keels scabrid 2/3–3/4 of length. Anthers (1–)1.2–1.7 mm. Fl. and fr. Jun–Sep.

* Mountain meadows among thickets; 4000–4200 m. SE Xizang (Bomi).

Though originally described as a perennial, the two specimens seen appear to be slender-rooted annuals.