Plants bluish. Perennials, densely tufted, sterile shoots intra-and extravaginal. Culms erect, 40–120 cm tall. Leaf sheath smooth or scabrid, uppermost closed for 1/15–1/5 of length; blade flat or folded, papery to thickly papery, up to 25 cm × 1–3(–4) mm, adaxially scabrid; ligule 0.5–3 mm, abaxially scabrid, truncate to acute, of tillers all truncate, collar glabrous. Panicle narrow, dense, 10–15 × 1–3 cm; branches steeply ascending, scabrid angled, with spikelets from the base. Spikelets narrowly lanceolate, weakly compressed, 8–10 mm, florets 4–7; vivipary absent; glumes broad, subequal, lower glume 3–3.5 mm, upper glume 4–4.5 mm, nearly as long as lower lemma; lemmas weakly keeled, 4–6 mm, apex obtuse to acute, glabrous, abaxially scabrid; callus glabrous; palea keels scabrid. Anthers 1.5–3 mm. Fl. and fr. May–Jul. 2n = 62, 63, 64, 65, 68, 70, 71, 97.
Home