Coarse green to yellowish green perennial tufts, 30-120 cm, with heavy panicles. Leaf-sheath keeled above, lower sheaths with fine, silky hairs, the hairs more scattered in upper sheaths. Ligule 3-5 mm, ± tapered, denticulate. Leaf-blade 15-40 cm × 8-15 mm, abaxially smooth, or minutely scabrid on ribs, adaxially with scattered fine hairs; margins finely scabrid, tip acute to acuminate. Culm stout, ascending to erect, internodes glabrous. Panicle 15-35 cm, erect or nodding above, pyramidal with scabrid branches in threes or pairs from the distant nodes; lower branches ascending, horizontal or sometimes drooping, upper branches ascending to erect. Spikelets 2.5-4 cm, 5-9-flowered, elliptic-oblong to ± cuneate, light green, sometimes purple-suffused. Glumes ± unequal, subacute to acute, keel minutely scabrid; lower 10-14 mm, 5-7-nerved, upper c. 15 mm, 9-nerved. Lemma 17-23 mm, 9-13-nerved, keeled, nerves scabrid, internerves smooth to slightly scabrid; awn 0.5-4-(5) mm. Palea c. ⅔ length of lemma or shorter. Callus with minute hairs. Rachilla scabrid or sparsely minutely pubescent. Anthers 0.5-1 mm in cleistogamous flowers, c. 4.5 mm in chasmogamous flowers. Caryopsis 7.1-7.2 × 1.5-2.2 mm. Fig. 12.