Culms 50-120(150) cm. tall, 1-3-noded, stiffly erect, terete, growing from a slightly thickened base, glabrous, smooth.
Spikelets 10-20 mm. long, 3-6-flowered, green but often tinged with purple, gaping, often drooping.
Pedicels of unequal length, filiform.
Panicle up to 25 cm. long, loose and open, rarely somewhat contracted, erect or slightly drooping; branches usually 2-nate, rather slender, flexuous, branched above the middle, the lower ones fairly remote.
Leaf-lamina 10-60 cm. long, 2-4 mm. wide, usually involute, very rarely expanded, tapering to a setaceous point, erect or obliquely ascending, glabrous, smooth but scaberulous along the edges.
Lemmas 6-10 mm. long, chartaceous, lanceolate, dorsally scaberulous, with the apex subobtuse, acute or very shortly mucronulate from below two minute apical lobes.
Glumes 3-nerved, unequal, lanceolate, acute; the inferior 3·5-6·6 mm. long; the superior 4-8 mm. long.
Leaf-sheaths finely striate, open, fairly tight; the older ones remaining, splitting into regular thin brown fibres, which conspicuously surround the culm-bases.
Ovary glabrous or pubescent at the apex.
Leaf-blades 15–50 cm. long and 2–4 mm. wide, mostly involute; ligule 1–4 mm. long.
Densely tufted perennial; culms 60 cm. to 1 m. high, the base sub-bulbous and thickly clad in the fibrous remnants of old leaf-sheaths.
Spikelets 3–6-flowered, oblong, 10–20 mm. long, gaping, often tinged with pink or purple; glumes unequal, the lower 3.5–6.5 mm. long, the upper 4–8 mm. long; lemmas ± indurated, scaberulous, the lower 6.5–10 mm. long, narrowly obtuse, often with an obscure subapical mucro less than 1 mm. long; palea as long as the lemma, the keels scabrid; ovary glabrous or hairy on the top; anthers 3.5 mm. long.
Tufted, erect, coarse perennial 600-1700 mm high; rhizomes short and stout or long and deeply burrowed; mostly with burnt-off traces of basal sheaths; basal sheaths persistent, splitting into course fibres that form a protective layer around young shoots. Leaf blade 700-1000 x 3.5-6.0 mm; auricles absent or poorly developed; ligule 1-12 mm long. Inflorescence an open panicle, 120-240 mm long; branches usually long, lower half bare, branches and pedicels glabrous, smooth or scabrid due to scattered prickles. Spikelet 10-20 mm long, 3-7-flowered; glumes ±equal, 3-nerved, glabrous; lemma scaberulous, acute or with a minute awn up to 1 mm long, rarely longer; anthers 3.5-5.0 mm long.
Tough, erect perennial, rhizomatous (rhizome short and stout or long and deeply burrowed), up to 1.7 m high. Leaf blades 700-1000 mm long, 3.5-6.0 mm wide. Leaf sheaths persistent, breaking into coarse fibres that form a protective layer around young shoots; ligules 3-12 mm long. Spikelets 10-20 mm long. Panicle open, 120-240 mm long; spikelets 3-7-flowered; lemma acute or minutely awned.
Perennial; up to 1.7 m high; tough; erect; rhizome short and stout; or long and deeply burrowed. Leaf blades 700-1000 x 3.5-6.0 mm; leaf sheaths persistent; breaking into coarse fibres that form a protective layer around young shoots; ligules 3-12 mm long. Flowers: panicle open; 120-240 mm long; lowest branches < 1/2 length of central axis; branches flexuous or rigid; either bare in lower 1/3 or with spikelets from ± the base upwards; spikelets 10-20 mm long; spikelets 3-7-flowered; lemmas acute or minutely awned.
Moist places in high altitude mountain grassland; encouraged by frequent burning.
Moist places in high altitude mountain grassland, encouraged by frequent burning.