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Glumes unequal, chartaceous, 1-nerved, glabrous, smooth, slightly scaberulous on the keels; the inferior up to 13 mm. long, lanceolate, acuminate, shortly awned; the superior up to 22 mm. long, narrower, gradually tapering into an awn up to 5 mm. long or with a very short awn from the sinus between 2 hyaline lacerate lobes.
Lemma 8-9 mm. long, linear or tubular, pallid or dark-mottled, finely punctulate; callus 2-3 mm. long, acuminate, densely barbate; column 20-40 mm. long, strongly twisted, scabrous; awns 25-60 mm. long, subequal, very fine, scabrous; articulation between the apex of the lemma and the base of the column.
Panicle 20-25 cm. long, shortly exserted, usually erect and stiff, narrow, dense, spiciform, many-flowered; axis terete, usually glabrous, smooth; branches more or less terete, appressed, glabrous, smooth, or slightly scaberulous.
Leaf-laminae up to 30 x 0.4 cm., but often much shorter, flat or involute, usually glaucous, minutely scabrous above, glabrous beneath.
Culms erect, robust, usually simple or sparingly branched from the upper nodes, glabrous, smooth, 4-6-noded; nodes glabrous, smooth.
Leaf-sheaths usually lax, usually glabrous, smooth, sometimes the lower ones with long scattered hairs.
Ligule an obsolete, minutely ciliolate rim; auricles usually short-ciliolate; collar glabrous.
Perennial, 70-150 cm. high, laxly or densely caespitose.
Spikelets pallid or greenish.
A grass.
