UW Burke Herbarium species comparison

Leaf blades flat, 3-10 mm. wide;

sheaths with soft, spreading hairs;

ligules lacerate, 3-5 mm. long;

auricles lacking.

Sheaths closed, usually pubescent;

auricles tiny, if any;

ligules 1-3 mm. long;

blades nearly flat, glabrous or pubescent, 3-12 mm. broad.

Inflorescence a spreading to erect panicle 10-15 cm. long, the branches elongate, bearing only 1-2 spikelets;

spikelets 5- to 7-flowered, 2.5-4 cm. long, broadest above mid-length;

glumes glabrous, narrowly lanceolate, the first 1-nerved, 15-20 mm. long, the second 3-nerved, 25-33 mm. long;

lemmas 25-30 mm. long, puberulent, the 2 teeth slender, 3-4 mm. long, the awn attached between the teeth 3.5-6 cm. long, straight;

stamens 3.

Inflorescence a narrow panicle 10-25 cm. long, the branches usually ascending;

spikelets 2-3 cm. long, strongly compressed, 5- to 10-flowered;

glumes lanceolate-acuminate, keeled, the first 5-9 mm. long, the second nearly twice as long;

lemmas keeled, shallowly bifid at the tip, with a straight awn 3-15 mm. long.

Utricle