UW Burke Herbarium species comparison

Sheaths closed;

ligules 0.5-1 mm. long, hairy;

blades flat, 1.5-4 mm. broad.

Sheaths closed;

ligules 1.5-3 mm. long, lacerate;

blades flat, 1.5-3 mm. broad, finely pubescent.

Inflorescence an erect, narrow, crowded panicle 3-10 cm. long, the spikelets exceeding the pedicles;

spikelets 5- to 7-flowered, 1-2 cm. long; first glume 4-6 mm. long, lanceolate, the second slightly longer and wider;

lemmas 6.5-8.5 mm. long, the area between the nerves depressed and concave;

lemmas with straight awns 6-10 mm. long from a bifid apex.

Inflorescence a dense, ovoid, purplish panicle 3-8 cm. long, the lower branches strongly ascending, much shorter than the glumes;

spikelets subsessile, stiffly erect, 5- to 9-flowered, 17-22 mm. long including the awns;

glumes narrowly lanceolate, the first 8 mm. long, 1-nerved, the second 3-nerved, 2-3 mm. longer;

lemmas 13-15 mm. long, the two teeth 4-5 mm. long, the awn attached between the teeth 2 cm. long, curved;

stamens 2, included.