Flora of North America species comparison

20-80 cm, wiry.

shorter than the internodes, keeled, usually glabrous, rarely sparsely pilose;

ligules 0.2-0.6 mm;

blades 5-25 cm long, 1-3.5 mm wide, stiff, adaxial surfaces usually glabrous, smooth or scabrous.

2-6(6.8) cm;

rachis internodes 2-4 mm;

fascicles 5-13 mm long, 2-4 mm wide, not imbricate, ovoid, glabrous;

outer bristles sometimes present, flattened;

inner bristles less than 30, 3.2-6 mm long, 0.2-1 mm wide at the base, in more than 1 whorl, fused for at least 1/2 their length into a distinct cupule, diverging at irregular intervals from the cupule, somewhat flattened, spreading, purple-tipped at maturity.

1-3 per fascicle, 4-7 mm.

1.4-3.1 mm;

upper glumes 3.2-5.4 mm, 3-5-veined;

upper lemmas 4-6 mm, 3-5-veined;

upper florets 3.9-6.5 mm;

anthers 0.9-1.9 mm.

1.8-3 mm long, 1-1.5 mm wide, ovoid-elliptic.

= 34.