Flora of North America species comparison

30-120 cm tall, 0.8-2.5 mm thick, erect, seldom branched above the base;

internodes dull, mostly puberulent (sometimes sparsely so), terete, rarely keeled, strigose immediately below the nodes.

5-40 cm, slender, erect;

internodes mostly glabrous, scabridulous or smooth, scabridulous or strigulose below the nodes.

scabridulous, slightly keeled;

ligules 0.2-0.6 mm, membranous, truncate, lacerate-ciliolate;

blades 2-15 cm long, 2-6 mm wide, flat, usually scabrous or scabridulous, occasionally smooth.

shorter or longer than the internodes, smooth or scabridulous;

ligules 1-2.6 mm, hyaline, truncate to obtuse, sometimes with lateral lobes;

blades 0.5-4(10) cm long, 0.8-2 mm wide, flat or involute, scabrous abaxially, shortly pubescent adaxially.

1.5-12 cm long, 0.3-1.8 cm wide, lobed, dense;

primary branches 0.2-2.5 cm, appressed;

pedicels absent or to 1 mm, strigose.

5-16.2(21) cm long, 1.5-6.5 cm wide, open;

primary branches 8-42 mm, often capillary, diverging 25-80° from the rachises;

pedicels 2-7 mm, straight or curved, but rarely curved as much as 90°.

3-8 mm.

0.8-1.5 mm.

subequal, 3-8 mm (including the awn), about 1.3-2 times longer than the lemmas, smooth or scabridulous distally, 1-veined, acuminate, awned, awns to 5 mm;

lemmas 1.9-3.1 mm, lanceolate, pubescent on the calluses, mid-veins, and margins, hairs to 1.2 mm, apices scabridulous, acuminate, unawned or awned, awns to 1 mm;

paleas 1.9-3.1 mm, lanceolate, loosely pilose between the veins, apices acuminate;

anthers 0.8-1.5 mm, yellowish.

sparsely strigulose, at least near the apices, 1-veined;

lower glumes 0.5-0.8 mm, obtuse to acute;

upper glumes 0.6-0.9 mm, broader than the lower glumes, obtuse;

lemmas 0.8-1.5 mm, lanceolate, brownish to purplish, glabrous or the midveins and margins appressed-pubescent, apices obtuse to subacute, unawned;

paleas 0.8-1.4 mm, shortly pubescent or glabrous;

anthers 0.2-0.7 mm, purplish.

1-1.6 mm, fusiform, brown.

0.6-0.9 mm, fusiform to elliptic, brownish.

= 20.

= 60, 80.