Flora of North America species comparison

40-120 cm tall, less than 2 mm thick, erect;

internodes mostly pubescent, retrorsely hirsute to strigose below the nodes.

10-38 cm, erect or spreading;

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

mostly glabrous, usually pubescent near the base, scabridulous distally;

ligules 0.4-1.2 mm, membranous, truncate, ciliolate;

blades 6-20 cm long, 4-10(15) mm wide, flat, glabrous and smooth abaxially, occasionally scabridulous adaxially.

often longer than the internodes, scabridulous, margins hyaline;

ligules 1-3 mm, hyaline, obtuse, irregularly toothed to lacerate, with lateral lobes;

blades 1-10 cm long, 0.4-2 mm wide, flat, scabrous abaxially, strigulose adaxially, margins and midveins thickened basally, whitish.

usually terminal, 10-33 cm long, 0.2-0.8 cm wide, exserted;

branches 1-10 cm, ascending to appressed;

pedicels 1-6 mm, strigose.

10-24 cm long, 3.5-11 cm wide, diffuse;

primary branches 2.2-6.2 cm long, about 0.1 mm thick, diverging 80-100° from the rachises, straight;

pedicels 6-10 mm long, about 0.02 mm thick, delicate;

disarticulation above the glumes.

2.6-4.5 mm, overlapping the next spikelet on the branch by 1/4 of its length.

1-1.2 mm, appressed to slightly divergent.

subequal, 1.3-3 mm, shorter than the lemmas, 1-veined (lower glumes rarely 2- or 3-veined), tapering from near the base, bases overlapping, apices scabridulous, acute, unawned or awned, awns to 1 mm;

lemmas 2.6-4.5 mm, lanceolate to narrowly lanceolate, usually pubescent on the calluses, lower 1/3 of the midveins, and margins (hairs sometimes restricted to the callus), hairs shorter than 1.2 mm, apices acute or acuminate, usually awned, awns to 12 mm;

paleas 2.6-4.5 mm, lanceolate to narrowly lanceolate, shortly pilose on the lower portion, apices acuminate;

anthers 1.1-2.2 mm, yellowish.

equal to subequal, 0.5-1 mm, glabrous throughout or obscurely puberulent, hairs about 0.06 mm, 1-veined, obtuse or subacute;

lemmas 1-1.2 mm, oblong-elliptic, purplish to light brownish, not mottled, glabrous or densely appressed-puberulent on the margins and midveins, apices obtuse, unawned;

paleas 0.9-1.2 mm, oblong-elliptic;

anthers 0.3-0.5 mm, purplish.

2-2.3 mm, fusiform, brown.

0.7-0.9 mm, elliptic, reddish-brown.

= 40.

= 20.