Flora of North America species comparison

30-90 cm tall, 0.5-2 mm thick, erect, much branched above the base;

internodes dull, puberulent or glabrous for most of their length, sometimes strigose immediately below the nodes.

10-38 cm, erect or spreading;

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

smooth or scabridulous, somewhat keeled;

ligules 0.4-1 mm, membranous, truncate, lacerate-ciliolate;

blades 2-20 cm long, 2-6 mm wide, flat, scabrous or smooth, those of the secondary branches similar in length and width to those of the main branches.

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.

terminal and axillary, 2-21 cm long, 0.3-3 cm wide, dense;

primary branches 0.3-5.5 cm, appressed or diverging up to 30° from rachises;

pedicels to 2 mm, strigose;

axillary panicles exserted on long peduncles.

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.

1.5-3.8 mm, often purple-tinged.

1-1.2 mm, appressed to slightly divergent.

subequal, 1.5-3.7 mm, equaling or slightly shorter than the lemmas, 1-veined, tapering from the bases to the acuminate apices, unawned or awned, awns to 2 mm;

lemmas 1.5-3.8 mm, lanceolate, pubescent on the calluses, lower portion of the mid-veins, and margins, hairs shorter than 0.7 mm, apices scabridulous, acuminate, unawned or awned, awns to 10 mm;

paleas 1.5-3.8 mm, narrowly lanceolate, apices acuminate;

anthers 0.3-0.5 mm, yellow to purplish.

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.

1.1-1.6 mm, fusiform, brown.

0.7-0.9 mm, elliptic, reddish-brown.

= 40.

= 20.