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.

50-100 cm tall, 2-4 mm thick, erect, rounded near the base, not conspicuously branched, not rooting at the lower nodes;

internodes mostly glabrous, sometimes puberulent 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.

longer than the internodes, smooth or scabridulous, not becoming spirally coiled when old;

ligules 1-3 mm, firm to membranous, truncate, ciliolate;

blades 15-50 cm long, 1-3.5 mm wide, flat to involute, smooth or scabridulous abaxially, scabrous adaxially.

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.

15-35 cm long, 0.5-2(3) cm wide;

primary branches 0.5-8 cm, appressed;

pedicels 1-6 mm, hispidulous.

1.5-3.8 mm, often purple-tinged.

3-4.3 mm, yellowish-brown to purplish.

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.

subequal, (1.7)2-3.1 mm, about 3/4 as long as the florets, scabridulous distally, 1-veined, apices acute to acuminate, awned, awns to 1.5 mm;

lemmas 3-4.3 mm, lanceolate, calluses hairy, hairs to 1.5 mm, lemma bodies scabridulous, apices acuminate, awned, awns 3-10 mm, straight;

paleas 2.9^1.2 mm, lanceolate, scabridulous, acute to acuminate;

anthers 1.5-2.5 mm, yellow to purple-tinged.

1.1-1.6 mm, fusiform, brown.

2-3 mm, fusiform, brownish.

= 40.

= unknown.