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.

5-42 cm tall, 0.5-1 mm thick, decumbent near the base, forming dense mats;

internodes glabrous, slightly nodulose.

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.

shorter or longer than the internodes, glabrous;

ligules 0.1-1(1.8) mm, membranous, truncate, occasionally lacerate;

blades 0.4-6 cm long, 0.5-1.4 mm wide, involute, glabrous, smooth or scabridulous 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.

1-9 cm long, 0.1-0.6 cm wide, contracted, not dense, usually partially included in the upper leaf sheaths;

primary branches 0.2-3 cm, usually closely appressed at maturity, rarely diverging up to 40° from the rachises;

pedicels 0.2-3.6 mm, setulose.

1.5-3.8 mm, often purple-tinged.

2.6-4.2 mm, occasionally with 2 florets.

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, 1.1-3.6 mm, from 1/2 as long as to equaling the lemmas, light green, 1(2-3)-veined, acute, unawned;

lemmas 2.6-3.2(4.2) mm, lanceolate, dark greenish or mottled, glabrous or the calluses and margins appressed-pubescent, hairs to 0.3 mm, apices scabridulous, attenuate, usually mucronate, mucros 0.1-0.3 mm;

paleas 2.1-3.3 mm, lanceolate, smooth or scabridulous, acute;

anthers 0.7-1.4 mm, yellow to purplish.

1.1-1.6 mm, fusiform, brown.

1.1-1.5 mm, ellipsoid to ovoid, brownish.

= 40.

= 60, 70-72.