Flora of North America species comparison

10-80 cm, often geniculate at the base, much branched near the base;

internodes mostly scabridulous or smooth, always scabridulous below the nodes.

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

internodes glabrous, slightly nodulose.

often shorter than the internodes, glabrous, smooth or scabridulous;

ligules 1-2 mm, membranous to hyaline, truncate to obtuse;

blades 3-8.5(10) cm long, 1-2.5 mm wide, flat or loosely involute, scabrous abaxially, strigulose adaxially.

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.

6.5-13.5 cm long, 1-6.5 cm wide, not dense, often purplish;

branches 1.6-4 cm, ascending or diverging up to 80° from the rachises, spikelet-bearing to the base;

pedicels 2-6 mm, appressed to divaricate, antrorsely scabrous;

disarticulation above the glumes.

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.

2.5-5.5 mm, borne singly.

2.6-4.2 mm, occasionally with 2 florets.

0.4-1.3 mm, exceeded by the florets, 1-veined, obtuse, often minutely erose;

lower glumes 0.4-1 mm;

upper glumes 0.6-1.3 mm;

lemmas 2.5-3.8(5.3) mm, narrowly lanceolate, mostly smooth, scabridulous distally, hairy on the calluses, lower 1/2 of the margins, and midveins, hairs 0.2-0.5 mm, apices acuminate, awned, awns 10-30 mm, straight to flexuous;

paleas 2.2-4.8 mm, narrowly lanceolate, acuminate;

anthers 0.3-1.2 mm, 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.

1.7-2.5 mm, fusiform, reddish-brown.

1.1-1.5 mm, ellipsoid to ovoid, brownish.

panicles with 1-3 spikelets present in the axils of the lower leaves.

= 20, 40, 60.

= 60, 70-72.