Flora of North America species comparison

5-30 cm tall, 0.4-1 mm thick, decumbent, geniculate, or erect;

internodes usually nodulose (occasionally smooth) for most of their length, puberulent or nodulose below the nodes.

10-33 cm, erect or decumbent, sometimes rooting at the lower nodes;

internodes glabrous.

shorter or longer than the internodes, glabrous;

ligules 0.8-3 mm, membranous, acute to truncate, erose;

blades 0.4-6.5 cm long, 0.5-4.2 mm wide, flat or involute, straight or arcuate-spreading, glabrous abaxially, hirtellous adaxially.

usually longer than the internodes, glabrous, margins sparsely hairy distally, hairs to 1 mm, coarse;

ligules 0.3-0.9 mm, membranous, truncate, ciliate;

blades 1-6 cm long, 0.6-2 mm wide, flat to loosely involute, appressed-pubescent to sparsely pilose.

1-15 cm long, 0.1-1.7 cm wide, exserted, narrow or spikelike, rachises usually concealed by the branches;

primary branches 0.4-5 cm, usually closely appressed at maturity, rarely diverging up to 20° from the rachises;

pedicels 0.2-2 mm, setulose.

4-12 cm long, 0.5-2.6(4) cm wide;

primary branches 2-3.5 cm, appressed or diverging up to 70° from the rachises;

pedicels 1-3 mm, glabrous, appressed;

disarticulation above the glumes.

1.7-3.1 mm, occasionally with 2 florets.

2.5-5 mm, borne singly.

subequal, 0.6-2 mm, 1/3– 1/2 as long as the lemmas, green, 1(2)-veined, acute, sometimes mucronate, mucros less than 0.2 mm;

lemmas 1.7-2.6(3.1) mm, lanceolate, dark greenish, plumbeous, or mottled, glabrous, apices scabridulous, acute to acuminate, sometimes mucronate, mucros to 0.5 mm;

paleas 1.2-2.4(2.9) mm, lanceolate, acute;

anthers 0.9-1.6 mm, yellow to purplish.

glabrous, 1-veined, acute to acuminate, unawned or awned, awns to 1.5 mm;

lower glumes 0.8-1.7 mm, entire;

upper glumes 1-2(3) mm;

lemmas (2.5)3-4.5(5) mm, subulate to lanceolate, calluses appressed-pubescent, lemma bodies appearing 5-veined (the intermediate "veins" are actually rows of short barbs on top of folded epidermal ridges), lateral veins occasionally ciliate, apices acuminate, awned, awns 10-32 mm, slender, flexuous;

paleas 2.4-4.4 mm, narrowly lanceolate, glabrous, acuminate;

anthers 0.3-0.6 mm, yellowish.

0.9-1.6 mm, narrowly ellipsoid, brown.

0.6-3.1 mm, narrowly fusiform, light brownish.

= 40.

= 20.