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.

30-80 cm, slightly decumbent basally, erect above, not conspicuously branched, branches, when present, not geniculate and widely divergent;

internodes mostly glabrous, sometimes hirtellous below the nodes.

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.

shorter than the internodes, glabrous, margins whitish, rounded towards the base, not becoming spirally coiled when old;

ligules 4-7(10) mm, acuminate, lacerate;

blades 5-20(25) cm long, 0.2-1.2 mm wide, tightly involute, arcuate, scabrous abaxially, scabrous or hirtellous adaxially.

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.

8-20(25) cm long, 2-5 cm wide, loosely contracted;

primary branches 0.5-7 cm, capillary, diverging up to 70° from the rachises, naked basally;

pedicels 3-20 mm.

1.7-3.1 mm, occasionally with 2 florets.

3.5-5 mm, stramineous to brown or purplish.

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.

subequal, 1.5-2.5 mm, shorter than the florets, thin, hyaline, glabrous;

lower glumes veinless, truncate or obtuse, often toothed or notched;

upper glumes 1-veined or veinless, obtuse to acute, often mucronate, mucros shorter than 0.7 mm;

lemmas 3.5-5 mm, narrowly lanceolate, calluses hairy, hairs to 0.6 mm, lemma bodies glabrous, smooth, shiny, apices acuminate, awned, awns 10-30 mm, clearly demarcated from the lemma bodies, flexuous;

paleas 3.5-5 mm, narrowly lanceolate, glabrous, acuminate;

anthers 2-2.6 mm, greenish.

0.9-1.6 mm, narrowly ellipsoid, brown.

2.4-3.2 mm, fusiform, brownish.

= 40.

= 40.