Flora of North America species comparison

slender, wiry, glabrous, often with minute purple streaks and dots, ascending from a decumbent base, often branching extensively at the base and rooting at the lower nodes.

40-120 cm tall, 2-3 mm thick, decumbent to erect, branching from the base and the middle nodes;

nodes pilose, hairs spreading;

internodes hirsute, hairs papillose-based.

usually shorter than the internodes, glabrous, margins short-ciliate;

ligules usually less than 0.3 mm, membranous, erose, ciliate;

blades 4-15 cm long (rarely longer), 2-3 mm wide, flat or slightly involute, glabrous on both surfaces, margins scabridulous, especially towards the apices, bases narrowed.

usually shorter than the internodes, hirsute, lower sheaths more so than those above, hairs papillose-based;

collars densely pilose;

ligules 0.5-4 mm;

blades 16-55 cm long, 0.5-14 mm wide, erect to ascending, abaxial surfaces hirsute, hairs papillose-based, adaxial surfaces densely pilose, midveins prominent and whitish, bases truncate, margins ciliate basally, apices attenuate.

4-17 cm, 1/2 to nearly as wide as long;

branches few, capillary, ascending or spreading, scabridulous, with a few spikelets distally;

pedicels 0.5-10 mm.

3.2-4 mm long, about 1.5 mm wide, broadly ellipsoid or obovoid, tuberculate, hispid, faintly veined, acute or acuminate at the apices.

2.6-3.4 mm long, 0.9-1.2 mm wide, ovoid, glabrous.

usually less than 1 mm, obtuse or acute;

upper glumes and lower lemmas subequal, distinctly tuberculate, hispid, with stiff hairs arising from wartlike bases;

upper florets 2.7-3.2 mm long, 1.3-1.6 mm wide, obovoid or ellipsoid, nearly smooth, minutely papillose, or cross-rugulose, subacute to acute.

1.4-1.7 mm, to 1/2 as long as the spikelets, acute, 5-7-veined;

upper glumes and lower lemmas similar, exceeding the upper florets by 0.7-0.9 mm, 9-13-veined;

lower florets sterile;

lower paleas 0.5-1.3 mm;

upper lorets 1.7-2.3 mm long, 0.8-1.1 mm wide, smooth, ovoid.

panicles 7-35 cm long, 5-23 cm wide, about 1/2 as wide as long, shortly exerted or partially included, lax, open;

axillary panicles smaller, included basally;

primary branches diverging, lower branches solitary, upper branches solitary to subverticillate;

secondary branching primarily in the distal 1/3;

pedicels 1-4 mm, clavate, spreading to appressed.

= unknown.

= unknown.