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.

(6)25-100 cm, 0.5-3.5 mm thick, spreading to weakly ascending, usually freely branching;

nodes pilose, hairs spreading to ascending;

internodes pilose, with papillose-based hairs, or sparsely hispid.

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.

rounded, glabrous, margins shortly ciliate distally;

ligules 0.6-4 mm, of hairs;

blades (3)6-15 cm long, 1-5 mm wide, spreading, abaxial surfaces sparsely hirsute, adaxial surfaces more densely so, hairs papillose-based, midribs prominent and not white, margins involute, bases cuneate, apices subulate.

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.

2.1-2.9 mm long, 0.8-1 mm wide, 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.

1-1.2 mm, to 1/2 as long as the spikelets, attenuate, 5-9-veined, veins anastomosing apically;

upper glumes and lower lemmas similar, extending about 0.5 mm beyond the upper florets, 11-13-veined;

lower florets sterile;

lower paleas 1-1.3 mm;

upper florets 1.5-1.8 mm long, 0.6-0.8 mm wide, smooth.

panicles 3-35 cm long, about 1/2 as wide, shortly exserted;

axillary panicles smaller, not fully exserted;

rachises scabridulous;

primary branches usually solitary, sometimes paired, divergent and widely spaced, secondary branching mostly on the distal 1/3 of the primary branches;

pedicels 1-4 mm, spreading to appressed, confined to the distal portions of the secondary branches.

= unknown.

= 36.