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.

30-75 cm tall, 1-2 mm thick, terete to slightly compressed, erect or ascending, stiff, often bent at the nodes, simple or sparingly branched;

nodes densely pubescent.

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.

shorter than or equaling the internodes, rounded, hirsute, green or tinged with purple, margins ciliate;

ligules 0.5-1 mm;

blades 12-30 cm long, 2-12 mm wide, stiffly erect or ascending, flat, pubescent, sometimes sparsely so, hairs papillose-based, bases truncate, 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.

terminal, 15-30 cm long, 10-12(26) cm wide, usually shortly exserted, scarcely overtopping the blades;

rachises hispid, sometimes glabrous basally;

primary branches alternate or opposite, divergent, secondary branches divergent, most abundant on the distal 1/3 of the primary branches, with 1-3 spikelets;

pedicels 2-20 mm, confined to the distal 1/3 of the branches;

pulvini poorly developed, shortly pilose.

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

5-6.5 mm long, 1-1.2 mm wide, glabrous, long-acuminate.

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.

2-3 mm, about 1/2 as long as the spikelets, attached about 0.4 mm below the upper glumes, 5-7-veined, acute to obtuse;

upper glumes and lower lemmas 5-6 mm, exceeding the upper florets by 3-4 mm, 9-13-veined;

lower florets sterile;

lower paleas 1.5-2 mm, acute;

upper florets 1.6-2 mm long, 1-1.1 mm wide, smooth, chestnut brown when mature.

= unknown.

= 36.