Flora of North America species comparison

5-60 cm, erect to decumbent.

10-65 cm, usually decumbent and geniculate, sometimes erect.

2.5-20 cm, diffuse at maturity, lower branches horizontal to descending, spikelets usually confined to the distal 2/3, pedicels scabrous, lacking tumid epidermal cells.

4-16 cm, compact to diffuse at maturity, linear to pyramidal, lower branches ascending to erect, spikelet-bearing nearly to the base;

pedicels slightly to densely scabrous, often with tumid epidermal cells.

2.5-7 mm, with 2-7 florets.

3-6 mm, with 2-6 florets.

rounded over the back, veins obscure, apices acute to truncate;

lower glumes 0.4-1.3 mm;

upper glumes 0.9-1.8 mm;

calluses with a few hairs;

lemmas 1.5-2(2.2) mm, mostly herbaceous, glabrous or sparsely hairy on the lower 1/2, principally along the veins, backs rounded, 5-veined, veins obscure, not extending to the margins, apical margins hyaline and often yellowish, uniformly and densely scabrous, apices widely obtuse to truncate, entire;

palea veins shortly ciliate proximally, glabrous, sometimes scabrous distally;

anthers 0.4-0.8 mm.

rounded over the back, veins prominent to obscure, apices acute to obtuse;

lower glumes 0.8-1.6 mm;

upper glumes 1.2-2.3 mm;

calluses with a few hairs;

lemmas 1.8-3 mm, slightly to markedly coriaceous throughout, glabrous or with a few hairs near the base, backs rounded, 5-veined, veins obscure, midveins usually excurrent, sometimes ending at the margins, apices acute to obtuse, entire, apical margins smooth or with a few scattered scabrules;

palea veins glabrous proximally, scabrous to shortly hispid near midlength, scabrous distally;

anthers 0.6-1 mm.

0.8-1.2 mm, obtuse to truncate, usually entire;

blades 1-7 mm wide, flat to involute.

1-2 mm, obtuse to truncate, entire;

blades 2-7 mm wide, flat, folded, or involute.

= 14, 28, 42.

= 28.