Flora of North America species comparison

5-60 cm, erect to decumbent.

20-100 cm, erect to decumbent.

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.

3-30 cm, compact to diffuse at maturity, lower branches erect to descending, spikelet-bearing from about midlength;

pedicels usually densely scabrous, occasionally with only a few scattered scabrules, often with tumid epidermal cells.

2.5-7 mm, with 2-7 florets.

5.5-13 mm, with 4-9 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 obscure, apices acute to obtuse;

lower glumes 2-3.4 mm;

upper glumes 3-4.5 mm;

calluses with few to many hairs;

lemmas 3-5 mm, slightly to markedly coriaceous throughout, sparsely to densely hairy in the lower 1/2, principally along the veins, backs rounded, 5-veined, veins obscure, usually not extending to the margins, sometimes the midvein doing so, apical margins usually smooth, sometimes with a few scattered scabrules, occasionally densely scabrous, apices acute to obtuse, entire;

palea veins ciliate proximally, scabrous to short-ciliate distally;

anthers 1.5-2.6 mm.

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

blades 1-7 mm wide, flat to involute.

1-3.5 mm, obtuse to truncate, entire;

blades 2-4.4 mm wide, flat to involute.

= 14, 28, 42.

= 14-77, usually 56.