Flora of North America species comparison

5-60 cm, erect to decumbent.

50-65 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.

15-30 cm, diffuse at maturity, lower branches ascending to horizontal, spikelets usually confined to the distal 2/3;

pedicels uniformly scabrous, lacking tumid epidermal cells.

2.5-7 mm, with 2-7 florets.

7-10 mm, with 4-7 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 1.8-2.5 mm, up to approximately 1/2 as long as the adjacent lemmas;

upper glumes 2.5-3 mm;

rachilla internodes slightly and gradually broadened to the point of attachment with the lemmas, at least the lowest internodes usually more than 0.09 mm thick;

calluses with a few hairs;

lemmas 3-4.4 mm, mostly herbaceous, hairy on the proximal 1/2, principally along the veins, backs rounded or keeled distally, 5-veined, veins obscure, not extending to the margins, apical margins hyaline, uniformly scabrous, apices obtuse to acute, entire;

palea veins with curly, intertwined hairs proximally, scabrous distally;

anthers 1.1-1.5 mm.

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

blades 1-7 mm wide, flat to involute.

2.5-3.3 mm, obtuse to truncate, entire;

blades 1.8-3.2 mm wide, flat.

= 14, 28, 42.

= 56.