Flora of North America species comparison

30-100 cm, geniculate.

5-150 cm, erect.

compressed, glabrous or sparsely pilose;

ligules 0.5-1.4 mm;

blades 3-28 cm long, (1)3-7.2 mm wide, glabrous or sparsely long-pilose adaxially.

keeled, glabrous, scabrous, or slightly pubescent;

ligules 1.3-2 mm;

blades 2-35 cm long, 2-7 mm wide, flat, glabrous or scabrous (sparsely pilose).

3-5(8.5) cm;

fascicles 5.5-10.2 mm long, 2.5-5 mm wide, imbricate, ovoid to globose, glabrous or sparesely to moderately pubescent;

outer bristles, when present, mostly flattened;

inner bristles 8-40 (rarely more), 2-5.8 mm long, 1-2 mm wide, fused at least 1/2 their length, forming a distinct cupule, the distal portions usually diverging from the cupule at multiple, irregular intervals, sometimes diverging at more or less the same level, ciliate at the base, pubescent, stramineous to mauve or purple, flattened.

2-15 cm;

fascicles 4-11 mm long, 2-4.5 mm wide;

bristles 30-60;

outer bristles numerous, less than 1/2 as long as the inner bristles, terete;

inner bristles 2.9-7 mm long, 0.2-1.1 mm wide, flattened, with 1-3 grooves abaxially, fused only at the base, forming a shallow disk, retrorsely scabrous, inner margins long-ciliate.

2-4 per fascicle, 3.5-5.9 mm, glabrous.

1-3(4) per fascicle, 3.5-6 mm long, 1.2-1.9 mm wide;

lower glumes 0.5-2.5 mm;

upper glumes 2.5-4.9 mm, 3-5-veined;

lower lemmas 3.2-5.5 mm, 4-5-veined;

upper lemmas 3.4-5.9 mm;

anthers about 1.5 mm.

about 2.5 mm long, 1-2 mm wide, ovoid.

2-3.4 mm long, 1-3.5 mm wide, ovoid.

glumes 1-3.3 mm;

upper glumes (2.8)3.5-5 mm, 5-7-veined;

lower florets sometimes staminate;

lower lemmas 3-5(5.9) mm, 5-7-veined;

lower paleas sometimes reduced or absent;

anthers 1.3-1.6 mm;

upper lemmas 3.5-5(5.8) mm;

anthers 0.5-1.2 mm.

= 34 (32).

= 34.