Flora of North America species comparison

to 100 cm, often decumbent or stoloniferous, freely branching;

nodes bearded.

30-80(95) cm, stiffly erect;

nodes glabrous or short hirsute.

mostly basal, green, sometimes glaucous;

sheaths glabrous, keeled;

ligules 0.7-1.5 mm;

blades 3-15 cm long, 3-4 mm wide, flat, margins and ligule regions hairy.

tending to be basal;

ligules 0.5-1.5 mm;

blades 5-25 cm long, 2-4.5 mm wide, flat to folded, glabrous or with long, scattered hairs at the base of the blade.

3-5 cm, fan-shaped, often purplish;

rachises 0.2-2 cm, with 3-8 branches;

branches 3-4.5 cm, longer than the rachises, usually with 1 rame;

rame internodes with villous margins, with 1-3 mm hairs.

5-10 cm, fan-shaped, silvery reddish-purple;

rachises 0.5-2 cm, with (1)2-8 branches;

branches 3-9 cm, longer than the rachises, erect to somewhat spreading from the axillary pulvini, usually with only 1 rame;

rame internodes with a central groove narrower than the margins, margins ciliate, with 1-3 mm hairs.

spikelets 3-4 mm, lanceolate;

callus hairs about 1 mm;

lower glumes sparsely hirtellous, with a prominent dorsal pit near the middle;

awns 10-17 mm;

anthers 1-1.8 mm, yellow.

spikelets 3-4.5 mm, narrowly ovate;

lower glumes hirsute below, with about 1 mm hairs, lacking a dorsal pit;

awns 9-17 mm, twisted, geniculate;

anthers 1-2 mm.

spikelets the same size as the sessile spikelets, sterile, pitted or not, occasionally with 2 pits.

spikelets about as long as the sessile spikelets, but usually narrower, sterile or staminate.

= 40, 60.

= 40, 50, 60.