Flora of North America species comparison

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

nodes bearded.

35-65 cm, slender, stiffly erect, rarely geniculate;

lower nodes shortly hairy, hairs shorter than 3 mm, usually off-white and ascending;

upper nodes glabrous or glabrate.

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.

mostly basal, glaucous;

ligules 1-1.5 mm;

blades 10-25 cm long, 1-2(3.5) mm wide, flat to rolled, with 3-7 mm hairs below the middle.

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.

6-12 cm, loose, fan-shaped;

rachises shorter than 5 cm, with 3-6 branches;

branches longer than the rachises, not rebranched, with 1 rame;

rame internodes with 3-5 mm marginal 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 5-8 mm, lanceolate;

lower glumes 5.5-7 mm, glabrous, shiny, with a deep dorsal pit, tapering to a narrow, slightly bifid apex;

awns 20-28 mm;

anthers 0.5-1 mm.

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

spikelets 2.5-3.5 mm, sterile.

= 40, 60.

= 60.