Flora of North America species comparison

50-125 cm, mostly glabrous, pubescent below the nodes;

nodes 2-3, dark, 1 glabrous or slightly pubescent.

70-130 cm, mostly glabrous, sometimes pubescent below the nodes;

nodes yellowish, glabrous.

smooth to scabridulous;

ligules of basal leaves 0.5-2.8 mm, truncate to rounded, of upper leaves 1-3.5 mm, rounded to acute;

blades 10-30 cm long, 1-3.5 mm wide, 3-5-veined, abaxial surfaces glabrous, smooth, adaxial surfaces smooth or scabrous over the veins, margins smooth or scabrous.

glabrous;

ligules blunt to acute, of basal leaves 0.4-0.7 mm, of upper leaves to 3 mm;

blades 15-30 cm long, 0.8-1.5 mm wide, usually involute and 0.5 mm in diameter, 3-veined, abaxial surfaces usually glabrous and smooth, sometimes scabrous, adaxial surfaces usually scabrous over the veins, sometimes smooth, sometimes hairy.

6-20 cm, open, with 10-25 spikelets;

branches ascending, flexuous;

pedicels to 1 mm, flattened, hispid.

10-31 cm, open, with 10-50 spikelets;

pedicels 15-20 mm, scabrous.

subequal, 9-12 mm long, 2.5-3.5 mm wide;

lower glumes 5-7-veined;

upper glumes 7-veined;

florets 6.5-10 mm long, 1.5-2.1 mm thick, terete to somewhat laterally compressed;

calluses 0.6-1.9 mm, blunt to acute, strigose;

lemmas golden brown to dark brown at maturity, shiny or not, smooth to spiny-tuberculate distally or for almost their entire length, pubescent, hairs tawny to golden brown, evenly distributed or somewhat more abundant on the basal 1/2, apices tapering to the crown;

crowns 0.5-0.6 mm, inconspicuous, straight, hairy, hairs 0.5-1 mm;

awns 19-27(35) mm, persistent, twice-geniculate, sometimes inconspicuously so;

paleas 6.3-9.5 mm;

lodicules 2, 1-1.5 mm, acute;

anthers 3.5-5.5 mm, sometimes penicillate.

15-22 mm, (3)5-veined;

florets 13.5-22 mm long, 1-2 mm thick, terete;

calluses 3.5-8 mm, sharp, strigose, hairs golden brown at maturity;

lemmas glabrous, tan to brown at maturity, mostly smooth, sharply tuberculate distally, contracted below the crown;

crowns 0.6-0.7 mm wide, hairy, hairs 0.2-0.6 mm;

awns 62-120 mm, persistent, twice-geniculate;

paleas 9-12 mm;

lodicules 2;

anthers 4-7 mm.

about 7 mm, fusiform.

= 42.

= unknown.