Flora of North America species comparison

12-110 cm;

lower nodes glabrous or pubescent.

10-32 cm, contracted.

16-35 mm, 3-5-veined;

lower glumes 18-35 mm;

upper glumes 1-3 mm shorter;

florets 7-13 mm;

calluses 2-4 mm;

lemmas evenly pubescent, hairs about 1 mm, white, sometimes glabrous immediately above the callus;

awns 65-225 mm, first 2 segments scabrous to strigose, hairs shorter than 1 mm, terminal segment scabridulous.

sheaths glabrous or pubescent, not ciliate;

ligules of lower leaves 1-6.5 mm, scarious, usually acute, sometimes truncate, often lacerate;

ligules of upper leaves to 7 mm;

blades 0.5-4 mm wide, usually involute.