Flora of North America species comparison

(30) 55-80(100) cm, unbranched, scabrous beneath the panicles;

nodes (1)2(5).

and collars usually scabrous, rarely smooth;

ligules (0.5)2-5.5(7) mm, usually truncate, entire to slightly lacerate;

blades (8)10-20(27) cm long, (1.5)2-3(4) mm wide, usually involute, abaxial surfaces usually scabrous, rarely smooth, adaxial surfaces scabrous, glabrous or sparsely hairy, both surfaces with abundant white glands between the veins, visible only with magnification.

(6)8-11(15) cm long, (1)1.2-1.5 cm wide, contracted, mostly erect, pale green to green;

branches 2-4(4.5) cm, scabridulous, usually spikelet-bearing to the base.

(4.5)5-7(8) mm;

rachilla prolongations about 1.5 mm, hairs 1-2 mm.

keeled, usually scabrous over the entire surface, rarely only the keels scabrous distally, lateral veins prominent, apices acute to acuminate;

callus hairs 1-1.5(2) mm, 0.2-0.4 times as long as the lemmas, sparse;

lemmas 4.5-6.5 mm, 0-2 mm shorter than the glumes;

awns 5-6(8) mm, attached to the lower 1/10 – 1/5 of the lemmas, exserted less than 2 mm, stout, distinguishable from the callus hairs, bent;

anthers (2.5)3-3.5(4) mm.

= 28.