Flora of North America species comparison

30-60 cm, slender.

70-180 cm, erect;

nodes 3-7, pubescent or puberulent;

internodes pubescent, puberulent, or glabrous.

pilose-pubescent to nearly glabrous;

blades 7-28 cm long, 2-9 mm wide, pilose or glabrous.

densely pubescent, hairs to 1 mm, collars with hairs to 2 mm, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles sometimes present;

ligules 1-3 mm, densely pubescent to pilose, obtuse, lacerate;

blades (13)18-38 cm long, 3-12 mm wide, flat, sparsely to densely pubescent on both surfaces.

10-20 cm long, 3-9 cm wide, erect, dense;

branches appressed to spreading, sometimes flexuous.

14-27 cm long, very open, nodding;

branches flexuous, usually widely spreading, with spikelets near the tips.

15-20 mm, elliptic to lanceolate, more or less terete, with 3-9 florets.

20-37(45) mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-9(10) florets.

glabrous, acuminate;

lower glumes 8-10 mm, 1-veined;

upper glumes 12-16 mm, 3(5)-veined;

lemmas 11-14 mm, lanceolate to linear-lanceolate, sparsely pubescent, 5-veined, rounded over the midvein, apices acuminate, bifid, teeth 2-3 mm, usually aristate, sometimes acuminate;

awns 13-20 mm, geniculate, strongly to moderately twisted in the basal portion, arising 1.5 mm or more below the lemma apices;

anthers 2-2.5 mm.

pubescent, with prominent veins, margins not bronze-tinged;

lower glumes 4-8.5 mm, (1)3-veined;

upper glumes 7-10 mm, 3(5)-veined, not mucronate;

lemmas 9.5-14 mm, lanceolate, rounded over the midvein, backs pilose, pubescent, or glabrous, margins pilose, not bronze-tinged, apices subulate to acute, entire;

awns 3-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3-6 mm.

= unknown.

= 14.