Flora of North America species comparison

30-60 cm, slender.

40-90 cm, erect;

nodes (3)4-7(8), these and the internodes pubescent or glabrous.

pilose-pubescent to nearly glabrous;

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

glabrous or pilose, midrib of the culm leaves abruptly narrowed just below the collar;

auricles often present on the lower leaves;

ligules to 1 mm, truncate;

blades 14-22(26) cm long, to 6 mm wide, flat, glabrous or pilose, not glaucous.

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

branches appressed to spreading, sometimes flexuous.

10-20 cm, open, nodding;

branches ascending or spreading.

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

(14)15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-12 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.

usually pubescent, rarely glabrous;

lower glumes 5-6 mm, 1-3-veined;

upper glumes 6-8 mm, 3-veined, sometimes mucronate;

lemmas 7-10 mm, elliptic to lanceolate, rounded over the midvein, backs and margins pubescent, apices acute to obtuse, entire;

awns 1-3(5) mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4 mm.

= unknown.

= 14.