Flora of North America species comparison

30-60 cm, slender.

50-100 cm, erect or spreading;

nodes 5-7, pilose or pubescent;

internodes glabrous.

pilose-pubescent to nearly glabrous;

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

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.

20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 5-10 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.

usually pilose or pubescent, rarely glabrous;

lower glumes 6-8 mm, 1-veined;

upper glumes 8-8.5 mm, 3-veined, mucronate;

lemmas 10-12 mm, elliptic to lanceolate, rounded over the midvein, backs and margins pilose or pubescent, apices acute to obtuse, entire;

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

anthers 1.5-3 mm.

sheaths pubescent or pilose, throats pilose;

upper sheaths pubescent or glabrous, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 1-2 mm, glabrous, truncate or obtuse;

blades 20-30 cm long, (4)7-11 mm wide, flat, both surfaces pilose or the abaxial surface glabrous.

= unknown.

= 28.