Flora of North America species comparison

30-60 cm, slender.

50-100 cm, erect;

nodes (1)2-3, usually glabrous, rarely pubescent;

internodes usually glabrous, rarely pubescent.

pilose-pubescent to nearly glabrous;

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

glabrous or pilose;

auricles absent;

ligules to 1.5 mm, glabrous, truncate, lacerate;

blades 10-20 cm long, 2-6 mm wide, often involute or folded, glabrous or sparingly hairy.

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

branches appressed to spreading, sometimes flexuous.

10-20 cm, erect, contracted;

branches erect or ascending.

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

15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 5-8(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.

glabrous;

lower glumes 7-9 mm, 1-veined;

upper glumes 9-11 mm, 3-veined;

lemmas 10-13(15) mm, lanceolate, rounded over the midvein, backs and margins glabrous or sparsely pubescent, apices subulate to acute, entire;

awns 5-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 4-6.5 mm.

= unknown.

= 56.