Flora of North America species comparison

30-60 cm, slender.

20-70 cm tall, to 3 mm thick, sometimes geniculate at the base.

pilose-pubescent to nearly glabrous;

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

usually smooth or scabridulous, sometimes slightly pubescent distally, not pilose at the throat;

auricles absent;

ligules 1-6 mm, densely hairy to ciliolate, acute to obtuse, erose;

blades 6-13 cm long, 6-8 mm wide, flat, both surfaces glabrous, sometimes scabrous.

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

branches appressed to spreading, sometimes flexuous.

9-20 cm long, 2-2.5 cm wide, dense;

lower branches shorter than 10 cm, 2-4 per node, erect, with 1-2 spikelets variously distributed.

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

20-40 mm, usually longer than the branches and pedicels, elliptic to lanceolate, strongly laterally compressed, crowded, overlapping, with 3-7 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;

lower glumes 8-12 mm, (3)5(7)-veined;

upper glumes 10-13 mm, 7(9)-veined, shorter than the lowest lemma;

lemmas 12-14 mm, lanceolate, laterally compressed, distinctly 9-11-veined, strongly keeled at least distally, more or less uniformly hairy, often with bronze hyaline margins, apices entire or with acute teeth shorter than 1 mm;

awns (2)4-7 mm;

anthers 2-4 mm.

= unknown.

= 56.