Flora of North America species comparison

30-60 cm, slender.

30-70 cm, erect or ascending.

pilose-pubescent to nearly glabrous;

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

often densely hairy with soft, white hairs;

ligules 1-2 mm, hairy, obtuse, erose;

blades 10-30 cm long, 3-5 mm wide, glabrous or pubescent.

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

branches appressed to spreading, sometimes flexuous.

5-15 cm long, 2-9 cm wide, erect, densely contracted when immature, more open with age;

branches usually shorter than the spikelets, rigid, ascending to slightly spreading, slightly curved or straight.

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

20-50 mm, lanceolate, terete to moderately laterally compressed, often 2+ per node;

florets 7-20, bases concealed at maturity;

rachilla internodes concealed at maturity.

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.

pilose;

lower glumes 5-9 mm, 3-5-veined: upper glumes 8-12 mm, 5-7-veined;

lemmas 11-20 mm long, 1.8-2.5 mm wide, lanceolate, pilose, obscurely 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 6-12 mm, to 20 mm on some distal lemmas, divaricate when mature, arising 1.5 mm or more below the lemma apices;

anthers 1-1.5 mm.

equaling or slightly shorter than the paleas, thin, weakly inrolled or flat.

= unknown.

= 28, 42.