Flora of North America species comparison

20-90 cm, erect or decumbent, puberulent below the panicle.

20-60 cm, erect or geniculately ascending.

softly pilose, hairs often retrorse or spreading;

auricles absent;

ligules 2-3 mm, glabrous, obtuse, lacerate or erose;

blades 3.5-27 cm long, 1-9 mm wide, both surfaces pilose.

13-25 cm long, 2-12 cm wide, erect to spreading;

branches 1-7 cm, stiffly erect to ascending or spreading, with 1 or 2 spikelets.

7-20 cm long, 4-8 cm wide, racemose, open, nodding, often with few spikelets, usually secund;

branches sometimes longer than the spikelets, ascending-spreading, flexuous, slightly curved, usually with 1 spikelet.

25-70 mm, sides parallel or diverging distally, moderately laterally compressed, with 4-11 florets.

15-70 mm, broadly oblong or ovate-lanceolate, terete to moderately laterally compressed;

florets 8-30, bases concealed at maturity;

rachilla internodes concealed at maturity.

smooth or scabrous, margins hyaline;

lower glumes 15-25 mm, 1-3-veined;

upper glumes 20-35 mm, 3-5-veined;

lemmas 20-35 mm, linear-lanceolate, scabrous, 7-veined, rounded over the midvein, margins hyaline, apices bifid, acuminate, teeth 3-5 mm;

awns 30-65 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

smooth or scabrous;

lower glumes 4.5-7 mm, 3-5(7)-veined;

upper glumes 6-8 mm, 7-veined;

lemmas 8-11 mm long, 2-2.4 mm wide, lanceolate, chartaceous, smooth or scabridulous, 7-9-veined, rounded over the midvein, margins hyaline, 0.6-0.9 mm wide, strongly angled above the middle, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 8-10 mm, flattened and sometimes twisted at the base, divaricate at maturity, arising 1.5 mm or more below the lemma apices;

anthers 1-1.3 mm.

equaling the paleas, thin, weakly inrolled or flat.

sheaths densely pilose;

ligules 1-1.5 mm, hairy, obtuse, erose, ciliolate;

blades 5-15 cm long, 4-6 mm wide, densely pilose on both surfaces.

= 42, 56.

= 14.