Flora of North America species comparison

(22)30-70 cm, erect or ascending.

80-110 cm, erect.

usually densely pilose;

upper sheaths sometimes pubescent or glabrous;

ligules 1-2.2 mm, pilose, obtuse, lacerate;

blades 10-20 cm long, 2-4 mm wide, usually pilose on both surfaces.

10-22 cm long, 4-13 cm wide, open, nodding;

branches usually longer than the spikelets, ascending to spreading or somewhat drooping, slender, flexuous, sometimes sinuous, often with more than 1 spikelet.

11-30 cm long, 4-20 cm wide, open, erect or nodding;

branches usually longer than the spikelets, ascending to widely spreading, slender, slightly curved or straight.

20-40 mm, lanceolate, terete to moderately laterally compressed;

florets 6-12, bases concealed at maturity;

rachilla internodes concealed at maturity.

10-25 mm, lanceolate, terete to moderately laterally compressed, often purple-tinged;

florets 4-10, bases concealed or visible at maturity;

rachilla internodes concealed or visible at maturity.

smooth or scabrous;

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

upper glumes 5-8 mm, 7-veined;

lemmas 7-9 mm long, 1.2-2.2 mm wide, lanceolate, coriaceous, smooth proximally, scabrous on the distal 1/2, obscurely (7)9-veined, rounded over the midvein, margins hyaline, 0.3-0.6 mm wide, obtusely angled above the middle, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 8-13 mm, strongly divergent at maturity, sometimes erect, twisted, flattened at the base, arising 1.5 mm or more below the lemma apices;

anthers 1-1.5 mm.

glabrous;

lower glumes 4-6 mm, 3-veined;

upper glumes 5-8 mm, 5-veined;

lemmas 7-9 mm long, 1.1-1.5 mm wide, lanceolate, obscurely 7-veined, rounded over the midvein, glabrous, coriaceous, margins slightly angled, inrolled or not at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 6-11 mm, straight, arising at varying distances below the lemma apices;

anthers 2.5-5 mm.

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

shorter than the paleas, weakly to strongly inrolled.

sheaths with dense, soft, appressed hairs;

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

blades 10-20 cm long, 2-6 mm wide, coarsely pilose on both surfaces.

= 14.

= 14.