Flora of North America species comparison

20-62 cm, erect or ascending.

40-190 cm, erect;

nodes 2-4, usually pubescent;

internodes usually pubescent.

densely pilose;

ligules 0.5-2 mm, hairy, obtuse, erose;

blades 3-13 cm long, 2-4 mm wide, pilose to pubescent on both surfaces.

with long, stiff, retrorse hairs, at least on the lower portion, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles present;

ligules 2-3.5 mm, glabrous or sparsely pilose, rounded to truncate, erose;

blades 10-60 cm long, 6-15 mm wide, flat, drooping, glabrous or sparsely hairy.

5-15 cm long, 3-7 cm wide, open, secund, nodding;

branches sometimes longer than the spikelets, curved to reflexed.

15-40 cm long, open, lax, drooping;

branches spreading or drooping.

15-27 mm long, 8-12 mm wide, ovate, laterally compressed;

florets 7-15, bases concealed at maturity;

rachilla internodes concealed at maturity.

20-40 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 3-10 florets.

smooth or scabridulous;

lower glumes 5-6 mm, 3-5-veined;

upper glumes 6-8 mm, 7-9-veined;

lemmas 9-10 mm long, 6-8 mm wide, inflated, obovate or rhombic, coriaceous, smooth or scabridulous, obscurely 9-veined, rounded over the midvein, margins hyaline, 1-1.3 mm wide, abruptly angled, not inrolled at maturity, apices acute to obtuse, bifid, teeth shorter than 1 mm;

awns usually absent, sometimes to 1 mm, arising less than 1.5 mm below the lemma apices;

anthers 0.7-1 mm.

glabrous, scabridulous over the veins;

lower glumes 5-8 mm, 1-veined;

upper glumes 8-11 mm, 3-veined, mucronate;

lemmas 10-14 mm, lanceolate, rounded over the midvein, margins and at least the lower 1/2 of the backs pubescent, apices acute, entire or emarginate, lobes shorter than 1 mm;

awns 4-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2.5-4 mm.

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

= 14.

= 14, 28, 42.