Flora of North America species comparison

40-150 cm, erect, pubescent beneath the panicle;

nodes glabrous.

70-200 cm, slender, erect, branching;

nodes glabrous.

glabrous;

ligules 0.7-1 mm, of hairs;

blades 3.5-30 cm long, 8-24 mm wide, flat, sparsely pubescent, abruptly rounded or cordate basally;

lower blades with a 0.5-13 cm pseudopetiole.

green, sometimes glaucous;

sheaths glabrous, margins ciliate;

ligules 0.5-1.1 mm;

blades 20-65 cm long, 2-3.5 mm wide, convolute or folded, scabrous, midvein noticeably thickened.

(6)8-32 cm long, 40-52 mm wide, erect or arching, pink to dark burgundy;

rachises pubescent.

terminal and axillary, 3-8 cm, on long peduncles, fully exerted from the sheaths;

rachises terete, hispid;

disarticulation beneath the primary bristles, fascicle axes persistent.

4.5-7 mm, sessile or pedicellate;

pedicels to 0.1 mm;

lower glumes absent or to 0.3 mm, veinless;

upper glumes 1.2-3.6 mm, (0)1-veined;

lower florets usually sterile, sometimes staminate;

lower lemmas 4-6 mm, 3-veined, acuminate, midvein excurrent to 0.7 mm;

lower paleas usually absent, if present, to 4.4 mm;

anthers absent or 2.3-2.4 mm;

upper lemmas 4.5-6.7 mm, attenuate, 5-veined, midvein excurrent to 0.7 mm, margins glabrous;

anthers 2.1-2.7 mm.

2.5-3.2 mm, sessile, green to purple.

veinless, truncate or emarginate;

lower glumes 0.2-0.3 mm;

upper glumes 0.3-0.4 mm;

lower florets sterile;

lower lemmas 2.5-3.2 mm, strigulose above, 5-7-veined;

lower paleas absent;

upper lemmas 2.3-3 mm, sparsely puberulent, 5-veined;

anthers 3, 1.5-1.9 mm.

8-10 per cm;

fascicle axes 2.3-4.5 mm, with 1-4 spikelets;

outer bristles 28-65, 0.9-19 mm;

inner bristles 8-16, 8-27 mm, ciliate;

primary bristles 26.5-34.3 mm, ciliate, noticeably longer than the other bristles.

14-24 per cm;

fascicle axes 0.4-0.6 mm, with 1 spikelet, outer and inner bristles absent;

primary bristles 3.8-30 mm, scabrous.

= 27.

= unknown.