Flora of North America species comparison

50-300 cm, erect, branching;

nodes glabrous.

1.5-2(4) m, decumbent, geniculate, branching;

nodes glabrous.

glabrous or pubescent, with or without ciliate margins;

ligules 2-5 mm;

blades 15-100 cm long, 7-70 mm wide, flat, glabrous or pubescent.

green;

sheaths glabrous;

ligules 0.5-1.5 mm;

blades 23-40 cm long, 7-12 mm wide, flat, glabrous.

terminal, 4-200 cm long, 2-70 mm wide, fully exerted from the sheaths, erect;

rachises terete, densely pubescent.

terminal, 15-22 cm long, 15-21 mm wide, fully exerted from the sheaths, flexible, drooping, green;

rachises terete, puberulent.

3-7 mm;

pedicels 0.6-1.8 mm;

lower glumes absent or to 1.5 mm, veinless;

upper glumes 0.5-3.5 mm, 3-5-veined;

lower florets staminate or sterile;

lower lemmas 1.5-6 mm, glabrous, 3-7-veined, margins ciliate;

lower paleas vestigial or fully developed, margins ciliate;

anthers 2.2-2.5 mm, penicillate;

upper florets coriaceous, shiny;

upper lemmas 4.3-7 mm, 5-7(9)-veined, margins ciliate;

upper paleas 3.4-3.9 mm, pubescent, at least near the base, margins ciliate;

anthers 2-2.2 mm, penicillate.

5.2-6.6 mm, sessile;

lower glumes 1.7-2.9 mm, 1-veined;

upper glumes 4.5-6.3 mm, about as long as the spikelets, (7)9-veined;

lower florets sterile;

lower lemmas 4.8-6 mm, 7-veined, acuminate to attenuate, midvein excurrent for 0-0.6 mm;

lower paleas absent;

upper lemmas 4.9-6 mm, 5-veined, acuminate to attenuate, midvein excurrent for 0-0.6 mm;

anthers 1.3-1.7 mm.

2-5.5 mm long, 1.6-3.2 mm wide, protruding from the lemma and palea at maturity.

33-160 per cm;

fascicle axes 1-28 mm, persistent, with 1-9 spikelets;

outer bristles 44-131, 0.5-6 mm;

inner bristles 6-19, 4-6 mm, plumose;

primary bristles 5.5-6.3, ciliate, sometimes noticeably longer than the other bristles.

24-49 per cm;

fascicle axes 0.4-0.5 mm, with 1 spikelet;

most bristles only slightly longer than the spikelets;

outer bristles 27-41, 2.4-8.5 mm;

inner bristles 3-5, 6.2-11 mm, scabrous;

primary bristles 7.6-11.8 mm, not noticeably longer than the other bristles, scabrous.

= 14.

= 36.