Flora of North America species comparison

50-300 cm, erect, branching;

nodes glabrous.

70-200 cm, slender, erect, 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.

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.

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

rachises terete, densely 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.

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.

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.

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.

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.

= 14.

= unknown.