Flora of North America species comparison

100-200 cm tall, 3-5 mm thick, smooth.

smooth or scabridulous, weakly keeled;

ligules 1-1.5 mm, truncate;

blades to 45 cm long, 6-10 mm wide, abaxial surfaces smooth or scabrous, adaxial surfaces scabrous.

20-30 cm long, 7.5-14 cm wide, open, pyramidal;

branches 7.5-14 cm, spreading or reflexed, lax, with 16-80 spikelets;

pedicels 2-7 mm.

3.5-5.5 mm long, 2-3(3.5) mm wide, laterally compressed, oval in side view, with 3-5 florets.

tapering from below midlength to the narrowly (< 45°) acute apices, veins not extending to the apices;

lower glumes 0.8-1.5 mm;

upper glumes 1.8-2.2 mm;

rachilla internodes about 0.5 mm;

lemmas 2.2-2.7 mm, 0.9-1.1 mm wide in dorsal view, veins distinctly raised, usually smooth over and between the veins, sometimes scabridulous over the veins, apices acute, prow-shaped;

paleas slightly shorter than the lemmas, lengths 2-2.7 times widths, keels not winged, tips incurved, apices narrowly notched between the keels;

anthers 2, about 1.5 mm, dehiscent at maturity.

about 1.5 mm.

= 40.