Flora of North America species comparison

to 2.5 m, but as short as 20 cm in poor soils;

internodes not glaucous.

1.2-2.2 m;

internodes glaucous.

(1.3)2.3-3.1(4.7) mm wide, usually smooth;

ligules ciliate or not, cilia to 0.2 mm;

blades glaucous, glabrous, smooth.

sheaths usually smooth;

ligules ciliate, cilia 0.2-0.9 mm;

blades green, smooth or pubescent.

sheaths of inflorescence units (2)2.9-4.3(5.2) cm long, 1.5-3 mm wide;

peduncles (2)8-15(40) mm;

rames 1.3-3 cm, exerted.

sheaths of inflorescence units usually 2-2.5 mm wide;

peduncles shorter than 10 mm;

rames usually shorter than 2 cm, not exerted at maturity.

of lower glumes usually smooth below midlength, scabrous distally;

anthers often retained within the spikelets.

of lower glumes usually scabrous beyond midlength.