Flora of North America species comparison

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

internodes not glaucous.

60-160 cm;

internodes not glaucous.

(2)2.5-3.4(4.7) mm wide, scabrous;

ligules sometimes ciliate, cilia to 0.3 mm;

blades green, usually scabrous.

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 2.5-3.4 mm wide;

peduncles (4)11-35(60) mm;

rames usually 2.1-2.9 cm, exerted.

of lower glumes usually smooth below midlength, scabrous distally;

anthers often retained within the spikelets.

of lower glumes usually smooth below midlength, scabrous distally;

anthers eventually deciduous.