Flora of North America species comparison

25-120 cm, wiry, erect to sprawling, unbranched.

basal and cauline;

sheaths usually longer than the internodes, glabrous;

collars glabrous or strigillose;

ligules less than 0.5 mm;

blades 5-40 cm long, 1-2.5 mm wide, flat to folded, straight to lax at maturity, adaxial surfaces with scattered, 1.5-3 mm hairs near the ligule.

paniculate, 15-40 cm long, (8)10-35(45) mm wide;

rachis nodes glabrous or strigillose;

primary branches 5-25 cm, remote, stiffly ascending to divaricate, with axillary pulvini, usually naked near the base;

secondary branches and pedicels usually appressed.

usually congested.

9-15 mm, subequal, 1-veined, acuminate;

calluses 1-1.2 mm;

lemmas 9-15 mm long, smooth to tuberculate-scabrous, narrowing to slightly keeled, usually not twisted, 0.1-0.2 mm wide apices, junction with the awns not evident;

awns not disarticulating at maturity, unequal or almost equal;

central awns 8-25(30) mm, straight to arcuate at the base;

lateral awns absent or to 0-23 mm;

anthers 3, 1.2-2.4 mm.

6-8 mm, light brownish.

= 22, 24.