Flora of North America species comparison

4.5-55 cm, erect.

1-55 cm, erect to decumbent.

scabridulous, occasionally smooth;

ligules 1.2-8 mm, abaxial surfaces scabridulous, acute to subobtuse, becoming lacerate;

blades 0.3-13.5 cm long, 0.3-2.5 mm wide, antrorsely scabridulous, glabrous, apices prow-tipped.

cauline;

sheaths open for most of their length, glabrous, usually scabridulous, occasionally smooth;

auricles absent;

ligules membranous;

blades of the uppermost leaves greatly reduced.

1.2-13.5 cm long, 1.5-10 cm wide, open;

primary branches to 7.3 cm, ascending to divergent, antrorsely scabridulous, occasionally smooth;

pedicels 0.9-11.3 mm, apices enlarged.

open or contracted panicles, sometimes spikelike, with more than 1 spikelet associated with most nodes;

branches longer than 5 mm, capillary, appressed to strongly divergent;

pedicels capillary, appressed to divergent.

1.7-3.3(3.5) mm, silvery-green to stramineous or purplish;

rachillas usually not prolonged beyond the base of the distal floret, sometimes prolonged, vestigial.

1.5-3.8 mm, laterally compressed, with 2 bisexual florets, both usually awned, the lower floret sometimes unawned, occasionally both unawned;

rachillas glabrous, lowest segments about 0.2 mm, florets appearing opposite, usually not or scarcely extended beyond the base of the distal floret;

disarticulation above the glumes and beneath the florets.

subequal to equal, 1.3-3.3(3.5) mm, scabridulous on the upper 1/2;

callus hairs 0.2-0.4 mm;

lemmas 1.3-2.6 mm, apices bifid, sometimes only the upper lemma awned, awns 2.1-3.9 mm, straight or geniculate;

paleas 0.9-1.7 mm;

anthers 0.2-0.5 mm.

equal to subequal, longer than the florets, membranous, 1-3-veined, unawned;

calluses puberulent;

lemmas subcoriaceous, glabrous, scabridulous, 5-veined, apices bifid, awned or unawned, awns attached below midlength, usually geniculate, sometimes straight;

paleas membranous, 2-veined;

lodicules 2, free;

anthers 3;

ovaries glabrous.

0.9-1.5 mm long, 0.3-0.5 mm wide, abaxial surfaces grooved in the distal 1/2, adaxial surfaces grooved the entire length.

shorter than the lemmas, concealed at maturity, adhering to the lemmas and/or paleas, longitudinally grooved, dorsally compressed, x = 7.

= 14.