Flora of North America species comparison

1-36 cm, erect.

1-55 cm, erect to decumbent.

usually scabridulous, occasionally smooth;

ligules 1.4-5.3 mm, abaxial surfaces scabridulous, acute, becoming lacerate;

blades (0.1) 0.25-5 cm long, 0.3-2.0 mm wide, antrorsely scabridulous, glabrous, 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.

(0.5)1-4.1 cm long, 0.3-0.7 cm wide, sometimes reduced to a single spikelet in depauperate specimens;

primary branches to 1.5 cm, appressed to the rachises, antrorsely scabridulous;

pedicels 0.7-3.2 mm, enlarged at the apices.

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.

2.8-3.8 mm, green and purple-tinged;

rachillas prolonged beyond the base of the distal floret.

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, antrorsely scabridulous, especially on the midveins;

lower glumes 2.8-3.6 mm, 1-3-veined;

upper glumes 2.7-3.8 mm, 3-veined;

callus hairs 0.3-0.5 mm;

lower lemmas 2.4-3.3 mm, apices bifid, teeth 0.3-0.5 mm, awned, awns 3-4.5 mm;

paleas 1.7-2.1 mm;

upper lemmas similar;

anthers 0.2-0.4 mm, yellow.

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.

1.3-1.7 mm long, 0.4-0.5 mm wide, glabrous, abaxial surfaces grooved 0.8-1 mm distally, 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.