Flora of North America species comparison

25-95 cm tall, 0.8-1.5 mm thick, erect or ascending;

internodes smooth, shiny, and glabrous for most of their length, scabridulous immediately below the nodes.

60-100 (150) cm, erect from the base, not conspicuously branched;

internodes mostly glabrous, sometimes puberulent below the nodes.

glabrous, margins hyaline;

ligules 0.3-1 mm, membranous, truncate, ciliolate;

blades 4-16 cm long, 2-7 mm wide, flat, glabrous, usually smooth, occasionally scabridulous.

glabrous or puberulent, rounded basally, becoming fibrous, not flat or spirally coiled, at maturity;

ligules 1.8-5(10) mm, membranous, firm, strongly decurrent, obtuse;

blades 20-50(80) cm long, 2-4 mm wide, flat or involute, smooth abaxially, scabrous adaxially.

4-18 cm long, 0.2-0.8 cm wide, narrow, usually exserted;

axillary panicles usually exserted, sometimes partially included in the subtending sheath;

primary branches 0.6-4 cm, ascending to appressed;

pedicels 0.3-1.6 mm, strigose.

15-50(60) cm long, 5-30 cm wide, longer than wide, diffuse;

primary branches 2-20 cm, capillary, spreading 30-100° from the rachises, naked basally, lower branches with 5-20 spikelets;

pedicels 4-50 mm, longer than the spikelets, capillary, flexible, widely divergent at maturity.

1.6-3 mm, erect, overlapping the next spikelet on the branch by 1/2 its length.

3-5 mm, often purplish, sometimes brownish or bronze.

equal to subequal, 1-2.5 mm, much shorter than the florets, scabridulous (particularly over the veins), 1-veined, narrowing from above the broad, overlapping bases to the acute apices, unawned or awned, awns to 1 mm;

lemmas 1.6-2.8 mm, lanceolate, hairy on the calluses, lower 1/2 of the midveins, and margins, hairs 0.3-0.5 mm, apices acuminate, unawned or awned, awns to 1 mm;

paleas 1.6-2.9 mm, lanceolate, basal 1/2 with hairs shorter than 1.

subequal, 1.5-3.3 mm, shorter than the florets, glabrous;

lower glumes 1-veined, unawned;

upper glumes usually 1-veined, rarely 3-veined, acute to acuminate, often erose, sometimes mucronate;

lemmas 3-5 mm, lanceolate, calluses shortly pubescent, apices acuminate, without setaceous teeth, usually unawned, if, as rarely, awned, awns 1-3 mm, clearly demarcated from the lemma bodies;

paleas 2-4.5 mm, lanceolate, acuminate, unawned;

anthers 1.5-2 mm, purple.

1-1.5 mm, fusiform, brown.

2-2.5 mm, narrowly elliptic, brownish.

mm, apices scabridulous, acuminate;

anthers 0.4-1 mm, yellow.

= 40.

= unknown.