Flora of North America species comparison

10-80 cm, often geniculate at the base, much branched near the base;

internodes mostly scabridulous or smooth, always scabridulous below the nodes.

20-70 cm tall, less than 3 mm thick, erect, branched above;

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

often shorter than the internodes, glabrous, smooth or scabridulous;

ligules 1-2 mm, membranous to hyaline, truncate to obtuse;

blades 3-8.5(10) cm long, 1-2.5 mm wide, flat or loosely involute, scabrous abaxially, strigulose adaxially.

glabrous, margins hyaline, old sheaths not flattened, papery, or spirally coiled;

ligules 0.2-1.1 mm, membranous, truncate, sometimes ciliolate;

blades 2-8.5 cm long, 2-5 mm wide, flat, smooth or scabridulous.

6.5-13.5 cm long, 1-6.5 cm wide, not dense, often purplish;

branches 1.6-4 cm, ascending or diverging up to 80° from the rachises, spikelet-bearing to the base;

pedicels 2-6 mm, appressed to divaricate, antrorsely scabrous;

disarticulation above the glumes.

4.2-16.5 cm long, 0.2-1.5 cm wide, mostly exserted from the sheath;

primary branches 0.8-7.2 cm, ascending to appressed;

pedicels 0.6-3 mm, strigose.

2.5-5.5 mm, borne singly.

2.2-3.4 mm.

0.4-1.3 mm, exceeded by the florets, 1-veined, obtuse, often minutely erose;

lower glumes 0.4-1 mm;

upper glumes 0.6-1.3 mm;

lemmas 2.5-3.8(5.3) mm, narrowly lanceolate, mostly smooth, scabridulous distally, hairy on the calluses, lower 1/2 of the margins, and midveins, hairs 0.2-0.5 mm, apices acuminate, awned, awns 10-30 mm, straight to flexuous;

paleas 2.2-4.8 mm, narrowly lanceolate, acuminate;

anthers 0.3-1.2 mm, purplish.

shorter than the florets, veins scabridulous, unawned or awned, awns to 0.5 mm;

lower glumes 0.4-1.5 mm, veinless (rarely 1-veined), usually truncate to rounded, occasionally acute, sometimes notched;

upper glumes 0.8-1.9 mm, 1(2)-veined, acute to acuminate;

lemmas 2.2-3(3.4) mm, lanceolate, hairy on the calluses and lower portion of the margins and midveins, hairs shorter than 1.5 mm, apices scabridulous, acuminate, awned, awns 0.5-4 mm, straight;

paleas 2.2-3.1(3.4) mm, lanceolate, intercostal region shortly pilose on the lower 1/2, apices acuminate;

anthers usually not developed, occasionally 1 or 2 present, 0.3-0.9 mm, yellow.

1.7-2.5 mm, fusiform, reddish-brown.

1.4-1.6 mm, fusiform, brown.

panicles with 1-3 spikelets present in the axils of the lower leaves.

= 20, 40, 60.

= unknown.