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.

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.

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;

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

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

4-18 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.

2.5-5.5 mm, borne singly.

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

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.

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.

1.7-2.5 mm, fusiform, reddish-brown.

1-1.5 mm, fusiform, brown.

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

mm, apices scabridulous, acuminate;

anthers 0.4-1 mm, yellow.

= 20, 40, 60.

= 40.