Flora of North America species comparison

10-60(100) cm, decumbent-ascending, bases somewhat compressed-keeled;

internodes glabrous, shiny below the nodes.

10-40 cm, erect;

internodes mostly glabrous, strigulose below the nodes.

glabrous, margins hyaline;

ligules 0.2-1 mm, firm, truncate, ciliate, without lateral lobes;

blades 2-7(11) cm long, 1-2.8(4) mm wide, flat, occasionally conduplicate, smooth or scabridulous abaxially, scabridulous adaxially, margins and midveins not conspicuously thickened, greenish, apices acute, not sharp.

usually longer than the internodes, scabridulous or puberulent, keeled;

ligules 1.5-2.5 mm, membranous, acute, erose;

blades (1)2-5.5(8) cm long, 0.8-2 mm wide, usually involute, occasionally flat, scabridulous abaxially, villous adaxially.

6-21 cm long, 4-16 cm wide, broadly ovoid, open;

primary branches 3-12 cm, capillary, lower branches spreading 30-90° from the rachises, never appearing fascicled;

pedicels 3-14 mm, longer than the spikelets.

14-24 cm long, 3-7 cm wide, narrowly pyramidal, open;

primary branches 2-7 cm, ascending, diverging less than 40° from the rachises;

pedicels 1-2(3) mm, usually shorter than the florets, appressed;

disarticulation above the glumes.

1.2-2.1 mm, occasionally with 2 or 3 florets.

1.7-3 mm.

equal, 0.6-1.7 mm, purplish, scabridulous, particularly on the veins, 1-veined, apices acute;

lemmas 1.2-2.1 mm, lanceolate to oblong-elliptic, somewhat plumbeous, glabrous, usually smooth, occasionally scabridulous near the apices, apices acute, unawned or mucronate, mucros to 0.3 mm;

paleas 1.2-2.1 mm, lanceolate, glabrous, acute;

anthers 1-1.3 mm, greenish-yellow to purplish at maturity.

subequal, 1.3-1.8 mm, sparsely hirsute, 1-veined;

lower glumes 1.3-1.6 mm, acuminate, sometimes awned, awns to 0.5 mm;

upper glumes 1.4-1.8 mm, wider than the lower glumes, acuminate;

lemmas (1.7)1.9-2.5 mm, lanceolate, purplish or yellowish to light brownish, appressed-pubescent on the midveins and margins, hairs to 0.5 mm, apices awned, awns 1.2-3.5 mm, delicate;

paleas 1.8-2.4 mm, oblong-elliptic, glabrous;

anthers 0.4-0.6 mm, purplish.

0.8-1 mm, fusiform, brownish.

1.3-2.3 mm, fusiform to dorsally compressed, light brownish.

= 20, 22, 28.

= 40.