Flora of North America species comparison

10-70 cm, decumbent below;

internodes cinereous-lanate, glabrous, or scabrous for most of their length, always cinereous-lanate below the nodes.

10-35 cm, erect;

internodes strigulose.

longer than the internodes, cinereous-lanate below, glabrous and smooth or scabridulous distally;

ligules 0.2-1 mm, densely ciliate, obtuse, with lateral lobes;

blades 2-8 cm long, 1-2.2 mm wide, flat to tightly involute, scabrous abaxially, hirsute adaxially, stiff, pungent.

shorter or longer than the internodes, strigulose;

ligules 0.9-2.5 mm, hyaline, acute to obtuse, irregularly toothed to lacerate;

blades 1-6(8) cm long, 0.8-2 mm wide, flat or involute, scabrous and sparsely strigulose on both surfaces.

(7)8-16(19) cm long, (2)4-14 cm wide, open;

primary branches 1.5-8 cm, capillary, straight, lower branches diverging 70°-90° from the rachises in mature plants, often appearing fascicled in immature plants;

pedicels 10-25 mm.

9-21 cm long, 2-7 cm wide;

primary branches 12-60 mm, occasionally capillary, narrowly ascending or diverging up to 70° from the rachises;

pedicels 2-7 mm, usually longer than the florets, straight to somewhat curved, rarely bent as much as 90°;

disarticulation above the glumes.

2.6-4.5 mm.

1.3-2 mm.

equal, 1.2-3 mm, purplish near the base, smooth or scabridulous distally, 1-veined, acuminate or acute, unawned or awned, awns to 1 mm;

lemmas 2.6-4.5 mm, lanceolate, purplish, scabridulous distally and on the margins, apices acuminate, awned, awns 1-1.5(2) mm, straight;

paleas 2.6-4.5 mm, lanceolate, glabrous, acuminate, 2-awned, awns to 1 mm;

anthers 1.8-2.6 mm, purplish.

sparsely strigulose, particularly on the margins, 1-veined, acute to acuminate;

lower glumes 0.8-1.2 mm;

upper glumes 0.9-1.5 mm, bases slightly wider than the lower glumes;

lemmas 1.3-2 mm, lanceolate, purplish to brown, shortly appressed-pubescent on the lower 1/2 of the midveins and margins, apices acute to acuminate, awned, awns 0.1-1(2) mm;

paleas 1.3-2 mm, oblong-elliptic, minutely appressed-pubescent on the lower 1/2, apices acute;

anthers 0.4-0.5 mm, purplish.

1.8-2.5 mm, fusiform, brownish.

0.8-1 mm, fusiform, brownish.

= 26, 42, 60.

= 40.