Flora of North America species comparison

17-100 cm, erect.

10-60 cm, erect or geniculate at the base, slender, smooth, with 1-2(4) nodes.

smooth;

ligules 0.6-5 mm, dorsal surfaces scabridulous, apices acute to obtuse, entire or lacerate to erose;

blades 2-10 cm long, 1-3 mm wide, usually flat, sometimes involute, sometimes bristlelike, adaxial surfaces scabrous, abaxial surfaces sometimes scabrous.

mostly cauline or somewhat basally concentrated;

sheaths smooth;

ligules 2.3-7 mm, dorsal surfaces scabrous, apices acute, usually lacerate;

blades 6-20 cm long, 2-5 mm wide, flat.

7-22 cm long, 1.5-5.5(7) cm wide, lanceolate to narrowly ovate, more or less open to dense, lowest node with 2-15 branches;

branches scabridulous, ascending to more or less appressed, mostly branching at or above midlength, some branching near the base, lower branches 1-5 cm;

pedicels 0.5-6 mm.

2-15 cm long, (0.8)1-5.5(8) cm wide, lanceolate to oblong, somewhat open, often contracted after anthesis, lowest node with (1)3-8 branches;

branches scabrous, readily visible, more or less erect, branched mostly at or below midlength, spikelets closely clustered, lower branches 3-5 cm;

pedicels 0.5-2 mm.

lanceolate, yellow-green, often tinged with purple.

lanceolate to narrowly oblong, greenish, purplish, or brownish.

equal to subequal, 2.5-4 mm, 1-veined, scabrous to scabridulous on the midvein, at least distally, sometimes also sparsely scabridulous over the back, acute to acuminate;

callus hairs (0.8)1-2 mm, abundant, conspicuous;

lemmas 2-3 mm, smooth, translucent to opaque, 5-veined, veins prominent at least distally, apices acute, entire or erose, sometimes toothed, teeth to about 0.2 mm, unawned;

paleas absent, or to 0.2 mm and thin;

anthers 3,1.5-2.3 mm.

equal to subequal, 2-4 mm, membranous, acute to acuminate;

lower glumes 1-veined, scabrous to scabridulous over the midvein;

upper glumes usually shorter than the lower glumes, 1(3)-veined, almost smooth;

callus hairs to 0.1 mm, sparse;

lemmas 1.5-2.4 mm, about 3/4 the length of the glumes, bases minutely pubescent, glabrous and smooth elsewhere, translucent to opaque, 5-veined, veins usually prominent distally, apices blunt, entire, usually awned from near the base, awns 2-4.5 mm, geniculate, rarely unawned;

paleas to about 0.2 mm;

anthers 3,1-1.8 mm.

1.5-2 mm.

0.8-1.3 mm;

endosperm solid.

= 42.

= 28.