Flora of North America species comparison

17-100 cm, erect.

10-75 cm, erect or geniculate, with 2-7 nodes.

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.

mostly cauline;

sheaths scabrous;

ligules 1-6 mm, dorsal surfaces scabridulous, apices acute to rounded, erose to lacerate;

blades 5-15 cm long, 1-4 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.

3-30 cm long, (2)5-20 cm wide, oblong to ovate, diffuse, usually over 1/2 the length of the culm, lowest node with (2)3-18 branches;

branches scabrous, erect to spreading, lower branches 4-15 cm;

pedicels (2.5)4-15 mm, much longer than the spikelets.

lanceolate, yellow-green, often tinged with purple.

lanceolate, usually purplish, sometimes green to yellowish green.

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.

subequal, 1.3-2.1 mm, 1-veined, sparsely aculeolate on the veins, obtuse;

calluses glabrous;

lemmas 0.5-0.8 mm, transparent, thin, veins scarcely visible, smooth and glabrous or rarely hairy, apices truncate to rounded or acute, toothed or erose, usually unawned, rarely awned from near the base;

paleas 0.4-0.7 mm, about as long as the lemmas and of similar texture;

anthers 3,1-1.4 mm.

1.5-2 mm.

0.6-0.8 mm.

= 42.

= 14.