Flora of North America species comparison

(8)15-60 cm, erect from a geniculate base, sometimes rooting at the lower nodes, with (2)4-7 nodes.

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

mostly cauline;

sheaths smooth;

ligules longer than wide, dorsal surfaces usually scabrous, rarely smooth, apices usually rounded, acute to truncate, erose to lacerate, basal ligules 0.7-4 mm, upper ligules 3-7.5 mm;

blades 2-10 cm long, 2-6 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.

(3)4-20 cm long, less than 1/2 the length of the culm, 0.5-3(6) cm wide, narrowly contracted, dense, oblong to lanceolate, exserted from the sheaths at maturity, lowest node with 1-7 branches;

branches scabrous, ascending to appressed, except briefly spreading during anthesis, usually some branches at each node spikelet-bearing to the base, lower branches 2-6 cm;

pedicels 0.3-3.3 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, green and slightly to strongly suffused with purple.

lanceolate, usually purplish, sometimes green to yellowish green.

subequal to unequal, 1.6-3 mm, lanceolate, 1-veined, sometimes scabridulous distally, at least on the midvein, acute to acuminate or apiculate;

callus hairs to 0.5 mm, sparse;

lemmas 1.4-2 mm, opaque to translucent, smooth, 5-veined, veins obscure or prominent distally, apices acute to obtuse, entire or the veins excurrent to about 0.1 mm, usually unawned, rarely with a subapical straight awn to about 1 mm;

paleas 0.7-1.4 mm, veins visible;

anthers 3, 0.9-1.4 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.

0.9-1.3 mm;

endosperm solid.

0.6-0.8 mm.

= 28, 35,42.

= 14.