Flora of North America species comparison

9-85 cm, erect, sometimes decumbent at the base, sometimes rooting at the lower nodes, usually with 4-7 nodes.

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

basal and cauline;

sheaths smooth or scabrous;

ligules 1-4.8(7.5) mm, dorsal surfaces scabrous, apices truncate to obtuse, erose-lacerate, sometimes ciliolate;

blades 2-12 cm long, 2-10 mm wide, upper blades broader than those below, 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.

2-10 cm long, 0.5-2 cm wide, narrow and spikelike to dense, lobed-lanceolate, bases exserted or enclosed by the upper sheaths at maturity;

branches to 1.5 cm, scabrous, appressed, branching at the base and mostly hidden by the spikelets;

pedicels about 0.4-3 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 to narrowly ovate, yellowish, sometimes tinged with purple, or greenish purple.

lanceolate, usually purplish, sometimes green to yellowish green.

generally equal, 2-3.3 mm, 1-veined, densely scabrous, aculeolate on the veins, narrowly acute to acuminate or somewhat mucronate, mucros to about 0.5 mm;

callus hairs to 0.3 mm, usually dense;

lemmas 1.5-2.1 mm, smooth or scabridulous, translucent, (3)5-veined, veins prominent to obscure, sometimes prominent only distally, apices acute to obtuse, veins usually extended as teeth up to 0.3 mm, unawned or awned from above midlength, awns to 3.5 mm, straight, readily deciduous;

paleas 0.3-0.7 mm, thin;

anthers 3, 0.5-2 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.

1-1.5 mm;

endosperm solid.

0.6-0.8 mm.

= 42.

= 14.