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.

10-70 cm, erect, sometimes decumbent at the base, sometimes rooting at the lower nodes, with 3-7 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.

usually cauline;

sheaths usually smooth, sometimes scabridulous;

ligules 1-6 mm, dorsal surfaces scabrous, apices truncate to rounded or acute, often lacerate to erose;

blades 1.5-11.5 cm long, 1-6 mm wide, flat, becoming involute.

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.

5-20 cm long, 0.4-6(8) cm wide, lanceolate to narrowly ovate, open to contracted, exserted from the upper sheaths at maturity, lowest node with 1-8 branches;

branches scabrous to scabridulous, usually ascending, branching below midlength, the majority spikelet-bearing to the base, lower branches 2-5 cm;

pedicels 0.5-7 mm.

lanceolate to narrowly ovate, yellowish, sometimes tinged with purple, or greenish purple.

lanceolate to narrowly ovate, green to yellowish green or yellow, tinged with purple.

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.

equal to subequal, 2-3.5 mm, scabrous over the midvein and sometimes also sparsely over the body, 1(3)-veined, acute to acuminate;

callus hairs to 0.3(1) mm, sparse;

lemmas 1.5-2.5 mm, smooth or scabridulous or warty, 5-veined, veins prominent throughout or only distally, apices acute, entire or the veins excurrent to about 0.2 mm, usually unawned, rarely awned from below the apices, awns to 0.5(2.7) mm, straight;

paleas absent, or to 0.2 mm and thin;

anthers 3, 0.7-1.8 mm.

1-1.5 mm;

endosperm solid.

1-1.5 mm;

endosperm solid.

= 42.

= 42, 56.