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.

6-70 cm, erect, with 2-5 nodes.

smooth;

ligules 0.5-5 mm, usually scabridulous, dorsal surfaces sometimes smooth, apices acute to obtuse, erose-lacerate, sometimes ciliolate;

blades 1-4.5 cm long, 0.5-1(2) mm wide, flat or weakly involute.

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.

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.

1-5 cm long, 0.5-1.5 cm wide, cylindrical, spikelike, dense, sometimes interrupted near the base, usually well exserted from the upper sheaths;

branches scabridulous, ascending to appressed, mostly hidden by the spikelets, lower branches 0.5-2.5 cm;

pedicels 0.5-4(6.3) mm.

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

lanceolate, greenish to yellowish, 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.

subequal, 5-7 mm, scabrous over the midvein, often sparsely scabridulous over the body, 1(3)-veined, apices narrowly acuminate to awn-tipped to 2 mm;

callus hairs to 0.7 mm, abundant;

lemmas 2.5-4 mm, scabridulous over the veins and sometimes over the body, opaque to translucent, 5-veined, veins prominent distally, apices acute, veins extended into 2 teeth, teeth 0.2-1.5 mm, awned from about midlength, awns (5)8-10 mm, more or less geniculate;

paleas absent or to 0.9 mm;

anthers 3, 0.4-0.7 mm.

1-1.5 mm;

endosperm solid.

1.6-1.8 mm.

= 42.

= 42.