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.

8-45 cm, erect.

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 mostly cauline, sometimes mostly basal;

sheaths glabrous or pubescent;

upper sheaths usually inflated;

ligules 1.4-4.5 mm, dorsal surfaces scabridulous, apices truncate to acute, lacerate to erose;

blades 3-15 cm long, 0.7-2.5 mm wide, flat, becoming involute, finely scabrous.

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.

2-12 cm long, 0.4-2 cm wide, cylindrical, spikelike, dense, occasionally lobed or interrupted near the base, appearing bristly from the awns, usually exserted from the upper sheaths at maturity;

branches 0.3-1.5 cm, scabrous to scabridulous, ascending to appressed, spikelet-bearing to the base and hidden by the spikelets;

pedicels 0.3-3 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.

equal to subequal, 2.5-5 mm, scabrous over the midvein and often scabridulous on the body, 1-veined, apices narrowly acuminate to awn-tipped, awns to 1.5 mm;

callus hairs to 0.5(1) mm, usually dense;

lemmas 1.5-2.3 mm, scabrous, translucent to opaque, 5-veined, veins prominent distally, apices acute, veins extended into 2(4) teeth, teeth 0.1-0.5 mm, awned from about midlength or above, awns 3.5-8 mm, geniculate;

paleas absent, or to 0.2 mm and thin;

anthers 3, 0.4-0.6 mm, often retained at the apices of the caryopses.

1-1.5 mm;

endosperm solid.

0.9-1.3 mm;

endosperm soft.

= 42.

= 56.