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.

(3.3)5.5-60 cm, erect, glabrous, with (2)3-4 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 basal or evenly distributed;

sheaths glabrous, scabridulous;

ligules 2-6.2 mm, membranous, scabridulous dorsally, apices acute to more or less truncate, erose to lacerate;

blades 4-19 cm long, 0.5-4 mm wide, involute or flat, scabrous or smooth over the veins.

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.

1.5-14 cm long, 0.5-1.5 cm wide, lanceoloid, somewhat spikelike, dense to somewhat open, exserted at anthesis;

branches appressed, shorter than 2 cm;

pedicels 0.7-3(4.5) mm, scabrous.

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

purple to green, shiny.

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, 2-3.5 mm, 1-veined, keeled, keels and back usually smooth, occasionally scabrous, apices acute, muticous;

lower glumes wider than the upper glumes;

calluses with 2 tufts of hair to 0.3 mm;

lemmas 1.4-1.9 mm, glabrous, 5-veined, veins evident, apices truncate to acute, microdenticulate, teeth to about 0.1 mm, dorsally awned from midlength or below, awns 2-3.5 mm, exserted, twisted, geniculate, scabridulous;

paleas 0.1-0.2 mm, hyaline, linear;

anthers 3, 0.5-1 mm.

1-1.5 mm;

endosperm solid.

0.7-1.2 mm;

endosperm soft.

= 42.

= 28.