Flora of North America species comparison

17-100 cm, erect.

(3.3)5.5-60 cm, erect, glabrous, with (2)3-4 nodes.

mostly cauline or somewhat basally concentrated;

sheaths smooth;

ligules 2.3-7 mm, dorsal surfaces scabrous, apices acute, usually lacerate;

blades 6-20 cm long, 2-5 mm wide, 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.

7-22 cm long, 1.5-5.5(7) cm wide, lanceolate to narrowly ovate, more or less open to dense, lowest node with 2-15 branches;

branches scabridulous, ascending to more or less appressed, mostly branching at or above midlength, some branching near the base, lower branches 1-5 cm;

pedicels 0.5-6 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, yellow-green, often tinged with purple.

purple to green, shiny.

equal to subequal, 2.5-4 mm, 1-veined, scabrous to scabridulous on the midvein, at least distally, sometimes also sparsely scabridulous over the back, acute to acuminate;

callus hairs (0.8)1-2 mm, abundant, conspicuous;

lemmas 2-3 mm, smooth, translucent to opaque, 5-veined, veins prominent at least distally, apices acute, entire or erose, sometimes toothed, teeth to about 0.2 mm, unawned;

paleas absent, or to 0.2 mm and thin;

anthers 3,1.5-2.3 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.

1.5-2 mm.

0.7-1.2 mm;

endosperm soft.

= 42.

= 28.