OregonFlora species comparison

(3)5–120 cm tall, usually erect.

sheaths open, usually glabrous or scabrous;

ligules membranous, truncate to acute; erose or lacerate, rarely entire;

blades flat, folded, or involute, usually smooth and glabrous, sometimes minutely scabrous.

panicles, narrowly cylindrical to very open and diffuse;

disarticulation above the glumes and beneath the florets, sometimes also at the panicle base.

laterally compressed, lanceolate to narrowly oblong or ovate, with 1 floret (rarely 2);

rachilla not prolonged beyond the floret.

2; longer than the lemmas, 1(3)-veined, glabrous;

veins often scabrous;

tips acute to acuminate or awn-tipped;

lower glumes usually slightly longer than the upper glumes.

with hard or liquid endosperm.

blunt, glabrous or hairy.

membranous or hyaline, usually smooth and glabrous, rarely pubescent or tuberculate, 3–5-veined;

veins extremely faint, not convergent, sometimes excurrent as 2–5 tiny teeth;

tips acute or obtuse to truncate, sometimes erose, awned or awnless;

lemma awns arising from near the lemma bases to near the tip, usually bent.

absent; minute, or as long as the lemmas; hyaline, often veinless.

(1)3.