OregonFlora species comparison

much branched above the base, with solid internodes.

erect or bent at base, usually pith-filled, sometimes hollow;

nodes glabrous or with straight hairs less than 0.5 mm.

sheaths glabrous;

ligules about 0.5 mm, with a fringe of dense hairs;

blades 2–14 cm × 1–2.5 mm; flat to involute.

basal and cauline;

sheaths open, ligules of hairs or membranous with marginal cilia;

blades flat to involute.

panicles, 5–15(20) × 0.5–3 cm;

branches erect to ascending.

panicles, sometimes racemes or spikes.

5–8 mm.

with 1 floret;

florets terete or weakly laterally compressed;

disarticulation above the glumes.

subequal to lemmas, 1-veined, glabrous, acuminate to short-awned;

lower glumes 4–8 mm;

upper glumes 6–11 mm.

2, often longer than the florets; thin; acute to acuminate;

glume awns; if present, arising between 2 slender inconspicuous hyaline teeth.

fusiform.

0.5–0.8 mm; hairy.

hairy, often sharp.

6–9 mm, 3-veined; leathery;

midveins scabrous, glabrous elsewhere;

lemma awns 3; the central awn 7–15(20)mm; the lateral awns somewhat shorter, occasionally only 1–2 mm, flattened near the base; straight to somewhat curved.

3-veined, hardened; terete, enclosing the palea at maturity.

3, 0.3–0.7 mm.

1 or 3.

3, arising at the tip of the lemma, ascending, spreading, sometimes coiled or contorted, persistent or disarticulating at maturity, subequal or sometimes the 2 lateral awns reduced to short teeth.

=22, 33, 44.