OregonFlora species comparison

decumbent and rooting at the lower nodes, often branched, glabrous or lower internodes hairy.

erect, glabrous.

sheaths with spreading hairs on the margins; collars; and tips;

hairs 0.1–0.6 mm;

blades 0.5–2.5 cm × 1–2 mm.

mostly basal;

sheaths with scattered hairs to 9 mm;

blades 12–50(65) cm × 1–3 mm.

terminal and axillary, 1–3.5 × 0.7–2.5 cm; ovate; open to congested;

primary branches 0.1–0.5 cm, appressed to strongly divergent, glabrous;

pedicels 0.2–1 mm, ciliate;

disarticulation acropetal.

16–35(40) × (4)8– 24 cm; ovate to oblong; open;

primary branches 3–14 cm, diverging 10–80° from the inflorescence axis;

pedicels 0.5–5 mm, appressed; flexible;

disarticulation irregular or acropetal;

basal rachilla internodes persistent.

4–13 × 1–1.5 mm, loosely overlapping; greenish yellow to purplish, 12–35 florets.

4–8.2(10) × 1.2–2 mm, gray to yellowish, with 3–10 florets.

linear-lanceolate to lanceolate; hyaline;

lower glumes 0.4–0.7 mm;

upper glumes 0.8–1.2 mm.

lanceolate; hyaline;

lower glumes 1.2–2.6 mm;

upper glumes 2–3 mm.

0.3–0.5 mm, ellipsoid.

1–1.7 mm, ellipsoid to obovoid, dorsally compressed, with or without a shallow; broad groove.

1.4–2 mm; ovate, strongly 3-veined;

veins greenish;

tips acuminate.

1.8–3 mm; ovate, membranous;

lateral veins conspicuous;

tips acute.

0.7–1.2 mm; hyaline, persistent;

keels minutely scabrous; acute to obtuse.

1.8–3 mm; hyaline to membranous, obtuse.

2, 0.2–0.3 mm; brownish.

3, 0.6–1.2 mm; reddish brown.

=20.

=40, 60, 80.