OregonFlora species comparison

erect, glabrous.

sometimes rooting at the lower nodes, sometimes branched above the base.

mostly basal;

sheaths with scattered hairs to 9 mm;

blades 12–50(65) cm × 1–3 mm.

sheaths open with tufts of hairs at the tops;

hairs 0.3–8 mm;

ligules usually membranous and ciliate; the cilia sometimes longer than the membranous base, occasionally consisting of hairs only or of non-ciliate membranes;

blades flat, folded, or involute.

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.

terminal and sometimes axillary open to contracted panicles.

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

laterally compressed; (1)2–60 florets, cleistogamous spikelets occasionally present on the axillary or terminal panicles;

disarticulation below the fertile florets; the glumes sometimes deciduous; the paleas sometimes persistent; acropetal or irregular.

lanceolate; hyaline;

lower glumes 1.2–2.6 mm;

upper glumes 2–3 mm.

2, usually shorter than the adjacent lemmas, 1(3)-veined;

tips obtuse to acute; awnless.

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

brown, often translucent.

1.8–3 mm; ovate, membranous;

lateral veins conspicuous;

tips acute.

glabrous; (1)3(5)-veined, usually keeled;

tips obtuse to acute; awnless or mucronate.

1.8–3 mm; hyaline to membranous, obtuse.

2-keeled; the keels usually ciliate.

3, 0.6–1.2 mm; reddish brown.

2–3.

glabrous or sparsely pubescent.

=40, 60, 80.