OregonFlora species comparison

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

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.

terminal and sometimes axillary open to contracted panicles.

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.

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

tips obtuse to acute; awnless.

brown, often translucent.

glabrous or sparsely pubescent.

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

tips obtuse to acute; awnless or mucronate.

2-keeled; the keels usually ciliate.

2–3.