OregonFlora species comparison

0.5–0.9 mm thick;

nodes 0(1) exserted.

intravaginal.

sheaths terete, closed to 33% of their length, bases of basal sheaths glabrous, collar margins smooth or scabrous to hispidulous;

ligules (0.5)1–6 mm long, translucent;

tips truncate to acute, ligules of sterile shoots 1–2.5 mm long;

blades involute, frequently somewhat arcuate, 1.5–3 mm wide;

lower surfaces smooth;

upper surfaces densely scabrous or hispidulous;

cauline blades only slightly reduced higher on the culm.

erect, narrowly lanceoloid to ovoid, moderately congested, 1–6 cm;

spikelets 6–20(25);

branches erect, 0.5–1.5(2)cm, 1–2 per node, with 1–3 spikelets.

broadly lanceolate; to 3.5 times as long as wide, 6–8(12) mm; shiny;

florets 2–5;

rachilla internodes smooth.

lanceolate to broadly lanceolate, 3.5–7.5 mm, those of male plants shorter and with rounder tips than those of female plants; thin; shiny; almost transparent;

keels smooth or sparsely scabrous;

lower glumes slightly shorter than adjacent lemma, 3-veined.

glabrous.

lanceolate, 5–8 mm, thinly membranous, distinctly keeled; smooth or sparsely finely scabrous, glabrous;

tips acute.

vestigial and 0.1–0.2 mm on female plants, 2–4 mm on male plants.