OregonFlora species comparison

stout, 1.5–2 mm thick;

nodes terete, 0(1) exserted.

0.5–0.9 mm thick;

nodes 0(1) exserted.

mainly intravaginal; some extravaginal.

intravaginal.

sheaths closed about 50% of their length, bases of basal sheaths glabrous;

collars smooth, glabrous;

ligules 1–5 mm;

blades moderately to densely scabrous or minutely hairy on and between veins, blades of tillers to 30 cm;

cauline blades involute; somewhat arcuate, 2–4 mm wide; uppermost blades 1–10 cm.

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; ovoid to lanceolate, contracted, often interrupted, 3–15 cm;

spikelets 15–80;

branches 1-2; erect, 1–6 cm; stiff, with 3–17 spikelets.

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.

9–17 mm; to 3 times as long as wide;

florets 3–6(10).

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

florets 2–5;

rachilla internodes smooth.

broadly lanceolate, subequal to adjacent florets;

keels sparsely scabrous near tips;

lower glumes 3-veined;

upper glumes usually more than 7 mm, 3–5-veined.

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.

usually with a line of crisp to sinuous hairs around the base of the lemma, sometimes glabrous or with diffuse; short; cobwebby hairs.

glabrous.

lanceolate; (6)7.5–11 mm, 5–7(11)-veined, distinctly keeled;

keels and marginal veins, sometimes also intermediate veins; short-villous to softly puberulent; area between veins smooth to scabrous, glabrous or softly puberulent;

tips acute.

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

tips acute.

vestigial and 0.1–0.2 mm, or (2)3–4(5)mm.

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

=28.