OregonFlora species comparison

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 closed 50% or more of their length;

ligules 1.5–5(10)mm, blades of tillers flat, 1–7(10) mm wide, finely scabrous;

cauline blades 2–10 cm.

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, eventually open, 10–25(30)cm; the branches eventually spreading or reflexed.

9–17 mm; to 3 times as long as wide;

florets 3–6(10).

(2)4– 6 mm;

florets 2–5;

rachilla internodes about 1 mm; smooth, softly puberulent or occasionally glabrous.

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.

slightly unequal;

keels and sometimes lateral veins scabrous;

lower glumes 1–3-veined.

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

with sparse cobwebby hairs on at least some florets.

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 to narrowly lanceolate, 2.5– 3.5 mm, distinctly keeled, evenly crisply puberulent near the base, finely scabrous distally;

margins narrowly hyaline;

tips narrowly acute, rarely purple.

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

0.2–1 mm.

stout, 1.5–2 mm thick;

nodes terete, 0(1) exserted.

nodes terete.

=28.