OregonFlora species comparison

wiry, strongly compressed;

nodes strongly compressed; some proximal nodes usually exserted.

intra- and extravaginal or mainly intravaginal.

intra- and extravaginal or mostly extravaginal.

sheaths closed to 25% of their length;

ligules 1–3 mm;

blades flat or folded, or slightly inrolled, 0.5–2 mm wide.

sheaths closed to 20% of their length;

ligules 1–3 mm;

blades flat, 1.5–4 mm wide;

cauline blades subequal.

erect, contracted, 1–3 cm long, usually exserted from the sheaths;

branches erect to steeply ascending; slender; to 1.5 cm.

erect, lanceoloid to ovoid, often interrupted; sparse to congested, 2–10 cm;

spikelets 15–80;

branches erect to ascending, or infrequently spreading, 0.5–3 cm, 1–3 per node, with 1–15 spikelets.

3–4 mm, green or purple;

florets 2–3;

rachilla internodes less than 1 mm long; smooth.

(2.3)3.5–7 mm;

florets (2)3–7(8).

lanceolate to broadly lanceolate, 2.4– 3.6(4) mm, usually equaling or exceeding the lowest lemma, frequently exceeding the upper florets;

lower glumes 3-veined.

lower glumes 3-veined.

glabrous.

with cobwebby hairs; less often glabrous.

lanceolate, 2.5–3 mm long, distinctly keeled; thin, glabrous;

keels and marginal veins rarely sparsely puberulent;

tips acute.

lanceolate, 2.3–3.5 mm, distinctly keeled;

keels and marginal veins short-villous; area between veins glabrous;

tips acute.

0.2–0.8 mm.

1.3–1.8 mm.

=14.

=42.