OregonFlora species comparison

nodes terete, 0–1 exserted.

intra- and extravaginal or mainly intravaginal.

intra- and extravaginal or mostly intravaginal.

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 33–88% of their length, bases of basal sheaths glabrous;

collars smooth, glabrous;

ligules 0.5–2(2.5) mm;

cauline blades flat or folded, 2–5 mm wide; smooth or upper surface sparsely scabrous, mainly over the veins;

blades gradually reduced up the culm; uppermost blade 0.7–6 cm.

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, tightly to loosely contracted, 2–9 cm;

spikelets 15–30;

proximal internodes less than 2 cm;

branches erect to ascending to slightly spreading, 1–2 per node, 0.9–3.2 cm, with 1–4 spikelets.

3–4 mm, green or purple;

florets 2–3;

rachilla internodes less than 1 mm long; smooth.

to 3 times as long as wide, 6–12 mm;

florets 2–7;

rachilla internodes 0.8–1.5 mm long.

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.

60–80% as long as adjacent lemmas;

lower glumes 3-veined.

glabrous.

of at least some lower florets with sparse cobwebby hairs, rarely all florets glabrous;

hairs 1–2 mm.

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

keels and marginal veins rarely sparsely puberulent;

tips acute.

lanceolate, 5–7 mm, distinctly keeled; smooth or sparsely finely scabrous, glabrous throughout or keels and marginal veins sparsely soft-puberulent over the proximal 20%; area between the veins glabrous, 5–7-veined;

tips acute.

0.2–0.8 mm.

vestigial and 0.1–0.2 mm, aborted late in development, or 1.8–3.7 mm.

=14.