OregonFlora species comparison

nodes slightly compressed, 2–5 exserted; the uppermost node in upper 25–50% of culm.

nodes terete, 0–1 exserted.

intraor extravaginal or mostly extravaginal.

intra- and extravaginal or mostly intravaginal.

sheaths closed to 20% of their length, bases of basal sheaths glabrous;

ligules 0.2– 0.8(1)mm long, truncate;

blades mostly flat, 0.8–3 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.

narrowly lanceoloid to ovoid, generally 25–40% as broad as long at maturity; erect, or nodding in shade forms, sparsely to moderately congested, 7–16(20) cm long;

branches ascending to widely spreading, 2–5 per node, fairly straight.

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.

narrowly lanceolate to lanceolate; to 2.5–3.5 times as long as wide, 3–8 mm, usually not glaucous;

florets (1)2–5;

rachilla internodes mostly less than 1 mm.

to 3 times as long as wide, 6–12 mm;

florets 2–7;

rachilla internodes 0.8–1.5 mm long.

tapering from the base or narrowly lanceolate;

keels smooth or sparsely scabrous;

lower glumes 3-veined, 6.4–11 times as long as wide;

upper glumes shorter than or subequal to lowest lemma.

60–80% as long as adjacent lemmas;

lower glumes 3-veined.

with sparse, often short; cobwebby hairs.

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

hairs 1–2 mm.

narrowly lanceolate to lanceolate, 2.4–4 mm; lower lemmas less than 20% as wide as long, distinctly keeled;

keels and marginal veins short-villous, intermediate veins glabrous; area between veins smooth or muriculate, glabrous;

tips acute, usually bronzecolored in part.

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.

0.8–1.9 mm.

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

=28, 42.