OregonFlora species comparison

subterete, 10–30 cm × 0.3–0.5 mm.

terete or cross section elliptic (or rectangular), 10–50 cm × 0.2–0.7(1) mm.

ovoid, 3–8 × 2–3 mm;

proximal scale clasping; entire, subproximal scale with flower; floral scales 8–30, 4–5 per mm of rachilla, 2–3 × 1.5 mm;

apex entire; acute, often keeled in distal part of spike.

narrowly lanceoloid, 3–20 × 1.5–2.5 mm;

proximal scale amplexicaul; entire, subproximal scale empty or with flower; floral scales 15–40, 3–4 per mm of rachilla, 2–3 × 1 mm;

apex entire, rounded to obtuse in proximal part of spike; acute in distal part, keeled; at least in distal part of spike.

perianth bristles 3–6, often unequal; from rudimentary to 50% of achene length;

anthers 0.9–1.4 mm;

stigmas 3.

perianth bristles (0)3–7, often unequal; rudimentary to slightly exceeding tubercle;

anthers 1.1–2 mm;

stigmas 3.

slightly to greatly compressed-trigonous, rarely thickly lenticular, 0.9–1.2 × 0.65–0.8 mm.

compressed-trigonous, 0.8–1.4 × 0.5–0.7 mm.

persistent, not splitting;

apex obtuse, rarely hardened, lacking a tooth.

persistent, not splitting;

apex with tooth often present on most or all culms; to 1 mm.

flat to shallowly pyramidal; lower than wide, 0.1–0.3 × 0.4–0.65 mm.

pyramidal, often higher than wide, 0.3–0.4 × 0.25–0.35 mm.

=10.