OregonFlora species comparison

subterete, 10–30 cm × 0.3–0.5 mm.

subterete to slightly compressed; to 2 times as wide as thick; (5)10–40 cm × 0.5–1.2 mm; culm tufts not proximally bulbous.

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.

with proximal internodes shorter and thicker than those in the middle of the spike, 5–10 × 2–4 mm;

proximal scale usually empty, 3–5 mm, usually 50% or more as long as spike; floral scales 8–12 per spike, 3.5–5 × 2–2.5 mm.

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

anthers 0.9–1.4 mm;

stigmas 3.

perianth bristles 6; equal; the longest equaling achene to exceeding tubercle;

anthers 1.6–3.5 mm;

stigmas 3.

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

equilaterally trigonous to compressed trigonous, rarely some biconvex, 1.8–2.2(2.7) × 0.7–1.3 mm;

apex tapered to a distinct beak 0.2–0.9 × 0.3–0.6 mm.

persistent, not splitting;

apex obtuse, rarely hardened, lacking a tooth.

apex brown to red.

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

0.4–0.5 × 0.3–0.5 mm.