OregonFlora species comparison

terete, 2–40 cm × 0.5–1.5(2) mm.

terete, 8–80 cm × 0.3–1.4 mm.

lanceoloid to subcylindric, 5–10(20) × 2–3(4) mm;

proximal scale empty, encircling approximately 67% of culm; floral scales 25–100(200), 8–12 per mm of rachilla, 2(2.5) × 1–1.3 mm;

apex narrowly rounded to subacute.

ovoid to lanceoloid or nearly cylindric, 3–18 × 2–3(4) mm;

proximal scale clasping all or nearly all of culm, subproximal scale with flower; floral scales 15–50, 4–5 per mm of rachilla, 2–3.5 × 1.5–1.7 mm; in proximal part of spike apex rounded; in distal part apex entire; acute.

perianth bristles present or often absent; (0)5–8; about as long as the achenes;

anthers 0.3–0.7(1) mm;

stigmas 2–3.

perianth bristles 4 or absent, usually equal, equaling achene to slightly exceeding tubercle;

anthers 1–1.8 mm;

stigmas 2.

biconvex or to 33% greatly compressed trigonous, 0.9–1.1(1.5) × 0.7– 1.1 mm.

biconvex, 0.9–1.6 × 0.7–1.2 mm

persistent, apex of distal leaf sheath obtuse to acute, with tooth to 0.3 mm.

persistent;

apex broadly obtuse to subacute; tooth sometimes present; to 0.1 mm.

depressed, subdeltoid, 0.1–0.3(0.4) × 0.6–0.9(1) mm, 10–40% as high as wide, 25% or less as high as achene, 90% as wide as achene.

pyramidal; much higher than wide to lower than wide, 0.35–0.65 × 0.2–0.6 mm.

=16, 18, 19, 20.