OregonFlora species comparison

terete, 2–40 cm × 0.5–1.5(2) mm.

terete, 2–9 cm × 0.2–0.5 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.

2–4 × 1–2 mm;

proximal scale 50% or more of spike length; floral scales 6–10 per spike, 1.4–2.7 mm;

apex rounded to subacute.

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 6, usually equaling achene to slightly exceeding tubercle, sometimes unequal and some 50% of achene; very rarely rudimentary;

anthers 0.7–1.2 mm;

stigmas (2)3.

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

thickly trigonous, 0.9–1.2 × 0.55–0.75 mm.

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

often disintegrating, thinly membranous;

apex rounded.

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.

0.1–0.2 × 0.15 mm.