OregonFlora species comparison

terete, 2–40 cm × 0.5–1.5(2) mm.

terete, 2–35 cm × 0.3–1 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, 2–8 × 2–4 mm; floral scales 25–100+, approximately 10 per mm of rachilla, 1.5–2 × 1 mm; midribs often keeled in distal part of spike;

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 present, rarely absent; (5)6–7, exceeding tubercle;

stamens 2(3);

anthers 0.3 mm;

stigmas 2 or some 3.

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

biconvex or to 33% greatly compressed trigonous, 0.75–1 × 0.6–0.85 mm.

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

persistent, apex of distal leaf sheath obtuse to acute; tooth to 0.2 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.

deltoid, 0.3–0.5 × 0.3–0.5 mm, 60% to as high as wide, 33–67% as high and 50–75% as wide as achene.

=10.