OregonFlora species comparison

terete, 2–40 cm × 0.5–1.5(2) mm.

subterete to slightly compressed; to 2 times wider than thick, 5–15 cm × 0.2–0.5(1.2) mm; culm tufts often proximally bulbous (if bulbous then tunicated by papery-fibrous scales).

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.

with proximal internodes shorter and thicker than those in the middle of the spike, 3–8 × 1.5– 4 mm;

proximal scale subtending a flower; seldom empty, 2–5 mm, 50% or more as long as spike; floral scales 3–10 per spike, 2.5–6 × 1.5–2.5 mm.

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 (0)3–6, often unequal; rudimentary to equaling tubercle;

anthers 1.5–2.7(3.5) mm;

stigmas 3.

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

equilaterally trigonous to compressed-trigonous, rarely some biconvex, 1.6–2.3 × 0.7–1.3 mm.

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

apex often reddish, subtruncate to acute.

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.

rarely absent, 0.3–0.4 × 0.2–0.3 mm.