OregonFlora species comparison

terete, 2–40 cm × 0.5–1.5(2) mm.

often ascending or spreading, 4-angled or terete 1–7 cm × 0.2–0.3 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, 1.5–4 × 0.8–2 mm; floral scales 4–15, 8 per mm of rachilla, 1–1.5 × 0.5–0.7 mm;

midrib obscure to somewhat keeled;

apex narrowly acute to acuminate, slightly recurved.

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 absent;

anthers 0.3–0.5 mm;

stigmas 3.

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

with about 6–10 rather prominent angles and longitudinal ridges, broadly ovoid; less than 2 times longer than wide; (0.55)0.65–0.75 × 0.3–0.4 mm; fine horizontal ridges distinct, 20–30.

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

often splitting;

apex 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.

mostly appressed; pyramidal, often depressed, 0.1–0.2 × 0.1–0.25 mm.