OregonFlora species comparison

terete, 2–40 cm × 0.5–1.5(2) mm.

acutely quadrangular; (30)45–105 cm × (1)2–5.4 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.

(15)20–76 × 3–5(6) mm;

proximal scale empty; amplexicaul; (1)2.2–5.4 mm; floral scales (28)45–135, 2–3 per mm of rachilla; (4)4.5–6.2 × 2.8–5 mm;

apex rounded to obtuse.

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 6–7, often markedly unequal; shorter than achene or some equaling tubercle;

anthers 2.3–2.9 mm;

stigmas 3, sometimes 2.

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

biconvex, 1.8–3 × 1.3–2 mm; almost smooth to markedly sculptured at 10–15×; each face with 19–38 rows of almost linear, transversely elongated cells; which are sometimes isodiametric at achene base.

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

persistent;

apex narrowly acute to acuminate, sometimes prolonged into a blade-like portion to 8 cm.

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 to high-pyramidal or lanceoloid, 0.7–1.5 × 0.4–1 mm, often spongy.