OregonFlora species comparison

subterete, 10–30 cm × 0.3–0.5 mm.

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

ovoid, 3–8 × 2–3 mm;

proximal scale clasping; entire, subproximal scale with flower; floral scales 8–30, 4–5 per mm of rachilla, 2–3 × 1.5 mm;

apex entire; acute, often keeled in distal part of spike.

(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 3–6, often unequal; from rudimentary to 50% of achene length;

anthers 0.9–1.4 mm;

stigmas 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.

slightly to greatly compressed-trigonous, rarely thickly lenticular, 0.9–1.2 × 0.65–0.8 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, not splitting;

apex obtuse, rarely hardened, lacking a tooth.

persistent;

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

flat to shallowly pyramidal; lower than wide, 0.1–0.3 × 0.4–0.65 mm.

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