OregonFlora species comparison

subterete, 10–30 cm × 0.3–0.5 mm.

often ascending or spreading, 4-angled or terete 1–7 cm × 0.2–0.3 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.

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

anthers 0.9–1.4 mm;

stigmas 3.

perianth bristles absent;

anthers 0.3–0.5 mm;

stigmas 3.

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

apex obtuse, rarely hardened, lacking a tooth.

often splitting;

apex acute.

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

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