OregonFlora species comparison

blades 1–3 mm wide, inconspicuously papillose ventrally.

1.5–3.7(4.9) mm wide.

0.5–3 cm × 4–8 mm;

spikes 5–10; short, crowded, androgynous.

dense to slightly elongated;

heads 1.2–2.2 cm × (6)9–20 mm;

spikes gynaecandrous.

oval, 3.3–4 × 1.8–2.3 mm, light brown; shiny, broadly rounded on the dorsal side so that the 2 marginal ribs appear to be on the flat ventral surface, with several (7–15) more or less obscure dorsal veins and no ventral veins;

base more or less spongy, 0.7–1 mm long, drying wrinkled;

tip abruptly contracted to the beak;

beak 0.5–1 mm long; smooth-margined or serrulate;

stigmas 2.

typically elliptic to lance-ovate, sometimes lanceolate and nearly wingless, usually plano-convex; (2.9)3.6–5.4 × 1–2.1 mm; reddish brown or dark brown, lacking metallic sheen, with 3+ conspicuous veins that reach or exceed the top of the achene on each face of the perigynium;

wing usually 0.2–0.3 mm wide and sometimes curved toward the ventral surface, making the perigynium boat-shaped;

beak tips coppery or reddish brown, usually unwinged, brown; and parallel-sided for the distal 0.5–0.8 mm; (1.6)2–2.3 mm from top of achene to tip of beak;

stigmas 2.

lenticular.

lenticular, 1.2–1.8 × 0.7–1.1 mm; (0.3)0.4–0.5 mm thick.

slightly shorter than or as long as the perigynia; whitish or pale brown hyaline with green center;

apex acute or short-awned.

2.4–3.9 mm long; shorter than and as wide as or narrower than the perigynia; reddish brown with lighter or green mid-stripe.