Carex phyllomanica W. Boott in S. Watson, Bot. California 2: 233. 1880

Culms 20–80 cm. Leaves 1–3.3(–3.8) mm wide, widest leaf (1.7–)2.3–3.3(–3.8) mm wide. Inflorescences very dense, 1.2–2.5(–4) cm; distance between basal 2 spikes usually less than length of basal spike. Perigynia usually 2–12-veined adaxially over achene, (3.1–)3.5–4.75 mm, margins usually not serrulate.

Fruiting late spring–early summer. Coastal bogs, swamps, stream and lakeshores; 0–200 m; B.C.; Alaska, Calif., Oreg., Wash.