Carex echinata subsp. phyllomanica
Contr. Univ. Mich. Herb. 14: 195. 1980.
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.
Phenology: Fruiting late spring–early summer.
Habitat: Coastal bogs, swamps, stream and lakeshores
Elevation: 0–200 m
B.C., Alaska, Calif., Oreg., Wash.