Carex lenticularis var. limnophila
in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 1: 279. 1969.
Culms 17–78 cm. Leaf-blades 2–4 mm wide. Inflorescences: peduncle of proximal spike 1 cm or longer; proximal bract 3–4 mm wide. Spikes: proximal 3–7 spikes pistillate, 1.5–3.6 cm × 4–6 mm; terminal spike staminate. Pistillate scales redbrown or black. Perigynia 5–7-veined on each face, ovoid, 2.5–3.5 × 1.3–1.6 mm; stipe 0.4–0.7 mm; beak redbrown, 0.2–0.5 mm.
Phenology: Fruiting Aug.
Habitat: Lakeshores, wet meadows
Elevation: 0–100 m
B.C., Alaska, Calif., Oreg., Wash.
Carex lenticularis var. limnophila occurs only along the Pacific coast and is distinguished from the sympatric var. lipocarpa by larger perigynia, wider pistillate spikes, more compact inflorescence, and pistillate scales that are as long as the perigynia.
"prolonged" is not a number.