Proceedings of the California Academy of Sciences 2: 179. 1863 (as leseurii).
Herbs, perennial, 3–14 dm. Rhizomes long- creeping. Culms erect, 1–3 mm diam. Cataphylls several. Leaves: blade absent. Inflorescences lateral, 3–many-flowered, mostly loose; primary bract much longer than inflorescence. Flowers variously pedicellate; bracteoles membranous; tepals green, lanceolate, 5–8 mm, margins brown; inner series loosely subtending capsule at maturity, usually slightly shorter, margins scarious to clear, acutish; stamens 6, filaments 0.2–1.1 mm, anthers 0.9–2.3 mm; style 1–1.5 mm. Capsules 3-locular, oblate to narrowly ovoid, 4–7 mm, shorter than or nearly equal to perianth. Seeds dark amber, oblate to ellipsoid, 0.4–0.7 mm.
Phenology: Flowering and fruiting summer.
Habitat: Borders of salt or freshwater marshes and usually near dunes along the coast
Elevation: 0–500 m
B.C., Calif., Oreg., Wash.