Distribution: Southwest British Columbia to Caslifornia; in Washington, in the lowlands west of the Cascades.
Habitat: Wet meadows and lake shores.
Flowers: May - August
Origin: Native
Conservation Status: Not of concern
Perennial from spreading rhizomes, often also stoloniferous, the stems 4-9 dm. tall.
Leaves alternate, the blades flat, 3-5 mm. broad, one margin turned toward the stem; leaf bases sheathing, not forming auricles.
Inflorescence terminal, large and loose, 15-30 cm. long, much longer than the involucral bract; heads 10-70, 3-12 flowered, 3-6 mm. broad; perianth 3-4 mm. long, the 6 segments greenish-yellow to pale brown, subequal, lanceolate-acuminate; stamens 6, the anthers slightly longer than the filaments; style slender, 1.5-2 mm. long.
Capsule ovoid, tapered to a beak-like tip which slightly exceeds the perianth.
Publication: Transactions of the Academy of Science of St. Louis 2:483. 1868.
PNW Herbaria: Specimen records of Juncus oxymeris in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Juncus oxymeris checklist entry.
E-Flora BC: Juncus oxymeris atlas page.
CalPhotos: Juncus oxymeris photos.
USDA Plants: Juncus oxymeris information.
