Distribution: Occurring west of the Cascades crest in Washington; southern British Columbia to coastal California.
Habitat: Marshes and river bottoms from tidelands to the lower mountains.
Flowers: May-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
Perennial, the stems 4-8 dm. tall, closely spaced on stout rhizomes.
Leaves alternate, 2-4 per stem, the upper ones with long, terete blades with prominent partitions; leaf bases sheathing, with rounded auricles 2-4 mm. long.
Heads 3-9, many-flowered, 8-12 mm. broad, assembled into 1-3 clusters 1-2 cm. broad; perianth tawny to deep brown, the 6 segments subequal, narrowly lanceolate and sharp-pointed; stamens 3.
Capsule about equal the perianth, cylindric, narrowed to a short beak.
Publication: 2:436, 470. 1868.
PNW Herbaria: Specimen records of Juncus bolanderi in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Juncus bolanderi checklist entry.
OregonFlora: Juncus bolanderi information.
E-Flora BC: Juncus bolanderi atlas page.
CalPhotos: Juncus bolanderi photos.
USDA Plants: Juncus bolanderi information.
