Distribution: Occurring west of the Cascades crest in Washington along the coast; British Columbia to California.
Habitat: Coastal, damp sandy ground, dunes, and salt marsh margins.
Flowers: May-July
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
Rhizomatous perennial, 3-14 dm, rhizome long and creeping, stems erect and 1-3 mm in diameter, cataphylls several.
Leaves basal; sheaths dark brown, shiny, loose; blades absent.
Lateral cymes, 3-many-flowered; primary bract erect and appearing to be a continuation of the stem; bracteoles 2, membranous, at base of perianth.
Pedicellate; tepals green with brown margins, lanceolate, 5-8 mm, inner whorl loosely subtending capsule at maturity and typically slightly shorter with scarious to clear margins; stamens 6, filament 0.2-1.1 mm, anthers 0.9-2.3 mm; style 1-1.5mm.
Capsules 3-chambered, oblate to narrowly ovoid, 4-7 mm, shorter than or nearly equal to perianth; seeds dark reddish orange, oblate to ellipsoid, 0.4-0.7 mm.
PNW Herbaria: Specimen records of Juncus breweri in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Juncus breweri checklist entry
OregonFlora: Juncus breweri information
E-Flora BC: Juncus breweri atlas page
CalPhotos: Juncus breweri photos