Page authors: Don Knoke, David Giblin
Juncus bolanderi
Bolander's rush

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.

Accepted Name:
Juncus bolanderi Engelm.
Publication: 2:436, 470. 1868.

Synonyms & Misapplications:
Juncus bolanderi Engelm. var. riparius Jeps.
Additional Resources:

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

19 photographs:
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