Page authors: Don Knoke, David Giblin
Juncus tenuis
path rush, poverty rush, slender rush

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.

Habitat: Shores, seeps, damp ground, and ditches.

Flowers: June - September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind


Tufted perennial, the stems 1.5-6 dm. tall.


Leaves only on the basal portion of the stem; leaf blades flattened, 0.5-1.5 mm. broad; leaf bases sheathing, the sheaths projecting upward into auricles that are either gristle-like and short or membranous and elongate.


Flowers few to numerous in a terminal, congested to open, cymose inflorescence, exceeded by the involucral bract; perianth 4-5 mm. long, the 6 segments greenish to tawny with a green midrib, the margins membranous, the tip acute or awl-like; stamens 6, the anthers shorter than the filaments.


Capsule firm, cylindric-ovoid, truncate, about equal to the perianth.

Accepted Name:
Juncus tenuis Willd.
Publication: Sp. Pl. 2(1): 214. 1799.

Synonyms & Misapplications:
Juncus bicornis Michx.
Juncus macer Gray
Juncus tenuis Willd. var. bicornis (Michx.) E. Mey.
Juncus tenuis Willd. var. multicornus E. Mey.
Juncus tenuis Willd. var. tenuis [HC]
Juncus tenuis Willd. var. williamsii Fernald
Additional Resources:

PNW Herbaria: Specimen records of Juncus tenuis in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Juncus tenuis checklist entry

OregonFlora: Juncus tenuis information

E-Flora BC: Juncus tenuis atlas page

CalPhotos: Juncus tenuis photos

36 photographs:
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