Page authors: David Giblin, Don Knoke
Juncus drummondii
Drummond's rush, threeflower rush

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.

Habitat: Alpine to subalpine meadows, streambanks, talus slopes and ridges.

Flowers: June-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Wind


Densely tufted perennials, forming small mats, the numerous flowering stems terete, 15-35 cm. tall.


Leaves bladeless or with bristle-like blades 2-5 mm. long; leaf bases sheathing, the sheaths 2-6 cm. long.


Flowers 1-3, closely spaced but discrete, each subtended by two brownish, membranous bracts, the involucral bract 1-2 cm. long, mostly terete, erect, sharp-pointed; perianth 5-7 mm. long, the 6 segments subequal, lanceolate, pointed, green with broad, membranous, brown margins; stamens 6.


Capsule slightly exceeding the perianth, blunt, with a very shallow notch on each valve.

Accepted Name:
Juncus drummondii E. Mey.
Publication: Flora Rossica. 4: 235. 1853.

Synonyms & Misapplications:
Juncus compressus Jacq. var. subtriflorus E. Mey.
Juncus drummondii E. Mey. var. drummondii [HC]
Juncus drummondii E. Mey. var. longifructus H. St. John
Juncus drummondii E. Mey. var. subtriflorus (E. Mey.) C.L. Hitchc. [HC]
Juncus pauperculus Schwarz
Juncus subtriflorus (E. Mey.) Coville
Additional Resources:

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

WA Flora Checklist: Juncus drummondii checklist entry

OregonFlora: Juncus drummondii information

E-Flora BC: Juncus drummondii atlas page

CalPhotos: Juncus drummondii photos

11 photographs:
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