Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to Oregon, also in eastern North America.
Habitat: Ditches, wet pastures, shores, and railroad right of ways.
Flowers: June-August
Origin: Introduced from Europe
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
[none provided]
PNW Herbaria: Specimen records of Juncus conglomeratus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Juncus conglomeratus checklist entry
OregonFlora: Juncus conglomeratus information
E-Flora BC: Juncus conglomeratus atlas page
CalPhotos: Juncus conglomeratus photos