Distribution: Occurring in scattered locations across Washington; Washington to Utah and Alberta, east across much of North America.
Habitat: Sandy lakeshores and riverbanks.
Flowers: July-September
Origin: Native east Cascades, introduced in Seattle, WA
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Cyperus schweinitzii in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Cyperus schweinitzii checklist entry.
E-Flora BC: Cyperus schweinitzii atlas page.
CalPhotos: Cyperus schweinitzii photos.
USDA Plants: Cyperus schweinitzii information.