Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana and Wyoming, scattered further eastward to the Atlantic Coast.
Habitat: Shores, springs, swales, marshes, and ditches.
Flowers: July-September
Origin: Native
Conservation Status: Not of concern
Pollination: Wind
[none provided]
PNW Herbaria: Specimen records of Phragmites australis ssp. americanus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Phragmites australis ssp. americanus checklist entry
OregonFlora: Phragmites australis ssp. americanus information
E-Flora BC: Phragmites australis ssp. americanus atlas page
CalPhotos: Phragmites australis ssp. americanus photos