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Phragmites australis ssp. australis
Woody, hollow stems with showy plume-like terminal flowering stalks that are green to reddish.
|Soil and Moisture Conditions
|lower Columbia River islands, tidals flats and Willamette River
|Manually remove small patches by digging, being sure to remove every rhizome fragment
|Reproduction and Spread
|Root fragments disperse downstream. Seed dispersal by wind, water, and wildlife.
|Native to Africa and temperate areas of Asia and Europe.
|Native Phragmites australis ssp. americanus
|Aggressive invasive that excludes large wading birds and reduces feeding grounds for birds, reduces habitat for important fish species; can block fish passage; steepens creek banks; can alter soil invertebrate communities; decreases waterfront property values.