The sources listed below have information
on invasive exotic plants and ways to
stop their spread.
More information on Olympic’s website:
Reporting Sightings within Olympic National Park:
If you can positively identify invasive exotic plants, report when and where you see the weeds to the nearest ranger station or visitor center.
Some of the invasive plant species information on this website came from “Management of Exotic Plants in Olympic National Park” by Richard W. Olson, Jr., Edward G. Schreiner, and Lance Parker.