Marion County Weed List
(Click on thumbnails for larger photo)
Education & Control
These species are already present in the County,
sometimes in large patches. It is important to suppress
the growth of these species to prevent further habitat loss.
These species are not prevalent in the County,
but are believed to on the move. They should be
eradicated immediately to prevent further spread.
Giant, Japanese, and
Himalayan or Bohemian knotweeds
Polygonum sp. or Fallopia sp
Meadow & spotted knapweed
Yellow flag iris
Need to report a county-listed noxious weed? Reporting can be done easily by using the
Oregon Invasive Species Hotline. Give it a try!