Coast is defined as the geographic area encompassing
the counties around the mouth of the Columbia River.
These include Pacific and Wahkiakum Counties, and west
Lewis County in Washington, and Clatsop County, north
Tillamook County, and west Columbia County in Oregon.
This region is homogenous for climate, geology, soils
of indigenous species grow at their northern or southern
distribution limits on the Columbia Coast. The Columbia
River, via international shipping, receives several
new species each year, including plants, fish, invertebrates
and plankton. The ocean beaches are national and international
tourist destinations. New species come in from many
other areas of the country and around the world. This
can make identification of new plant species challenging
of this list are updated each year, and additions of
confirmed species are welcome. Please contact Kathleen
Sayce at ksayce at willapabay dot org with your comments,
corrections and additions.