An “invasive species “ is defined as a species that is:
1) non-native to the ecosystem under consideration and
2) whose introduction causes or is likely to cause economic or environmental harm or harm to human health. (Executive Order 13112) .
Disclaimer: Listed below are the species for which we have completed species profiles. This is not a list of all invasive plant species, nor does it have any regulatory implications. These profiles are an educational informational tool.
We would like to express our sincere appreciation to the following:
The authors of Weeds of the West, 9th Edition for the use of images posted at the Wyoming Weed Identification Site, a service of the University of Wyoming Cooperative Extension Service.
The authors of the Field Guide to Noxious and Other Selected Weeds of British Columbia for the use of images posted at the British Columbia Crop Pests and Diseases Site, a service of the British Columbia Ministry of Agriculture and Food.
The Washington State Noxious Weed Control Board for the use of images posted in their photo gallery.
Plant names on this website follow species described in Whitson et al. 2000. Scientific name synonyms can be found on the PLANTS National Database
Cranston, R., D. Ralph, and B. Wikeem.
Field Guide to Noxious and Other Selected Weeds of British Columbia. Ministry of Agriculture, Food and Fisheries. British Columbia.
Hultén, E. 1968.
Flora of Alaska and Neighboring Territories. Stanford University Press, Stanford.
Whitson, T.D. (Editor). 2000.
Weeds of the West, 9th Edition. Western Society of Weed Science in Cooperation with the Western United States Land Grant Universities Cooperative Extension Services. Newark, CA.