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- Weed Identification
Weed Identification
The State of Idaho has 67 different species of weeds. 51 of these species are terrestrial. The state categorizes Noxious Weeds into 4 different categories: 1) Statewide Prohibited Genera 2) Early Detection Rapid Response 3) Control and 4) Containment. A full list of Idaho Invasive Species can be found here.
Below is the list of current 25 Noxious Weeds found in Blaine County, click the name to be taken to ISDA information sheets that contain more information and a variety of photos:
Black Henbane
Photo Credit: Jan Samanek, Phytosanitary Administration, Bugwood.org
Canada Thistle
Photo Credit: Jan Samanek, Phytosanitary Administration, Bugwood.org
Curlyleaf Pondweed
Photo Credit: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Dalmatian Toadflax
Photo Credit: K.George Beck and James Sebastian, Colorado State University, Bugwood.org
Diffuse Knapweed
Photo Credit: USDA Agricultural Research Service, USDA Agricultural Research Service, Bugwood.org
Dyer’s Woad
Photo Credit: Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Field Bindweed
Photo Credit: K.George Beck and James Sebastian, Colorado State University, Bugwood.org
Hoary Alyssum
Photo Credit: Catherine Herms, The Ohio State University, Bugwood.org
Houndstongue
Photo Credit: Mary Ellen (Mel) Harte, Bugwood.org
Johnsongrass
Photo Credit: James H. Miller, USDA Forest Service, Bugwood.org
Jointed Goatgrass

Photo Credit: USDA APHIS PPQ - Oxford, North Carolina, USDA APHIS PPQ, Bugwood.org
Leafy Spurge
Photo Credit: Chris Evans, University of Illinois, Bugwood.org
Mediterranean Sage
Photo Credit: Eric Coombs, Oregon Department of Agriculture, Bugwood.org
Oxeye Daisy
Photo Credit: Becca MacDonald, Sault College, Bugwood.org
Perennial Pepperweed
Photo Credit: Pedro Tenorio-Lezama, Bugwood.org
Perennial Sowthistle
Photo Credit: John Cardina, The Ohio State University, Bugwood.org
Poison Hemlock
Photo Credit: John Cardina, The Ohio State University, Bugwood.org
Puncturevine
Photo Credit: Steve Dewey, Utah State University, Bugwood.org
Rush Skeletonweed
Photo Credit: Steve Dewey, Utah State University, Bugwood.org
Russian Knapweed
Photo Credit: Steve Dewey, Utah State University, Bugwood.org
Scotch Thistle
Photo Credit: Bonnie Million, Bureau of Land Management, Bugwood.org
Spotted Knapweed
Photo Credit: Rob Routledge, Sault College, Bugwood.org
Vipers Bugloss
Photo Credit: Rob Routledge, Sault College, Bugwood.org
Hoary Cress
Photo Credit: Mark Schwarzlander, University of Idaho, Bugwood.org
Yellow Toadflax
Photo Credit: L.L. Berry, Bugwood.org