Courthouse Logo
Department header image
Weed Board
222 North Havana, Room 112
Spokane, WA 99202
Contact Us
Skip Navigation Links
Print this page 
Email this page to a friend 

Your questions, comments, and suggestions about this page help us evaluate how well we are doing at providing clear and concise information.

The suggestion field is required. Please provide an email address or contact information if you would like a response.

Noxious Weed List

The Spokane County Noxious Weed Control Board adopts a Noxious Weed List each year.  The list categorizes weeds into four classes, Class A, Class B Designates, Class B and Class C, according to the seriousness of the threat they pose to the County.  In addition to these classes, Spokane County has established a Weeds of Concern list

Common Name

Scientific Name

Picture 1

Picture 2

Picture 3


More Information


Echium vulgare

Blueweed Pic 1 Blueweed Pic 2 Blueweed Pic 3

Broom, Scotch

More Information


Cytisus scoparius

Scotch Broom Pic 1 Scotch Broom Pic 2 Scotch Broom Pic 3


More Information


Solanum rostratum

Buffalobur Pic 1 Buffalobur Pic 2 Buffalobur Pic 3

Bugloss, Common

More Information


Anchusa officinalis

Common Bugloss Pic 1 Common Bugloss Pic 2 Common Bugloss Pic 3

Chervil, Wild

More Information


Anthriscus sylvestris

Wild Chervil Pic 1 Wild Chervil Pic 2 Wild Chervil Pic 3

Cress, Hoary

More Information


Cardaria draba

Hoary Cress Pic 1 Hoary Cress Pic 2 Hoary Cress Pic 3

Daisy, Oxeye

More Information


Leucanthemum vulgare

Oxeye Daisy Pic 1 Oxeye Daisy Pic 2 Oxeye Daisy Pic 3

Four O'Clock, Wild

 More Information


Mirabilis nyctaginea

Wild Four O'Clock Pic 1 Wild Four O'Clock Pic 2 Wild Four O'Clock Pic 3

Hawkweed, Orange

More Information


Hieracium aurantiacum

Orange Hawkweed Pic 1 Orange Hawkweed Pic 2 Orange Hawkweed Pic 3

Hawkweed, Yellow

More Information


Hieracium caespitosum

Yellow Hawkweed Pic 1 Yellow Hawkweed Pic 2 Yellow Hawkweed Pic 3

Helmet, Policeman's

More Information


Impatiens glandulifera

Policeman's Helmet Pic 1 Policeman's Helmet Pic 2 Policeman's Helmet Pic 3

Knapweed, Diffuse

More Information


Centaurea diffusa

Diffuse Knapweed Pic 1 Diffuse Knapweed Pic 2 Diffuse Knapweed Pic 3

Knapweed, Russian

More Information


Acroptilon repens

Russian Knapweed Pic 1 Russian Knapweed Pic 2 Russian Knapweed Pic 3

Knapweed, Spotted

More Information


Centaurea stoebe

Spotted Knapweed Pic 1 Spotted Knapweed Pic 2 Spotted Knapweed Pic 3


More Information


Kochia scoparia

Kochia Pic 1 Kochia Pic 2 Kochia Pic 3

Loosestrife, Purple

More Information


Lythrum salicaria

Purple Loosestrife Pic 1 Purple Loosestrife Pic 2 Purple Loosestrife Pic 3

Mustard, Garlic

More Information


Alliaria petiolata



More Information



Tribulus terrestris 

 Puncturevine Pic 1  Puncturevine Pic 2  Puncturevine Pic 3


More Information


Tamarix ramosissima

Saltcedar Pic 1 Saltcedar Pic 2 Saltcedar Pic 3

Skeletonweed, Rush

More Information


Chondrilla juncea

Rush Skeletonweed Pic 1 Rush Skeletonweed Pic 2 Rush Skeletonweed Pic 3

Spurge, Leafy

More Information


Euphorbia esula

Leafy Spurge Pic 1 Leafy Spurge Pic 2 Leafy Spurge Pic 3

Starthistle, Yellow

More Information


Centaurea solstitialis

Yellow Starthistle Pic 1 Yellow Starthistle Pic 2 Yellow Starthistle Pic 3

Thistle, Canada

More Information


Cirsium arvense

Canada Thistle Pic 1 Canada Thistle Pic 2 Canada Thistle Pic 3

Thistle, Musk

More Information


Cardurus mutans

Musk Thistle Pic 1 Musk Thistle Pic 2 Musk Thistle Pic 3

Thistle, Scotch

More Information


Onopordum acanthium

Scotch Thistle Pic 1 Scotch Thistle Pic 2 Scotch Thistle Pic 3

Toadflax, Dalmatian

More Information


Linaria dalmatica

Dalmatian Toadflax Pic 1 Dalmatian Toadflax Pic 2 Dalmatian Toadflax Pic 3