Weeds ID Lists by Region in North America
|Looking for lists and images to identify weeds in
your state or province? Every state and province in North
America has a unique assortment of weeds that are either noxious or a
nuisance depending on how certain weeds affect the indigenous flora and
agriculture. A given weed identified as noxious in one state may not
pose a threat in another state, even if it may be established in both
areas. In the last few years, to the convenience of home gardeners and
professionals alike, many weed ID lists have found a new home on the
Web! Ergonica has also collected numerous Free Weed
Identification and Control-Management Guides as documents (mostly
PDF) that you can download from the
Ergonica Shopping Catalog.
Over 200 weed ID lists and databases are listed and described on these linked pages and files, including information about images, costs (if any), list criteria, number of species, and authors. They are sorted by multi-state regions followed by individual states or provinces in alphabetical order. Most states have passed legislation to identify noxious weeds and other types of weeds that should be managed carefully. Legislation often forbids the movement of noxious weed seed into the state. Some weeds are classified with restricted movement in counties where the county has administrative authority. See list of photos by weed species.
|Multi-State Regions||Alabama AL|
|Alaska AK||Alberta, Canada|
|Arizona AZ||Arkansas AR|
|British Columbia, Canada BC||California CA|
|Colorado CO||Connecticut CT|
|Delaware DE||Florida FL|
|Georgia GA||Hawaii HI|
|Idaho ID||Illinois IL|
|Indiana IN||Iowa IA|
|Kansas KS||Kentucky KY|
|Louisiana LA||Maine ME|
|Manitoba, Canada||Maryland MD|
|Massachusetts MA||Michigan MI|
|Minnesota MN||Mississippi MS|
|Missouri MO||Montana MT|
|Nebraska NE||Nevada NV|
|New Brunswick, Canada||New Hampshire NH|
|New Jersey NJ||New Mexico NM|
|New York NY||Newfoundland, Canada|
|North Carolina NC||North Dakota ND|
|Nova Scotia, Canada NS||Ohio OH|
|Oklahoma OK||Ontario, Canada ON|
|Oregon OR||Pennsylvania PA|
|Quebec, Canada PQ||Rhode Island RI|
|Saskatchewan, Canada SK||South Carolina SC|
|South Dakota SD||Tennessee TN|
|Texas TX||Utah UT|
|Vermont VT||Virginia VA|
|Washington WA||West Virginia WV|
|Wisconsin WI||Wyoming WY|
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Revised: April 5, 2015 .