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William H. Darr College of Agriculture

Midwest Weeds and Wildflowers (updated September 7, 2023) 

As I photograph weeds for this website, I have also begun photographing a number of wildflowers, and include them  now on this website.  Also, some "weeds," such as milkweeds, are being viewed more as wildflowers, due to their benefits to wildlife (milkweeds being the food of choice for monarch butterfly larvae, etc.)

Turfgrass Weeds:

Crop and Garden Weeds:

Pasture, Range and Roadside Weeds:

Aquatic and Wetland Weeds/Plants:

  • Click below to see a list of aquatic and wetland weeds and plants featured on this site that are frequently found in wetlands, streambanks and aquatic areas

List of Wildflowers:

List of All Weeds and Wildflowers  in Alphabetical Order:

Use of Photos

All photos on the Midwest Weed site are the property of Pamela B. Trewatha (unless otherwise noted).  Images I have photographed can be used for single  use, with permission, without cost for educational, web and commercial purposes.  Most photos are available at larger size and higher resolution than shown on the site.  Please contact me if you wish to obtain the higher resolution file.  I also like to hear about where the photos are used, so I can list them in my photo credits.  Thank you for your interest and assistance.

Photo credit:      Pamela B. Trewatha, Missouri State University


Phone:  417-883-8397                          

If a photo is by someone else, I can provide contact information for that person, if you wish to ask them to use it.

Need Help with Weed Identification?

Send digital photos of your unknown weeds to see if we can assist you in their identification.



Weed Survey

Spring/Summer 2023

Are wild ornamental pears growing in your area?


Ornamental Pear webpage

Seedlings of ornamental pears (like Bradford, Aristocrat, etc.) have escaped cultivation in parts of the central U.S., and are rapidly becoming abundant and invasive to open woods, pastures and prairies in many areas.  If you are seeing this where you live,  please let me know approximately how many--

     * less than 10 trees

     * 10-50 trees

     *  over 50 trees

and in what habitat and county/state you have seen them.

Please e-mail me at

Thank you very much!!