William H. Darr College of Agriculture
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:
List of Wildflowers:
List of All Weeds and Wildflowers in Alphabetical Order:
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
Contact: pbtrewatha@missouristate.edu
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.
Send digital photos of your unknown weeds to see if we can assist you in their identification.
E-mail: pbtrewatha@missouristate.edu
Spring/Summer 2023
Are wild ornamental pears growing in your area?
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
pbtrewatha@missouristate.eduThank you very much!!