Looks like a Geranium sp. Probably one of the weedy ones. I believe you have G. carolinianum as a weed in Missouri. http://www.missouriplants.com/Pinkalt/Geranium_carolinianum_page.html
Response from "Silver surfer" is SO appreciated. Info will useful in pursuing some local sites for further confirmation of this "plant/weed" <smile>. Will endeavor to attach another digi-pic (closer view) for review. Appreciating, Ray C.