Thanks to OCMGA Master Gardener Mary Learman for discovering this information.
Keep an eye on your garden and your lawn. As though we didn’t have enough weeds and invasives to watch, the University of Illinois Extension warns of Pellitory (Parietaria pensylvanica) appearing in the midwest. Funnily, the leaves remind one of peony plants or, perhaps, dianthus before it blooms. Don’t be fooled, however, as it’s aggressive enough to take on your whole garden and flexible enough to grow out of cracks.
For more information, follow this link to the article published by the University of Illinois Extension.