Common monkeyflower or seep monkeyflower (implying it grows where water seeps) is a native of western North America – if you accept a narrow definition of the species, i.e., sensu stricto. You would also then accept the existence of twenty or thirty closely related taxa. If, however, you view the species sensu lato (in the broad sense) like the USDA PLANTS database, the distribution changes to include northeastern North America and the 20-30 closely related taxa “disappear” by being lumped into the now monolithic Mimulus guttatus species complex.