This looks to be an introduced plant. It is growing in shade usually and is used as a ground cover. It has established it self and will remain here.
Evening hike at CRP I observed these flowering plants near escarpment trail's trail head on the left hand side of the trail near the barn
Vinca major, with the common names bigleaf periwinkle, large periwinkle, greater periwinkle and blue periwinkle, is species of flowering plant in the family Apocynaceae, native to the western Mediterranean. Growing to 25 cm (10 in) tall and spreading indefinitely, it is an evergreen perennial, frequently used in cultivation as groundcover.