Canadian summer bluet, Houstonia canadensis

Canadian late-spring bluet? Other species of bluets in this group do bloom later, so this gets to be a summer bluet despite its timing. These half-foot plants with quarter-inch flowers grow in woodlands in GA, IL, IN, KY, ME, MI, MN, MO, NC, ND, NY, OH, PA, SC, TN, VA, WV, ON, and SK. Chateau Nivale Preserve, Adams Co OH, 5/27/20. Madder family, Rubiaceae.