Scarlet Lychnis or Maltese Cross[Lychnis chalcedonica] in the Mitchell, Ontario Demonstration Forest on on 19 June 2013. It’s a member of the Pini (Caryophyllaceae) family. Newcomb’s Wildflower Guide, pages 258-259, says that it blooms in summer and that it “escaped from gardens to roadsides and thickets.” USDA Plants Listing: https://plants.usda.gov/home/plantProfile?symbol=LYCH3
