This Dame’s Rocket [Hesperis matronalis] wild flower was spotted on the roadside of Cane Creek on 21 April 2013. Newcomb’s Wildflower Guide, pages 138-139, lists this flower as a member of the Mustard (Brassicaceae) family. It’s stated that “[It] escaped from gardens to fields and roadsides.” USDA Plants Link: https://plants.usda.gov/home/plantProfile?symbol=HEMA3
