Dame's Rocket / Hesperis matronalis

This is a non-native wildflower, which we don't see all that often. Photographed this one while on a botanizing trip to the property belonging to a friend of a friend (Susan W.), on October 14th. It feels like a year ago - can't believe it was just October that we were out there!

en.wikipedia.org/wiki/Hesperis_matronalis