Hesperis matronalis
(Dame's Rocket)
Brassicaceae (Mustard)
Noxious Weed!

Dame's Rocket is an escaped ornamental that has become a noxious weed. Purple flowers with four petals are on stems that can grow to three feet tall. Dame's Rocket is invading many canyons of the foothills. While the flowers may appear attractive, this noxious weed displaces native wildflowers and should be controlled or eradicated.
Vegetation zone:  Foothills, Montane
Time of bloom:  April - June
Origin:  Introduced (Noxious Weed)
Eastern Colorado Wildflowers