Species: Dames rocket
(Hesperis matronalis) 
Growth Form: Biennial or short-lived perennial.
Key Identifying Characteristics: Purple (sometimes white) flowers on 3-foot long stems, and sweet fragrance.
Reproduction: seed
Seed Longevity: 1- several years
Native To: Eurasia
Effective Control Methods: Maintain a healthy cover of native perennials. Locate and remove plants mechanically or with herbicide before seed set.