Horticulture/Rorippa sylvestris

Rorippa sylvestris (Creeping Yellowcress, Keek, Yellow Fieldcress; syn. Radicula sylvestris (L.) Druce ) is an invasive species ) in the United States.

Description
Rosette-forming perennial with pinnatifid leaves and clusters of yellow flowers. Colonizes rapidly via underground rhizomes.

Ecology
Considered a noxious weed in parts of the United States.