Tansy Ragwort (Senecio jacobaea) and St. Johnswort (Hypericum perfolatium) Oregon Department of Agriculture Rating Tansy ragwort is on the B and T lists while St. Johnswort is on the B list. Introduction Native to Europe and western Asia, these biennial or short-lived perennial (Tansy ragwort) to longer-lived perennial (St. Johnswort) weeds reproduce by seed and
Providing Local Solutions to Local Problems
Your Conservation District is here to help conserve, protect, and enhance the natural resources in the Tualatin River Watershed in many ways. Our goal is a clean and healthy watershed that supports all beneficial uses for people, fish, and wildlife; a vibrant economy; and livable communities.