Tansy Ragwort


Tansy Ragwort (Senecio jacobaea) Sunflower family

Short-lived perennial with one to several stems arising from a taproot. The plant grows 1 to 4 feet tall. Leaves deeply cut. Basal leaves stalked 2 to 8 inches long.Leaves become smaller and petioles become shorter moving up the stem. Flower heads borne in terminal clusters, heads consist of yellow ray and orange disc florets. Ray florets or �petals�number 10 to 13.

Contains a toxic compound responsible for considerable livestock mortality. It is estimated that the state of Oregon has lost $7 million per year to livestock poisoning by this plant.

Not known to occur in the Kenai Peninsula. Found in waste places, roadsides, clear-cuts, and meadows.

More information


Homer Soil and Water Conservation District National Park Service UAF Cooperative Extension Service Kenai Watershed Forum U.S. Fish and Wildlife Service U.S. Forest Service