Loading please wait

Loading please wait
Sign In

​Terrible 10 - Tansy


Tansy ragwort

Tansy ragwort (Senecio jacobea)

  • Found in open pastures, roadside areas, ditches, clearcuts.
  • Biennial, first year growth is a ruffled, rosette, second year sends up one or more stalks 1-6 ft high. Leaves lobed and deeply cut, dark green above and lighter underside. Bright yellow flowers like small daisy with a yellow button and 13 small petals appear in late summer; common tansy is a close relative but flowers have no petals.
  • Native to Europe, first found here 1920’s, believed to be from contaminated hay.
  • Toxic to cattle and horses causing irreparable liver damage. Seeds can last 15 years so infestations require continual monitoring.

Island County

Copyright Island County. All Rights Reserved 2019

Site Disclaimer | Contact Us


Main Offices

Whidbey Office
1 NE 7th Street
Coupeville, WA 98239

Camano Office
121 N East Camano Dr
Camano Island, WA 98282

Helpful Numbers

Main Line: (360) 678-5111
Sheriff: (360) 679-7310

Juror Recordings
Superior Court: (800) 254-2755
District Court: (800) 946-9765

Island County Directory

Employee Portal