Tansy Ragwort

( Senecio jacobaea, Jacobaea vulgaris )

QUICK IDENTIFICATION

  • Dark green leaves on top side with whitish-green on the under side; lower leaves have white, cobwebby hairs
  • Flowers grow in clusters on stout, leafy elongated stems
  • Numerous bright-yellow flowers; each flower has approximately 13 petals
  • Height 3 to 6 feet

Video Information

Weed Pictures

toxic
Dan-Williams-4-001
2012-07-21-083-1
2012-07-21-084
1196221-1
5274073

Weed Information

Type Information
Toxicity Toxic. All livestock, most especially cattle and horses.
Control Hand-pulling, biological and herbicide. Contact your County Weed District or local applicator for more information.
Habitat Grasslands, disturbed areas, forests, pastures, rangelands and clear-cuts
Root Taproot with some lateral roots
Leaf Shape Deeply lobed with ruffled edges
Lifespan Biennial; two years to complete life cycle.
Priority 2A Weed Common in isolated areas of Montana.
Similar Looking Plants St. Johnswort and groundsel
Important Information Tansy can re-grow if the roots are broken off or anytime the plant is cut. Covering the site with mulch will help prevent new germination. Leaves produce strong odor when crushed.
Join MWCA
Join
Today Join MWCA
Member
Login