Tansy Ragwort
(Senecio jacobea L.)

 

Photo from Weeds of the West, revised edition

Toxic	Rosetta	Stem
Leaf	Bloom	Seed

Toxic: Toxic. All livestock, most especially cattle and horses.

Growth Habit: Biennial or short-lived perennial, 1 to 6 feet tall, solitary or several.

Leaves: leaves are 2 to 8 inches long, alternate and equally distributed, mostly 2 to 3 times pinnately lobed, the terminal lobe generally larger than the lateral ones.

Stem: 1 to 6 feet tall, solitary or several.

Flower: Flowering heads are numerous, both ray and disk flowers are yellow; ray flowers are 10 to 13 in number and ¼ to ½ inch long.

Roots: Taproot

Seeds: minutely pubescent

Reproduction: By Seed

Habitat: Range and Pasturelands

Biological Control: Cinnabar Moth, Ragwort Seed Fly, Tansy Ragwort Flea Beetle

Herbicide: 2,4-D, or 2,4-D + dicamba, or 2,4-D + trichlopyr

Caution: Tansy Ragwort is toxic to cattle, horses, sheep, humans and pets.

Video Supplied By Montana Weed Control Association