Tanacetum vulgare

Common Tansy
Tanacetum vulgare

Family: Sunflower (Asteraceae)
AKA: Bitter Buttons, Cow Bitter, Mugwort, Golden Buttons.
Photo taken on: September 4, 2005
Location: Lower Loop, Crested Butte, CO
Life Zones: Plains to montane
Habitat: Moist disturbed soil

Grows to 3ft tall in patches. It is a robust plant with dissected, aromatic leaves. Button-like flower heads form grow in a flat tight cluster.

Flora of North America reference.

NOXIOUS

Yellow Round Clusters