Etymology: Tanacetum: from the medieval Latin name tanazita, in turn derived from Greek athanasia, "immortality," of uncertain application to this taxa
Plants: erect, perennial, 1 1/2' - 5' tall, aromatic forb
Leaves: many, mostly hairless, 4"-8" long and half as wide, dotted, 4-10 parirs of feathery, pinnate divisions
Flowers: head 1/4" wide with only yellow disk flowers; inflorescence with 20-200 heads in a dense cluster; blooms Aug.-Oct.
Habitat: fields, roadsides, disturbed sites
Hazardous: Careful, this plant is hazardous!
Invasiveness: Restricted Invasive - Eradicate!
Conservation Status: Introduced - naturalized; ecologically invasive

Flora of North America: Flora of North America WIS DNR-Bureau of Endangered Resources: Detailed information on Wisconsin invasive species including decription, habitats, control methods USDA Plants Database: Federal Distribution and detailed information including photos Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key Southwest School of Botanical Medicine: Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada"