Common Tansy (Tanacetum vulgare)
Sunflower family

Plant Identification: Perennial, spreads by seed and by short rhizomes, forming dense clumps. Flat-topped cluster of button-like yellow flowers lacking petals. Numerous composite flower heads (20 to 200 per plant). Leaves alternate and deeply divided into narrow individual leaflets, giving a feathery appearance.Plants grow to five feet tall. Strong odor.

Threat: Mildly toxic to grazing animals. Used commonly in gardens where it tends to spread into other yards and natural areas. This plant can restrict the flow of water along streams.

Found: Common Tansy exists in less than a dozen locations in Juneau. Grows along roadsides, river and stream banks, and beach meadows. It is not too late to prevent the aggressive spread in Southeast Alaska.

Distribution Map: Common Tansy (Tanacetum vulgare) (External Link to EDDMapS website)

Detailed information sheet (Link to .pdf at UAA ENRI Alaska Natural Heritage Program)

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