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![Asteraceae : Tanacetum vulgare](https://openprairie.sdstate.edu/nativeplant/1160/thumbnail.jpg)
Asteraceae : Tanacetum vulgare
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Family Name
Asteraceae
Common Name
Common tansy
Description
T
Tanacetum vulgare is a perennial herb with erect, usually smooth stems arising from a branched rhizome, singly or in clusters growing 50–150 cm tall and branching near the top. The plant is strongly scented and has numerous, alternate, twice pinnately divided, fern-like green leaves. The inflorescence consist of numerous (up to 200) heads in a corymbiform cyme. The heads are disk shaped, hemispheric at maturity, 5-10 mm in diameter and surrounded by an involucre of overlapping bracts. The outer yellow disc flowers are tubular and 3-toothed and the inner corollas are 5-toothed. The achenes are 5-sided with a short crown-like pappus. Tansy blooms in July and August in waste places stream banks and flood plains in the eastern and western edges of South Dakota.
![Asteraceae : Tanacetum vulgare](https://openprairie.sdstate.edu/nativeplant/1160/thumbnail.jpg)
Additional Notes
Tansy was introduced from Eurasia as an ornamental and medicinal plant. It is an invasive naturalized plant species and is considered a noxious weed in many states. Planting of this species is discouraged.