Tanacetum vulgare

Common Names: Tansy, bitter buttons, cow bitter, golden buttons
Category: Plants
Sub-category: Aster family

Tansy has a long history of use. It was first recorded as being cultivated by the ancient Greeks for medicinal purposes. In the 8th century AD it was grown in the herb gardens of Charlemagne and by Benedictine monks of the Swiss monastery of Saint Gall. Tansy was used to treat intestinal worms, rheumatism, digestive problems, fevers, sores, and measles.

Tansy is a flowering herbaceous plant with finely divided compound leaves and yellow, button-like flowers. It has a stout, somewhat reddish, erect stem, usually smooth, 50 to 150 cm tall, and branching near the top. The leaves are alternate, 10 to 15 cm long and are pinnately lobed, divided almost to the center into about seven pairs of segments, or lobes, which are again divided into smaller lobes having saw-toothed edges, giving the leaf a somewhat fernlike appearance. The roundish, flat-topped, button-like, yellow flower heads are produced in terminal clusters. The scent is similar to that of camphor with hints of rosemary.

Blooms from mid-to-late summer.

Edible Notes: Poisonous.
Warnings: The leaves and flowers are toxic if consumed in large quantities; the volatile oil contains toxic compounds including thujone, which can cause convulsions and liver and brain damage. Can cause contact dermatitis in sensitive individuals.
Additional Information: https://en.wikipedia.org/wiki/Tansy
Sightings