The scent of tansy blows this way,
The aromatic tansy which
The housewives of an elder day
Planted in dooryard coign or niche.
—Donald Lines Jacobus “A Medley of Summer” (1914)
Certain plants our ancestors ate eagerly are now best left alone. Common tansy (Tanacetum vulgare) is one such plant. I often see this winsome member of the aster family growing along roads and in vacant lots. It greenish burgundy stalk stands some three or four feet tall and is adorned with clusters of canary yellow petal-less flowers. When crushed, its finely divided compound leaves smell of camphor and rosemary. It’s a lovely plant in its way — enough, anyway, to tempt me to take some of it home. But then I remind myself of its checkered past.