Tansy is a diverse genus, ranging from alpines to woody-based perennials. Feverfew, Pyrethrum and Painted Daisy are all common names used to refer to some members. All produce daisy flowers in a range of colours and have aromatic foliage. The foliage can cause irritation and allergic reactions in some people.
There are about 150 species, mostly originating in Europe and Asia, with a few from North America and North Africa. They can be found growing on cliffs, alpine slopes, in grassy meadows and beside streams. There are a few annual species but the majority are short-lived perennials.
Most require a light soil in full sun, but some varieties appreciate a better soil and part shade.