Achillea ptarmica (sneezewort, sneezeweed, bastard pellitory, European pellitory, fair-maid-of-France, goose tongue, sneezewort yarrow, wild pellitory, white tansy) is a species of herbaceous perennial flowering plant in the genus Achillea. It has loose clusters of white, button-like flowers that bloom from June to August. Its dark green leaves have finely toothed margins.
The name ptarmica comes from the Greek word ptairo (=sneeze) and means 'causes sneezing'. The name "yarrow" applies specifically to varieties of A. millefolium, but is often confusingly used for other species within the genus - including A. ptarmica.
Like many other plants, the sneezewort's pattern of development displays the Fibonacci sequence.
Read more about Achillea Ptarmica: Uses