Achillea erba-rotta

An endemic species of the Alps, it is divided into a complex series of forms based on leaf morphology. The erba-rotta subspecies is typical of the south-western Alps, whilst the moschata subspecies is widespread from Savoy throughout the eastern Alps. Both subspecies comprise several varieties. The Aosta Valley forms the transition zone between the two subspecies, and the erba-rotta subspecies is widespread within the National Park. 

It is a perennial aromatic plant, 10–20 cm tall, with leaves arranged in a rosette and more or less divided. The leaves have incised margins, hence the specific name erba-rotta. The inflorescence consists of small flower heads bearing white flowers. It grows mainly on stony pastures and scree at altitudes between 2,000 and 2,800 metres. 

With its marked medicinal properties, its flowering tops are used in the liqueur industry for the preparation of vermouth and digestive liqueurs. In folk medicine, a cup of the infusion is said to have soothing and expectorant properties and to promote sleep. However, please note that the picking of any plants is not permitted in the Park.