Originally described from Monte Alben, a second site has been found at Stabina valley, Valtorta, Bergamo. This species grows on calcareous rocks. It is strongly aromatic, and shortly pubescent with 3-celled hairs. Flowers are pale violet to lilac-blue with a white mealy eye. Similar to P. recubariensis, though larger and farinous. Hybrids with P. auricula are known but not formally described.