Common in all types of woodland, but most often found with conifers, in large groups or rings. Strongly decurrent gills and an aromatic smell all help to identify it

References: 
Breitenbach & Kranzlin (1991) Fungi of Switzerland, Volume 3, Boletes and Agarics, 1st Part
Overall (2017) Fungi: Mushroom & Toadstools of parks, gardens, heaths and woodlands