A particularly slimy fungus in association with conifers, especially pines (Picea). Infrequently recorded and biased towards Scotland

References: 
Breitenbach & Kranzlin (1991) Fungi of Switzerland, Volume 3, Boletes and Agarics, 1st Part
Watling & Hills (2005) British Fungus Flora 1: Boletes and their Allies
O'Reilly (2016) Fascinated by Fungi