The Cortinarius also prefers their shelter.
"Among the Mushrooms" by Ellen M. Dallas and Caroline A. Burgin
Cortinarius (Cor-ti-na'ri-us), 161. cinnamomeus (cin-na-mo'me-us), 162, fig.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc." by George Francis Atkinson
The Violet Cortinarius is a very beautiful mushroom and one easy of recognition.
"The Mushroom, Edible and Otherwise" by M. E. Hard
The recorded edible species of the spore section Dermini are found in Pholiota, Cortinarius, and Paxillus.
"Student's Hand-book of Mushrooms of America, Edible and Poisonous" by Thomas Taylor