NATS truffle and truffle-like fungi 10: Pachyphloeus thysellii sp. nov. (Pezizaceae, Pezizomycotina)

Abstract

An undescribed truffle found on the Fort Lewis Military Reservation near Olympia, Washington, is described as Pachyphloeus thysellii. This new species, associated with Pseudotsuga menziesii, closely resembles Pachyphloeus prieguensis from southern Europe. It differs from the latter in having yellow veins and patches showing among the minute, brown warts on the peridial surface, smaller asci, and a different mycorrhizal host.