NATS truffle and truffle-like fungi 13: Tuber querckola and T. whetstonense, new species from Oregon, and T. candidum redescribed

摘要

Two new truffle species, Tuber quercicola and T. whetstonense (Tuberaceae, Pezizales), are described from southern Oregon, USA. Tuber candidum is redescribed. These hypogeous species are ectomycorrhizal with Quercus garryana. Descriptions of T. whetstonense and T. candidum include ectomycorrhizal morphotypes. Recent research on biodiversity of ectomycorrhizal fungi in oak woodlands included a survey of hypogeous sporocarps at Whetstone Savanna Preserve in southern Oregon (Valentine et al. 2004, Franket al. 2004, Frank 2005). The site is a remnant woodland of Quercus garryana Dougl. ex Hook, interspersed with Ceanothus cuneatus (Hook.) Nutt. shrublands. Eighteen species of hypogeous fungi were collected for this survey (Frank 2005), of which three were in the genus Tuber: T. candidum, T. quercicola sp. nov. and T. whetstonense sp. nov.