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Norvell, Lorelei L. & Ronald L. Exeter. Phaeocollybia in western North America 5: P. ochraceocana sp. nov. and the P. kauffmanii complex. Mycotaxon 102: 315-332. 2007.

ABSTRACT: A new phaeocollybia is described from Oregon and California temperate coniferous rainforests that shares with P. luteosquamulosa a trilaminate suprapellis, a feature unusual in the genus. Phaeocollybia ochraceocana differs in its orange to tawny coloration, more abundant pileus squamules, more extensive suprapellis, a mediopellis lacking in roughened gel-encrusted hyphae, cheilocystidia that rarely produce apical extensions and lack gel incrustations, and much smaller basidiospores. Both species belong to the P. kauffmanii complex, a morphologically defined group characterized by robust stature, vertical-monopodial pseudorhizae, stuffed stipes with cartilaginous rinds surrounding firm pith, brown verruculose limoniform basidiospores, and thin-walled, clavate cheilocystidia. A revised key to the complex incorporates the new and four morphologically similar species.

KEYWORDS:  Agaricales, Basidiomycota, Cortinariaceae, ectomycorrhiza, Northwest Forest Plan

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