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Boletus barrowsii
''Boletus barrowsii'', also known in English as the white king bolete after its pale colored cap, is an edible and highly regarded fungus in the genus ''Boletus'' that inhabits southwestern North America. Found under ponderosa pine and live oak in autumn, it was considered a color variant of the similarly edible ''B. edulis'' for many years.
==Taxonomy and naming==
It was officially described by American mycologists Harry D. Thiers and Alexander H. Smith in 1976 from a specimen collected near Jacob Lake, Arizona on August 21, 1971 by amateur mycologist Charles "Chuck" Barrows, who had studied the mushroom in New Mexico. It was previously held to be a white colour form of ''Boletus edulis''.〔 A 2010 molecular study found that ''B. barrowsii'' was sister to a lineage that gave rise to the species ''B. quercophilus'' of Costa Rica and ''B. nobilissimus'' of eastern North America.
''Boletus barrowsii'' could possibly be confused with the similarly pale-capped ''Boletus satanas'', though the flesh of the latter stains blue when cut or bruised, and it has a reddish stem and pores. The latter species is poisonous when raw.
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