Lentinellus is a genus of white rot, wood decay, lamellate agaric in the family Auriscalpiaceae, further characterized in part by rough-walled, amyloid spores produced on lamellae with jagged edges. Typically, thick-walled hyphae in the fruit body are in part amyloid, and frequently the taste of the mushrooms is acrid (burning, spicy). The widespread genus has been estimated to contain 15 species. Mycologists Ronald Petersen and Karen Hughes considered 24 species in their 2004 world monograph of the genus.

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