A genus of basidiomycetous fungi, family polyporaceae, order polyporales, that grows on logs or tree stumps in shelflike layers. The species P. ostreatus, the oyster mushroom, is a choice edible species and is the most frequently encountered member of the genus in eastern north america. (Alexopoulos et al., Introductory mycology, 4th ed, p531)

Symptoms and diagnosis



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