Hypsizygus ulmarius – Elm Oysters

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Elm oysters (Hypsizygus ulmarius) are an edible and easy-to-identify mushroom. Elm oysters are in a different genus than the “true” oyster mushrooms. They are named after their appearance which resembles true oyster mushrooms in the Pleurotus genus.
Elm oysters are usually found on elm trees from August-December. They can be differentiated from true oysters by their gills which do not run down its stem. The caps develop a slight depression in the center and a cracked appearance when the mushroom is mature.
Elm oyster mushrooms are also cultivated, but the cultivated variety looks very different than the wild version. Elm oysters have a mild woodsy taste.

Written by Amy Demers, founder of the Connecticut Foraging Club. To learn more about foraging in Connecticut, check out our upcoming classes.

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