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Found my first wild edibles this summer in Vermont
(thelemmy.club)
Obligatory reminder to not eat things you harvest yourself unless you're 100% positive on ID. Join your local society if you want to learn!
Yeah, top two photos are oysters, and the bottom two are chants.
Based on the time of year and their appearance, I think the oysters were a native oyster variety, but your point still stands in the general case :).