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Looking for some confirmation that these beauties are Oyster Mushrooms?
(sh.itjust.works)
Spotted this awesome cluster on a walk today and grabbed a couple, fairly certain they are Pleurotus ostreatus.
Oysters do cup upwards, but only when they are about sporulate and not quite as drastic as the ones in this picture. It's about the only way to tell that they are ready to harvest before they make a mess of your grow area.