Mushrooms thought to be closely related, based on their appearance and habitat, may be reclassified as belonging to widely separated groups, on the basis of DNA evidence. Species divisions are not immutable facts, but expert judgments based on what's known at the time. This is a morel that popped up in our back yard when we lived in California. Nobody can explain this. They are highly prized and wonderful for cooking.
People have their secret places where they find morels.
We picked a whole bowl of morels. I was fine, so we ate them for several days in various dishes. It was a rare treat. They didn't come back the next year.