Oh, Sunk! I thought better of you!
Most of our cucurbits are volunteer "squashkins" every year.
Each year they are different, and dominated by one or two (almost) recognizable types, but we also get several other singletons or duos. All fruit; all are good; some are summer; some are winter; some can used either way. Haven't had a bad tasting one yet!
They come up from the fall & winter's squash/pumpkin guts that get tossed into the composter, then are tilled under in the spring.
We also plant a few known-variety seeds, just to make sure we have a good crop...and to make the next mix equally interesting.
:’) Thanks AGR.