wild butternut squash?
 

Growing out of my compost pile is what looks
like a butternut squash vine (growing over
the chainlink fence the compost pile is next to).
The squashes are the color and shape of
a butternut squash, but most are larger than
I see in the grocery store. One I just picked
is about 15" long, but one other still on the
vine is oval shaped. Most are the long type.

I haven't had any butternut squash in years so
it can't be from seeds I threw in the compost.
I suppose I can just eat a bit to see if it's
edible but thought I'd ask here in case I might
be poisoning myself! :) And isn't this the
wrong season for butternut squash?

Thanks for any help.

Gail
near San Antonio TX Zone 8