Correct me if I’m wrong, but does this not look like a young, green butternut squash? I spotted it all tangled up in the volunteer pumpkin. A brief investigation concluded that there isn’t some sort of mutant vine but actually two vines living quite comfortably together.
So perhaps we’ll be having both butternut and pumpkin soup this fall.
Now if I can only figure out what the mysterious vines with the tiny yellow flowers that insist on trailing way out of the garden boxes and onto the lawn are.