The answer seems to be yes. But which ones? Pumpkins are so named because of their shape, not scientific at all. So would all squash leaves be edible? I find this unlikely as there are bitter wild squashes that are toxic.
A pumpkin is a cultivar of winter squash that is round with smooth, slightly ribbed skin, and most often deep yellow to orange in coloration.[1] The thick shell contains the seeds and pulp. The name is most commonly used for cultivars of Cucurbita pepo, but some cultivars of Cucurbita maxima, C. argyrosperma, and C. moschata with similar appearance are also sometimes called "pumpkin".
https://en.wikipedia.org/wiki/Pumpkin
I have also seen second-hand references to selling and eating edible gourd vines ends. But again, which ones are safe?
What do you think?