This grew from a packet of "mixed small gourds." I'm kind of thinking of it as my "Little Shop of Horrors" plant because the stems are so spiny!!
This is a picture of a "baby" gourd on this plant, and on the right is a close-up of the spines on the stem
It looks like it could be a "bottle gourd," from the shape, but I also have some "mini bottle gourds" from a separate seed packet and the stems on those are only very mildly prickly, like most squash, etc. seem to be.
Thanks!