Hi! On the fence at work, in zone 9b, we have a huge mystery vine. It looks like a cucumber or melon vine, with small yellow flowers the bees seem to love. It's produced tiny little watermelon looking fruit, about golf ball sized, that turn bright yellow after a while. I picked one and cut it open and it kind of looks like a cucumber inside. I don't think it's a plum granny or cucumelon, but i have no idea what else it could be