Here in Southern California we've always called something similar "Wild Blackberry" I have some along the back of our lot, between us and our neighbors. In the Spring they produce a small white flower before giving us a few rather small blackberries. The tortoises enjoy a few of the young, green shoots, but won't touch the mature greenery. Spoiled, I'd say.I'm pretty sure berry vine leaves are edible, but wait for others to chime in.