The flowers kinda sorta remind me of a dandelion, only, there's multiple heads on it, AND, it's kinda like a thistle at the bottom, being sharp & pointy.
Yeah I know! I've been battling greenbriar to no avail, without any success...and they're not even pretty They have runners...and if ya pull on up, 10 more seem to shoot up. Kinda like gray hairs (or at least that's what I've heard)