I feel I'm starting to get back into things a bit more now. This I feel has turned out a bit better than I thought it would. I rather like this one. As for what it is? Just a plant monster, I'd imagine an inhabitant of an extensive forest region, taking on the characteristics of other plants it encountered and growing until what is seen now.
I might make this a species.
Also a bit of clarification. The "Ribs" are just more plant material. An early adaptation to fool any one foolish enough to fall for it and think its undead.
I think I will call it "Barc."