This isn't how i wanted it to turn out at all...
This is the Chloro Ghost. It's the unkind soul of those that have with unpleasant and malicious thoughts still remaining. The souls take over a plant and sprout human-like heads that can be poisonous or dangerous if big enough. They can spread to plants that are small like a flower, as seen in the figure, or something as large as a tree.
I certainly hope we have to describe them, otherwise I feel like a dumbass.
It isn't my best work at all... but oh well I have a migraine.