I was thinking of some kind of parasite-spreading splinter tree of something.
Like, where you get splinters for example. I've thought about this idea recently.
Maybe like a tree, when touched, will give the organism touching it splinters which are secretly larvae, and bury under your skin and are unable to be removed like normal because they slowly grow bulbous in the embedded end, meaning a lot of flesh is going to get lost upon removable.
Then they grow and stuff and begin to multiply, and plant-like growths will grow on the victim, unless early surgery is performed. After a set time, a new sapling will begin to grow, living off of the life-forms energy and body until they expire, and will plant itself there and then. It's an idea in development, what do you think?