Synopsis for “The Green Thing!”
A botanist has a theory that even plants have intelligence and so he develops a serum to increase it. He travels to an island looking for a rare highly-developed plant, but can’t find one, and so he injects the serum into a simple weed. Not only does the serum work, giving the plant reasoning capability, but it increases its height and strength as well. The weed harbors plans of conquest, and so to prevent the plant from reaching the mainland, the botanist destroys the motor from his boat. The weed declares that his life is forfeit and so he runs off to hide in a cave, where he finds a member of the plant he was originally seeking. He injects the serum into it, and the weed offers to ally with it in the conquest of mankind, but the highly developed plant refuses and destroys the weed. He admonishes the botanist to give up his experiments and fashions two oars for his boat so that he can return to the mainland alone.