In the parallel universe, known as Earth-One, Jason Woodrue is an exile from an interdimensional world known as Floria inhabited by Dryads. Not long after his arrival on Earth, he begins calling himself the Plant Master. Woodrue begins uses his advanced botanical knowledge to control plant growth in an attempt to take over the world. He is defeated by the superheroic Atom. By the following year, the Floronic Man becomes a member of the Secret Society of Super-Villains.