Mini Watermelon Peperomia is a variation of the regular Watermelon Peperomia, aka Peperomia argyreia. The rounded, fleshy leaves marked with silver and green stripes that resemble the markings of a watermelon earned it its common name. Like other peperomias, the Watermelon Peperomia is non-toxic, making it safe to keep around your furry friends.