Watermelon peperomia (Peperomia argyreia) belongs to the Piperaceae (the Pepper family). It is an evergreen herb that is native to northern South America, including Bolivia, Brazil, Ecuador, and Venezuela. This herb grows to about 20 cm tall. The leaves are green, ovate, entire margins, with a showy mixture of silver and white stripes. The tiny green flowers appear on stalks in the summer.