Calathea Lancifolia (or Rattlesnake plant) is a wonderfully showy houseplant. It has upright, lance-shaped leaves with long wavy edges that form in clumps, spreading slowly over time. The leaves are variegated with dark green strokes on a pale green background. The undersides are a burgundy red and velvety to the touch. The Rattlesnake plant is also sometimes known as Calathea insignis.
Calathea is a genus of plants belonging to the family Marantaceae. There are several dozen species in this genus. Native to the tropical Americas, many of the species are popular as pot plants due to their decorative leaves and, in some species, colorful inflorescences. They are commonly called calatheas or (like their relatives) prayer plants.