Rattlesnake PlantRattlesnake Plant Calathea lancifolia Let's talk about the leaves on this Calathea lance shaped with wavy edges that can grow up to 30 inches in length. The colouring of this tropical plant is also something to shout about, with dark green spots decorating its leaves, coupled with undersides in burgundy red tones. Like other Calathea plants, the Rattlesnake will move it's leaves up at night and lower them in the day in accordance with its circadian