Calathea lancifolia (Rattlesnake plant) is an attractive tropical houseplant with slender pointed leaves decorated with light and dark green patterns. The main attraction is its lance-shaped leaves with dark ellipse patterns on the upper side and purple colors on the underside. As an evergreen perennial, Calathea lancifolia is easy to grow indoors. The rattlesnake plant’s exotic foliage adds a touch of the tropics to any indoor décor.