Prayer Plant Calathea 'Medaillon' XLThis Calathea 'Medallion' has a striking appearance and the graceful, white lines on the alternating dark and light green leaf are sure to catch your eye. In the evening, you'll also be able admire their red bases as they go to sleep. The leaves will then curl up together. They need that, because there's a lot of hard work waiting for them during the day! This plant helps to freshen up the air by absorbing pollutants and converting them into oxygen!