Calatheas (and Marantas) are called prayer plants because their leaves move up and down throughout the day. This prayer movement, called nyctinasty, is a circadian response to changes in light and Cardinal airplant, or giant airplant, Tillandsia fasciculata, Big Cypress Swamp, Florida, USA Stock Photo Alamy Nothing makes you realize how big a ponytail palm can get until its time to repot one. Fresh soil, a bigger pot, and a whole lot of lifting later this giant is ready to keep growing ., Live Plant Ficus bonsai Tree, 300 cm (10 ft) Types of Elephant Ears