Most likely native to Southeast Asia, colocasia (Colocasia esculenta, Zones 7b–12) is used by many gardeners for its large, tropical-looking foliage. This plant also has a long history of being used in cooking. Visitors to Hawaii are often treated to poi, a starchy Polynesian edible food paste made from its rootlike corm. Common names of colocasias include taro, eddo, dasheen, and elephant’s ear. Elephant’s ear is the most commonly used common name, but that can be confusing because plants called elephant’s ear come from several different genera, including Colocasia, Alocasia, and Xanthosoma, all of which are members of the arum family (Araceae). While there are several different species of colocasia, cultivars and hybrids of Colocasia esculenta are the main ones you will find being sold in garden centers to home gardeners.