Only the stems and leaves are edible that too mostly in Japan and South-East Asia. Some species are considered invasive, especially along the Gulf Coast in the U.S. Alocasia Macrorrhizos: It belongs to the Araceae family, native to Malaysia, and … Colocasia gigantea, commonly called elephant’s ear, is a large, stemless, tuberous, frost-tender perennial of the arum family which typically grows to 4-7’ tall and as wide and … Colocasia, commonly known as elephant ear or taro, is a plant species that belongs to the Araceae family. Colocasia Gigantea: Its corms are inedible. Check with … Noteworthy Characteristics. Alocasia grows well in big pots; they can thrive in the summertime and then be brought indoors in the winter. How to Grow Colocasia. https://www.gardenia.net/plant/colocasia-gigantea-thailand-giant