Alocasia Cucullata Plant : Alocasia Cucullata Useful Tropical Plants : Nevertheless, this species has also also been identified as a cause of diseases in a range of cultivable plants, such as cotton, sweet onion, rice, maize, sorghum, bamboo, walnut, an ornamental plant called chinese taro (alocasia cucullata), and a grass called onion couch (arrhenatherum elatius).