 More than other "Canna" species, "C. discolor" is used extensively in agriculture in Asia.It grows high yields of very large rhizomes, sometimes the size of a man's arm, exceedingly rich in starch.In the last three decades of the 20th century, "Canna" species have been categorised by two different taxonomists, Paulus Johannes Maria Maas from the Netherlands and Nobuyuki Tanaka from Japan.