Queensland arrowroot. An edible starch from a canna closely related to canna lilies. This was a pre-Conquest Inca food plant and may be found in Peru and Ecuador and has spread to be used in India and as far as Australia. It is a versatile plant of which the green shoots may be eaten as a vegetable, the rhizome, which is large, round and red, can be eaten raw. It is also described as a fleshy underground stem. It may also be prepared in the same way as a potato or used in the same ways as flour. It is a great source of easily digested carbohydrate. This ideal plant is easy to grow and to harvest. The tubers are hardy and multiply readily in good soil.