Canna grown especially for its edible rootstock from which arrowroot starch is obtained [syn: achira, indian shot, arrowroot, Canna indica, Canna edulis]
Canna \Can"na\, n. [L., a reed. See Cane.] (Bot.)
A genus of tropical plants, with large leaves and often with
showy flowers. The Indian shot (Canna Indica) is found in
gardens of the northern United States.
[1913 Webster]