A starch is made from the rhizomes that is very similar to, and a good substitute for, arrowroot starch which is derived from an unrelated plant, Maranta arundinacea. The young rhizomes of Indian shot are sometimes eaten; they are sweet but woody and fibrous.
The seeds are perfectly round and very hard and reportedly were used as buckshot for flintlock muskets when lead shot was not available. Nowadays the seeds are commonly used as beads in natural seed jewelry for necklaces and especially rosaries. (but if going buck huntin and out of lead you know what to do:-) and we ain't just whistlin oh Suzianna-they are hard as lead. (Soak and or score before planting)
There are several dozen species in the genus Canna, but most of what gardeners see are the results of hybridization between a handful of tropical species, and distributed under the name Canna x generalis or simply “hybrid cannas.” Canna indica was probably one of the original parent species. You will receive 12 seeds, grown organically in CA. Thank you for looking.