Butterfly Ginger, White Ginger, Garland Lily
Hedychium coronarium J. Koenig is the correct and accepted scientific name for Hidden Ginger. Both the genus and species were first named and described by Johann Gerhard Koenig in Observationes Botanicae in 1783.
According to the Wikipedia, Hedychium coronarium is originally from the Himalayas region of Nepal and India. It was brought to Brazil by African slaves who used the leaves for mattresses. It is also the national flower of Cuba. The plant has become invasive in some parts of the world including Hawaii. For further reading go here: https://en.wikipedia.org/wiki/Hedychium_coronarium.
A good friend of mine gave me quite a few of these plants in the fall of 2011. I planted them in the backyard among the Colocasia esculenta. They did well, and a few flowered in 2012. The Butterfly Ginger grow to a height of 4-6 feet in sun to part shade. They are winter hardy in USDA zones 8a-11 (10-40 degrees F.).
I hated to leave the Butterfly Ginger behind at the mansion when I moved back to mid-Missouri in February 2013. They are not hardy in this zone, and I am not sure about digging them and storing them for the winter. Maybe someday I will try it and see what happens.
If you any comments, questions or suggestions, I would like to hear from you.