Costus guanaiensis

References

1. [1]Monocotyledons and Gymnosperms of Puerto Rico and the Virgin Islands — Acevedo-Rodríguez P. & Strong M.T. (Editors) · Smithsonian Institution; Washington. · 2005 · http://www.biodiversitylibrary.org · ISBN 0097-1618 ↩︎A treatment of the monocots and gymnosperms growing in Puerto Rico and the Virgin Islands. It can be downloaded from the Internet.
2. [2]Cornucopia II — Facciola. S. · Kampong Publications, California. · 1998 · ISBN 0-9628087-2-5 ↩︎The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.