Tabebuia is a neotropical genus of about 100 species[1] in the tribe Tecomeae of the family Bignoniaceae. The species range from northern Mexico and southern Florida south to northern Argentina, including the Caribbean islands of Hispaniola (Dominican Republic, Haiti) and Cuba. The generic name is derived from words used for the trees by the indigenous peoples of Brazil.[2]
Well-known common names include Ipê (commonly misspelled "epay"), Poui, trumpet trees and pau d'arco.

http://en.wikipedia.org/wiki/Tabebuia