Tabebuia es un género que comprende alrededor de un centenar de especies de árboles nativos de la zona intertropical de América, extendidas desde México, Perú y el Caribe —donde se encuentra la mayoría de las especies— hasta el centro-norte de Argentina y Paraguay. En 1970 un nuevo género (Handroanthus) fue creado para situar muchas de las espécies de Tabebuia. Es el árbol nacional del Paraguay, donde se lo denomina "tajy".

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Tabebuia is a genus of flowering plants in the family Bignoniaceae. The common name "roble" is sometimes found in English. Tabebuias have been called "trumpet trees", but this name is usually applied to other trees and has become a source of confusion and misidentification. Tabebuia consists almost entirely of trees, but a few are often large shrubs. A few species produce timber, but the genus is mostly known for those that are cultivated as flowering trees. Tabebuia is native to the American tropics and subtropics from Mexico and the Caribbean to Argentina. Most of the species are from Cuba and Hispaniola. It is commonly cultivated and often naturalized or adventive beyond its natural range. It easily escapes cultivation because of its numerous, wind-borne seeds. In 1992, a revision of Tabebuia described 99 species and one hybrid. Phylogenetic studies of DNA sequences later showed that Tabebuia, as then circumscribed, was polyphyletic. In 2007, it was divided into three separate genera. Primavera (Roseodendron donnell-smithii) and a related species with no unique common name (Roseodendron chryseum) were transferred to Roseodendron. Those species known as ipê and pau d'arco (in Portuguese) or poui were transferred to Handroanthus. Sixty-seven species remained in Tabebuia. The former genus and polyphyletic group of 99 species described by Gentry in 1992 is now usually referred to as "Tabebuia sensu lato".

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