Taxonomic updates in (Bignoniaceae): A new Mexican species and the re-establishment of the giant-leaved .

In this study, we analyzed the morphological affinities of the 24 species of based on detailed morphological studies and multivariate cluster analyses. Our results suggest that the genus includes six morphological groups that can be easily distinguished based on floral and fruits characteristics: group, group, group, group, group, and group. A new species from Mexico, , is described.