''Handroanthus guayacan'', is a

Bignoniaceae Bignoniaceae is a family of flowering plants in the order Lamiales commonly known as the bignonias or trumpetvines.Vernon H. Heywood, Richard K. Brummitt, Ole Seberg, and Alastair Culham. ''Flowering Plant Families of the World''. Firefly Books: ...

tree native to South America and the Mexican states of Campeche, Chiapas, Oaxaca, Quintana Roo, Tabasco, and Veracruz.

References

guayacan ''Guaiacum'' (''OED'' 2nd edition, 1989.Entry "guaiacum"
in
Garden plants of South America Ornamental trees Trees of Campeche Trees of Chiapas Trees of Oaxaca Trees of Quintana Roo Trees of Tabasco Trees of Veracruz Plants described in 1854 {{Bignoniaceae-stub