Anatomía sistemática de la familia Anacardiaceae en México. l. La corteza secundaria de Tapirira Aublet.

Tapirira bark anatomy is described for the species distributed in Mexico. Results show that there are anatomical characters with diagnostic value that contribute to distinguish-between species. Bark ray dimensions (height and width) and diameter of the bark radial canals distinguish T. chimalapana from T. mexicana as do wood ray dimensions and wood radial canals. Ondulate periderm, esclerified phelloderm and yellow-brownish exudate characterize T. chimalapana, while T. mexicana possesses straight periderm, esclerified phellem and reddish exudate. Both species show a laminated rhytidome, more conspicuous in T. mexicana. Further studies in the species of T. guianensis group are essential to support the diagnostic value of the aforementioned characters.