La madera de cinco especies de Zanthoxylum L. (rutaceae) con distribució n en México The wood of five species of Zanthoxylum L. (rutaceae) with distribution in Mexico

Wood anatomy of five species of Zanthoxylum is described and compared. Qualitative and quantitative characters were analyzed through multivariate analyses to identify wood characters that permit to distinguish among species or to group them in the recognized sections within the genus. The species shared the diagnostic wood character for Zanthoxylum as of vessel wall thickness < 4 µm, intervessel pits < 6 µm, except for Z. hidalgense , libriform fibers, and parenchyma in marginal bands. The semiring-porosity distinguished the studied species of other Zanthoxylum species . The occurrence of druses in vessels and septate fibers are reported for the first time for the genus. The results of prin cipal component analysis and the phenogram support the recognition of the five species studied based con a unique combination of wood characters; however, wood characteristics do not always support inclusion in the current sections. Zanthoxylum purpusii is recognized by the vertical traumatic canals