Miguel Ángel Pérez-Farrera

A reassessment of the Ceratozamia miqueliana species complex (Zamiaceae) of southeastern Mexico, with comments on species relationships

Abstract The Ceratozamia miqueliana species complex has been revised from a morphological, anatomical and biogeographical perspective. The complex consists of five closely related species, one of which is new, C. santillanii sp. nov., and is described and illustrated from the northern highlands of Chiapas. The five species, although not sympatric, occur in the ‘Arc’ Pleistocene floristic refuge that covers southern Mexico, including northern Oaxaca and Chiapas, as well as southern Tabasco and Veracruz. The five species are characterised by oblong, oblanceolate to widely ob‐lanceolate leaflets with decumbent or erect megastrobili when ripe. The species complex consists of C. becerrae Perez‐Farr., Vovides & Schutzman C. euryphyllidia Vazq.Torres, Sabato & D.W. Stev., ´C. miqueliana H. Wendl., C. zoquorum Perez‐Farr., Vovides & Iglesias and the new species which is related to C. zoquorum, but differs from these in leaf, male and female cone growth habit, as well as inter‐leaflet distance. Discriminant analysis using the five species with 14 variables showed significant differences (Wilks λ test, P < 0.01) for four functions among the five species. Mahalanobis distances were also highly significant among the five species (P < 0.01). Ceratozamia euryphyllidia and C. becerrae were the most distant, whereas C. zoquorum and C. becerrae were closest.

Nuevo registro de Bdallophytum oxylepis (Malvales: Cytinaceae) para Chiapas

Se registra por primera vez la planta parasita Bdallophytum oxylepis para el estado de Chiapas. Se trata de una especie endemica a Mexico y conocida de unas pocas localidades en los estados de Jalisco, Michoacan y Oaxaca. Este registro representa una ampliacion en su distribucion y se incrementa a dos el numero de especies de Bdallophytum en Chiapas y en la region del proyecto de Flora Mesoamericana.