Resumen

GUEVARA-FEFER, Fernando. A new species of Bursera (Burseraceae), endemic to the lower basin of the Balsas River in the States of Michoacan and Guerrero, Mexico. Act. Bot. Mex [online]. 2010, n.92, pp. 119-128. ISSN 0187-7151.

A new species of Burseraceae is described and illustrated. Bursera xolocotzii is a tropical deciduous florest tree restricted to the surroundings of Infernillo region (Michoacán and Guerrero states). This species is part of the section Bursera, remarkable for its glabrous leaves, a strong and persistent smell of its young leaves and branchlets, its trimerous to tetramerous feminine flowers, and tetramerous to trimerous, rarely pentamerous masculine flowers, and its grey, smooth non exfoliating cortex. It presents similitudes with B. laurihuertae Rzed. & Calderón and with B. lunanii (Spreng.) C. D. Adams & Dandy ex Proctor.

Palabras llave : Bursera; Burseraceae; Michoacán; Guerrero; Mexico; taxonomy.