ENDEMIC PHYTOTAXA OF THE PENINSULA OF YUCATÁN

We present a revision of the historical treatment of the vascular plant species that have been considered endemic to the Yucatán Peninsula. The peninsula is considered geomorphologically and biogeographically a biotic province; therefore, the Mexican states of Campeche, Quintana Roo, and Yucatán, as well as the Peten of Guatemala and northern Belize, are included. The study includes the floristic and nomenclatural revision of all species of the Yucatán Peninsula, which at one time were considered to be endemic. It is based on pertinent literature and the revision of herbarium material collected to date. We currently recognize 168 endemic taxa of this region, for which we present their nomenclatural status, distribution in the region, growth form, common names, and uses. We present a list of the species and names excluded for nomenclatural reasons and because their distributions extend beyond the peninsular limits. With this revision, the percentage of endemism recognized for this region is reduced to 7.3% of its flora.