RIQuEzA DE EspECIEs , ENDEMIsMO y EvALuACIÓN DEL RIEsGO DE ExTINCIÓN DEL GÉNERO BuRsERA (BuRsERACEAE ) EN LA pENÍNsuLA DE BAJA CALIFORNIA

Background: Bursera is a genus native to tropical America and groups around 114 species. Western Mexico is its main center of diversification, and the south of the Baja California Peninsula is an important center of endemism for the genus. Questions: How many species of Bursera are there in the Baja California Peninsula? Where are they distributed? Which is their status of conservation? Studied species: The species of Bursera of the Baja California Peninsula. Study site and dates: The Baja California Peninsula, Mexico; from 2021 to 2022. Methods: A database was generated from electronic repositories, herbaria, field collections and specialized literature. Species richness was calculated by political division, biogeographic province, ecoregion, and a 40 x 40 km grid. Species distribution models were built, and the conservation status was estimated for each taxon using the IUCN B2 criterion. Results: In the Baja California Peninsula 11 species of Bursera were documented, of which seven are endemic. Species richness was concentrated in the Cape Tropical Shrubland at elevations between 0 and 500 m. Five species were classified in some risk category. Conclusions: The present work expands knowledge about the distribution and conservation status of Bursera in the Baja California Peninsula.