A seed bank (or a germplasm bank) stores seeds to conserve the genetic diversity of wild species. Up until recently, there were no available seeds of species native to the Sierra del Lacandón National Park. Such trees and plants are necessary for the reforestation and enrichment of some of the areas damaged by human encroachment of the National Park. Fortunately we have now identified seed sources and established germplasm banks of the following native trees and plants: cedar