Endemismos vegetales cubanos presentes en las playas rocosas.

They were identified with the name of rocky beaches to the coasts formed by almost always limestone reefs, cavernous where the sea penetrates, whose effects are detected several kilometers away. These coastlines are covered with arid thickets on skeletal tropical brown soils. There, eight regions are identified in which wealth is determined in Cuban endemisms separated by distribution categories. In them, taxonomic wealth was determined in families, genres and infra-generic taxa, by distribution category and by Neotropical evolutionary centers where taxa are included. To this were added four non-taxonomic variables: intensity of speciation, index of biological aridity, elevation, and geographical length. With this information the correlation between variables, the similarity between regions, the families that characterize this vegetation, the degrees of biological aridity by territory and the predominant evolutionary groups was determined. The most interesting results were the predominance of taxa of the Chaco evolutionary group, the predominant families and their causes, the high degree of biological aridity of these regions, their occasional lack of coincidence with the climatic aridity and the causes that cause this anomaly.