Checklist of the vascular plants of the Cantabrian Mountains

We present the first standardized list of vascular flora Cantabrian Mountains, a transitional zone between Eurosiberian and Mediterranean biogeographic regions in northwestern Spain. The study area comprises 15000 km2 divided UTM grid cells 10 km x km, for which we revised occurrence data reported Spanish Plant Information System (Anthos) online database Iberian Macaronesian Vegetation (SIVIM). used semi-automatic procedure to standardize taxonomic concepts into single names, was further updated by expert-based revision with support national regional literature. In current version, checklist Mountains contains 2338 native species subspecies, from 56 are endemic area. nomenclature follows Euro+Med 97% taxa, including annotations when other criteria has been taxa uncertain status. also provide 492 non-native that were erroneously area, local apomictic phylogenetic tree linked List, calculation Ellenberg Ecological Indicator Values 80% flora, information about life forms, IUCN threat categories legal protection Our review demonstrates how mountains represent key floristic region southern Europe relevant phytogeographical hub south-western Europe. all related freely accessible digital repository uses basic applied research