Figure 4 from: Pereira AJ, Francisco A, Porto M (2016) Flora-On: Occurrence data of the vascular flora of mainland Portugal. PhytoKeys 69: 105-119. https://doi.org/10.3897/phytokeys.69.9432

Figure 4 - Number of occurrences (a) and species (b) recorded in Portugal mainland per 10×10 km square. The dataset used in this analysis includes a total of 253,310 records. Numbers were classified with geometrical intervals. The dots are placed at the centre of WGS84 UTM squares.