Figure 1 A map of the species richness of brambles in Poland in the ATPOL grid of 10 × 10 km squares, based on the distribution of 113 species. The diameter and colour of points on the map denote the number of species in particular cartogram units: purple – 30–37 species, red – 20–29 species, orange – 10–19 species, green – 5–9 species and blue – 1–4 species. Names of the micro-hotspots marked by ellipses are: I) Kotlina Kłodzka Basin, II) Moravian Gate, III) forelands of the northern Carpathians, IV) Wyżyna Małopolska Upland, V) Wielkopolska Lowland, VI) north-eastern foreland of the Sudetes Mts and VII) Lower Oder River valley.