Hybrid origin, North America
Europe, Morocco, Western Asia
Deciduous forests, Rocky areas, rocky outcrops
Boggy areas, Dry and Young forest Heaths, Mountain Slopes, Temperate Regions
A2, A3, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
A1, 2a, 2b, 3a, 3b, 4, 5, 6, 15, 16, 17