Europe
Northeastern United States, Mid-Atlantic United States, Southeastern United States, North-Central United States, Central United States, South-Central United States
Bog Garden, Dappled Shade, Shady Edge, Woodland Garden
Roadsides, sand dunes, Waste areas
21,22
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