Hybrid origin, North America, Europe, Africa, Asia
Europe, Asia
meadows, Shady Edge, Woods
Dry areas, Roadsides, stream banks, Stream side, 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