North America, Mexico, Central America, South America
Europe, Northern Africa, Western Asia
Neck, Really Big Hybrid, Waltham
A. campestre var. campestre - downy fruit
A. campestre var. leiocarpum (Opiz) Wallr. (syn. A. campestre subsp. leiocarpum) - hairless fruit
A1, A2, A3, H1, H2, 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
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17