Northeastern United States, Mid-Atlantic United States, Southeastern United States, Central United States, Canada, Mexico
Aegean Islands, Central Asia, Middle East, North Africa, Southern Europe, Western China
Plains Cottonwood, Rio Grande cottonwood
Crocus abantensis, Crocus adanensis, Crocus biflorus, Crocus chrysanthus, Crocus korolkowii
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21
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