Evaluation location: , United States
Listing of Omernik Level III Ecoregion where germplasm was obtained. Ecoregions determined using Omernik, J.M., 1987, Ecoregions of the conterminous United States (map supplement): Annals of the Association of American Geographers, v. 77, no. 1, p. 118-125, scale 1:7,500,000.