The yellow flower of Fritallaria Imperialis, the Lutea Maxima variety. Fritillaria is a genus of Eurasian, North African, and North American plants in the lily family. This one bloomed in the spring of 2016 in Minneapolis, Minnesota.
Aquilegia, known as Columbine or Granny's Bonnet, is a group of hardy perennial plants that are found in meadows, and woodlands throughout the Northern Hemisphere. It's a beautiful and hardy native garden plant. It's favored by hummingbirds.