Iris is a type of flowering plant known for its showy flowers, representing beauty in gardens. Columbines are a genus of perennial plants found in meadows and woodlands throughout the Northern Hemisphere, representing nature's spirit in helping characters Mary and Colin. Poppies are flowering plants in the poppy family that are often grown for their colorful flowers, such as the poppies growing in a garden. Roses come in over 100 species and symbolize Colin's mother's love.