Flowers are one of the reproductive strategies used by (some) plants. So the answer is yes.
Cauliflower
Clematis has several white flowers that are fragrant. Sweet autumn clementine is great in the fall.
A peony is a spring blooming perennial plant. It comes in many colors but not blue. It is one of the most fragrant flowers.
Sweet pea (Pisum odoratum)
Sunflowers can have very large flowers. Dahlias can have flowers the size of dinner plates. Peonies also have large flowers.
A banana is not a tree, it is a large herbaceous plant and they do have large flowers. The female flowers develop into fruit
Flowers are one of the reproductive strategies used by (some) plants. So the answer is yes.
Helianthemum.
Could be lilac.
A peony is a flowering plant of the genus Paeonia with large fragrant flowers.
Could be lilac.
Cauliflower
Clematis has several white flowers that are fragrant. Sweet autumn clementine is great in the fall.
A peony is a spring blooming perennial plant. It comes in many colors but not blue. It is one of the most fragrant flowers.
hibiscus
Sweet pea (Pisum odoratum)