Question

which parts of the flower are known as keel, standard or wings

Answer 1

Sweet pea is the flower in which the names standard, keel, and wings are used. These names are specifically used for the petals of the sweet pea as sweet pea is a flowering plant.

Answer 2

structure of sweet pea flower. ...at the top, called the banner, or standard, that develops outside of the others before the flower has opened, two lateral petals called wings, and two lower petals that are usually fused and form a keel that encloses the stamens and pistil.