Botany - Morphology of Flowering Plants Question with Solution | TestHub

In vexillary aestivation the largest posterior petal is called as standard or vexillum, two lateral petals are called wings and the two anterior smallest petals which are fused are known as keel. Vexillary aestivation thus shows a$1+2+\left(\mathrm{2}\right)$arrangement of petals.