Papilionaceous flower with large vexillum covering two wings and the wings covering the keel has corolla aestivation of

Options

A. Descending imbricate
B. Ascending imbricate
C. Twisted
D. Valvate

Answer

A

Explanation

Descending imbricate or Vexillary is a type of imbricate aestivation in which the anterior petal is internal. The posterior petal is largest and it almost covers the two lateral petals and the later in their turn nearly overlaps the two anterior and smaller petals e.g. plants of family papilionaceae or fabaceae (Pea).