Question

Pea and bean flowers exhibit

• A. valvate aestivation
• B. papilionaceous aestivation
• C. twisted aestivation
• D. imbricate aestivation

Answer 1

The correct option is B papilionaceous aestivation

Aestivation is the arrangement of sepals and petals in a flower bud.

Vexillary or Papillionaceous aestivation is typical of the legume family. Such flowers have one large standard petal on the outerside of all other perals. Next it has two wing petals with one of their margins in and the other out. Then there are two keel petals that are completely on the inner side.

Flowers exhibiting valvate aestivation has margins of the sepals or petals next to each other without overlapping.

Flowers with twisted aestivation shows regular overlapping with one margin in and the other margin out.

Flowers with imbricate aestivation shows irregular overlapping with one petal or sepal completely in, one completely out and the other three in and out.