Question

A papilionaceous corolla has

• A. valvate aestivation
• B. twisted aestivation
• C. descendingly imbricate aestivation
• D. ascendingly imbricate aestivation

Answer 1

The correct option is C

descendingly imbricate aestivation

Papilionaceous flowers (from Latin: papilion, a butterfly) are flowers with the characteristic irregular and butterfly-like corolla found in many, though not all, plants of the Fabaceae family. A papilionaceous corolla has imbricate aestivation. The largest (standard) overlaps the two lateral petals (wings) which in turn overlap the two smallest anterior petals (keel).