Question

Arrangement of sepals/ petals (five in number) of which two are exterior two are interior and the fifth one partially interior and partially exterior is termed as:

• A. Valvate
• B. Imbricate
• C. Contorted
• D. Quinquincial

Answer 1

Answer:

D. Quinquincial

• Quincuncial: This is a specific type of imbricate aestivation where out of the five sepals or petals, two are entirely exterior, two are entirely interior, and the fifth one has one margin exterior and the other interior. This is a common arrangement in the family Malvaceae.

• Valvate: The margins of sepals or petals touch each other without overlapping. An example is the calyx of the custard apple (Annona).

• Imbricate: The sepals or petals overlap each other, but not in a specific direction. The outermost one overlaps the next, and so on. This arrangement is seen in Cassia.

• Contorted (or Twisted): One margin of each sepal or petal overlaps the next one in a regular, spiral manner. This arrangement is found in cotton, lady's finger, and China rose.