Question

Find out the correctly matched pairs as to aestivation of petals: (i) Valvate-Calotropis, (ii) Twisted-Bean (iii) Imbricate - Cassia (iv) Vexillary-China Rose.

• A. ii and iv
• B. i and ii
• C. i and iii
• D. iii and iv
• E. ii and iii

Answer 1

The correct option is C i and iii

The arrangement of the petals and sepals in a flower is called its aestivation.

(i) Calotropis shows valvate aestivation, the petals are arranged close to each other but do not overlap each other.

(ii) Beans show vexillary imbricate aestivation because of the papilionaceous corolla.

(iii) Cassia shows the imbricate aestivation, the petals are irregularly overlapped.

(iv) China rose shows the twisted aestivated, the petals are regularly overlapped by the next one and overlapping the previous one.

Hence, the correct answer is 'i and iii'