Which of the following options relates to Hibiscus rosa sinensis (Malvaceae)?
a) Valvate aestivation of calyx (Sepals).
b) Stamens form a staminal tube around the style.
c) Placentation is axile.
d) Aestivation is twisted in a corolla.
e) Bracteoles constitute epicalyx.
f) Flower is actinomorphic.

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a,b,c,d and e only

b,c,d,e and f only

a,c,d, e and f only

a,b,c, d, e and f

answer is D.

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Detailed Solution

Calyx of china rose show valvate aestivation. Bracteoles are modified into epicalyx which is a unique feature of Malvaceae. Petals show twisted aestivation. Stamens form staminal tube around the ovary. China rose flowers can be divided into two equal parts by passing along any plane. Hence, they are actinomorphic. Axile placentation is seen.

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