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Valvate type of aestivation are arrangements of petals in

( A ) If the margins of sepals or petals overlap one another but not in any particular direction
( B ) in a whorl manner
( C ) one margin of the appendage overlaps that of the next one and so on
( D ) None of the above

1 Answer

(B) is the right answer.

The mode of arrangement of sepals or petals in floral bud with respect to the other members of the same whorl is known as aestivation. The main types of aestivation are valvate, twisted, imbricate and vexillary When sepals or petals in a whorl just touch one another at the margin, without overlapping, as in Calotropis, it is said to be vulvate.
answered Apr 4, 2014 by pady_1