23.If the margins of sepals or petals overlap one another but not in any particular direction, the aestivation is called- A. Valvate B. Vexillary C. Twisted D. Imbricate
Option D. Imbricate Aestivation is the arrangement of accessory floral organs (sepals or petals) in relation to one another in floral bud. It may be of valvate, twisted, vexillary or imbricate type. In imbricate aestivation, there is an irregular overlapping of petals and sepals by one another.
