When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as

Explanation

(b) : Aestivation is the arrangements of accessory floral organs (sepals or petals) in relation to one another in floral bud. Vexillary: Vexillary, also known as descending imbricate, is a type of aestivation in which the largest petal, called the standard, is outside of all the others, and the two lateral petals are inside the standard but outside the two lowest petals, which are called the keel petals. Vexillary aestivation is commonly found in legumes, such as peas and beans. Imbricate: Imbricate aestivation is a type of aestivation in which the margins of the sepals or petals overlap one another without any particular direction. This means that there is no clear pattern to the overlapping, and the margins of the sepals or petals can overlap in any way. Imbricate aestivation is commonly found in flowers such as roses and sunflowers. Twisted: Twisted aestivation is a type of aestivation in which the margins of the sepals or petals twist and fold around each other. This means that the edges of the sepals or petals are not smooth, and they overlap in an irregular way. Twisted aestivation is commonly found in flowers such as hibiscus and cotton. Valvate: Valvate aestivation is a type of aestivation in which the margins of the sepals or petals touch each other without overlapping. This means that the edges of the sepals or petals are smooth, and they meet at a seam. Valvate aestivation is commonly found in flowers such as lilies and tulips. Therefore, the correct answer is imbricate. Imbricate aestivation is the condition in which the margins of sepals or petals overlap one another without any particular direction.