Valvate aestivation is found in petals of 

Valvate aestivation is found in petals of Solanaceae. 

Valvate aestivation refers to the arrangement of petals (or sepals) in a flower where the edges of the petals or sepals touch each other but do not overlap. This type of aestivation is typically found in the Solanaceae family.

Key Features of Valvate Aestivation

• The petals or sepals meet at their edges, forming a clear boundary without any overlap.
• This arrangement helps in the protection of the flower's reproductive organs while in bud form.

Why Solanaceae?

The Solanaceae family, commonly known as the nightshade family, includes plants like tomatoes, potatoes, tobacco, and eggplants. These plants generally exhibit valvate aestivation in their flowers. A common example would be the brinjal (eggplant) and tomato, where the petals meet without overlapping at the edges.

Why Not the Other Options?

• Fabaceae: This family typically exhibits papilionaceous (butterfly-like) flowers and does not feature valvate aestivation.
• Malvaceae: The Malvaceae family generally shows twisted aestivation in its flowers, not valvate.
• Liliaceae: Members of the Liliaceae family often show imbricate aestivation rather than valvate.

Conclusion:

Valvate aestivation is a key characteristic of the Solanaceae family, where the petals meet at the edges without overlapping, ensuring protection and facilitating the flower's proper development.