What is trimerous flowers? Which group of plants has trimerous flowers?

Trimerous Flowers

1. The flowers with floral appendages (calyx, corolla, or perianth) that are present in three or multiples of three are known as trimerous flowers.
2. Examples of trimerous flowers include flowers of maize, wheat, and rice.

Group of plants that has trimerous flowers:

It is found in a majority of monocotyledonous plants.