Which group of flowering plants typically has floral parts that are divisible by 3?

The group of flowering plants known as monocots typically has floral parts that are divisible by 3. This characteristic is one of the distinguishing features of monocots, which include plants like lilies, orchids, and grasses. In monocots, floral structures such as petals and sepals usually appear in multiples of three, leading to a floral formula that reflects this pattern.

In contrast, dicots, another major group of flowering plants, are characterized by having floral parts that are usually arranged in multiples of four or five. Gymnosperms, which are non-flowering plants like conifers, do not exhibit this floral division at all, as they reproduce with cones rather than flowers. Angiosperms encompass both monocots and dicots, so they are not specific to any one division of floral parts. Therefore, the distinctive trait of floral parts in multiples of three is a clear marker of monocots.