Petal arrangement refers to the specific pattern in which petals are organized around the center of a flower. This arrangement can vary widely among different species, influencing the flower's appearance and function. Common patterns include whorled, spiral, and radial arrangements, each serving various purposes in attracting pollinators and facilitating reproduction. The arrangement of petals is often linked to the flower's symmetry, which can be classified as bilateral or radial. Understanding petal arrangement helps botanists and horticulturists identify plant species and their evolutionary relationships, as well as their ecological roles in ecosystems.