1. The outer envelope of a flower, consisting of the calyx and corolla (sepals and petals).
Usage: botanical term; commonly used in plant biology and botany

Examples

• The perianth of the rose consists of green sepals and pink petals.
• Botanists examine the perianth to classify flowering plants.
• In some flowers, the perianth is brightly colored to attract pollinators.
• The perianth protects the reproductive organs of the flower.
• Different plant species have perianths with distinct shapes and colors.