Final answer:
Plants that produce gametes in flowers are known as angiosperms, which include a wide range of plants such as herbs, shrubs, and most trees, and are characterized by having seeds within the ovaries of flowers.
Step-by-step explanation:
Plants which produce their gametes in flowers are called angiosperms. Unlike gymnosperms, which produce seeds in cones, angiosperms produce seeds within the ovaries of flowers. After fertilization, the walls of the ovary thicken and often develop into fruit, aiding in seed dispersal.
Angiosperms include a vast array of plants including grasses, herbs, shrubs, and most deciduous trees. The main parts of a flower are the sepals and petals, which protect the reproductive organs, such as the stamens that produce the male gametes (pollen grains) and the carpels that contain the female gametes (eggs within the ovules).