Pollen grains are produced by

In the anatomy of a flower, pollen grains, which contain the male gametes necessary for plant reproduction, are produced within the anther. The anther is a part of the stamen, which constitutes the male reproductive organ of a flower. It typically consists of two lobes, each containing pollen sacs where microspores develop into pollen grains.

• The stigma is the receptive tip of the carpel (female reproductive organ) that receives pollen during pollination.
• The ovary is the basal part of the pistil (female reproductive organ) that contains ovules and develops into the fruit after fertilization.
• A petal is a modified leaf that forms part of the corolla, often brightly colored to attract pollinators, but not involved in pollen production.

Understanding these floral structures is key to comprehending plant reproduction.