1. In botany, the tissue or group of cells in a plant's anther or ovule from which spores or gametes develop; the sporogenous tissue.
Usage: technical; botany; plural: archesporia or archesporium

Examples

• The archesporia in the anther gives rise to pollen grains.
• Botanists study the archesporia to understand how spores form in plants.
• The development of archesporia is critical to plant reproduction.
• Under the microscope, the archesporia appears as a distinct tissue layer.