Study of the movement of biological particles (such as spores and pollen) in the atmosphere.

Male reproductive structure in seed plants.

Reproductive structures of certain plants and fungi (including molds and mushrooms).

Path of a pollen cloud carried along the prevailing winds.

An adverse immune system response to harmless substances in the environment, such as mold spores, pollen, dust, and animal dander.

Inflammation of the mucous membranes of the nose due to an allergic response; also known as seasonal allergic rhinitis.

A chronic, inflammatory lung disease that is characterized by recurrent breathing problems and often triggered by allergens, such as spores or pollen.