American Hornbeam pollen allergy: Symptoms, Treatment, Immunotherapy, Tips to avoid

American Hornbeam, scientifically known as Carpinus caroliniana, produces pollen predominantly in the spring season. In many parts of the U.S, their flowering period typically starts in April and extends through June. However, given the diverse climate zones across the country, this period may vary slightly. The timing of the pollen production is largely influenced by the onset of the warmer temperatures, as these deciduous trees respond to the temperature increase by unveiling their flowers. The trees themselves are monoecious, meaning each tree has both male and female flowers. The male flowers, also known as catkins, are responsible for pollen production. As the trees bloom, the catkins, looking like slender, green dangling caterpillars, shed copious amounts of yellowish-green pollen into the air. The wind then carries this pollen, aiding in the tree's propagation by dusting the female flowers, but also contributing to seasonal allergies for some people. In fact, American Hornbeam ranks moderate for pollen allergenicity. Therefore, its pollen is known to cause allergic reactions in people sensitive to it. Those affected may experience symptoms like runny nose, itchy eyes, sneezing, and nasal congestion during the tree's flowering season.