Allergenic plants are those with pollen that may trigger allergies in susceptible persons or cause allergenic contact dermatitis. Pollen-producing plants are those in the Superdivision Spermatophyta (Seed Plants), which includes both flowering plants and non-flowering, cone-bearing plants.

Note: Although all of these plants can potentially cause allergies in some individuals, not everyone is affected by them, which is a very good thing given how common and widespread some of these plants are here in southeastern Arizona.

Listed below are some of the allergenic plants found in southeastern Arizona.