Mostly found in the Northern Hemisphere, Brome grass starts flowering in May and finishes in September.

Myrica plants are typically shrubs, with most plants not exceeding 10 feet tall.

Alternaria is one of the most important allergenic molds.

The American Elm is a very widespread medium-sized or large tree typically found in floodplains, ravines and other moist areas.

The large trees can produce significant amounts of pollen, pollen which has been classified as a moderately severe allergen.

A. Niger is a common saprophytic (lives off of dead or decaying organic matter) mold.

A pervasive mold that can be found in widely varied habitats like bathrooms and kitchens, deposits such as water and more.

Bahia grass has been studied in many countries and has been documented as a trigger of allergic rhinitis, asthma and allergic conjunctivitis.

Bermuda grass is a significant grass allergen.