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Plant Allergy Overview
Allergenicity
Low
Pollen Season
Full Year
Type
Weed
Sub-Type
Annual
Allergy Information
Mild allergenicity is reported on sunflower. However, it is related to the notorious ragweed and cross-reactivity could occur.
Genus Details
Helianthus is native to North America. Long cultivated by Native Americans for its edible seeds, it's now valued by gardeners for its colorful flower head and ability to attract birds. Leaves are generally alternate and have coarse, toothed margins. The terminal flower heads range from 3-12 inches in diameter with yellow ray flowers and tubular disc flowers which can be yellow, brown or purple. Sunflower can range from 2-8 feet tall.
Pollen Description
Genus Distribution
The shaded areas on the map indicates where the genus has been observed in the United States.
- Native, observed in a county - Introduced, observed in a county - Rarely observedSpecies in Sunflower Genus
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