( lat. Olea )

Kingdom: Plantae
Order: Scrophulariales
Family: Oleaceae
Genus: Olea

Plant Allergy Overview



Pollen Season

Spring Summer





Allergy Information

Where the tree is present, reactions to olive pollen are common, and typically severe.

Genus Details

The leaves of olive trees are opposite and usually evergreen in the southern parts of the United States. The tree is small (up to 25 feet) and spreading. The flowers appear in the spring and are white, small and fragrant.

Pollen Description

Pollen grains are prolate, suboblate to spheroidal and 3-colpate. The surface is reticulate and the exine is thick.

Pollen grains vary in size from 22-28 micrometers.

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 observed

Species in Olive Genus

Allergens & Plants Search

Enter a full or partial species name to find more information on one of over 1,200 potentially allergenic plants.
For example, you can find chenopods searching on "cheno"