Locust

( lat. Robinia )

Kingdom: Plantae
Order: Fabales
Family: Fabaceae
Genus: Robinia

Plant Allergy Overview

Allergenicity

Mild

Pollen Season

Spring Summer

Type

Tree

Sub-Type

Deciduous

Allergy Information

Locusts are of questionable allergenic importance. It has been reported to be allergenic only under unusual circumstances. Nectar and fragrance produced during flowering have been mistaken by patients to be producing airborne pollen and pollinosis.


Genus Details

Black locust and other species are native from Pennsylvania to Georgia and westward to Iowa, Missouri and Oklahoma. This tree has been planted and become naturalized in other areas of the U.S. Locust trees reach a height of 80 feet. The leaves have 7 to 19 oval leaflets and fragrant white or pink flowers in drooping clusters that are 4-5 inches long. Its pollination period is from spring to early summer.


Pollen Description

Pollen grains are prolate, subprolate or prolate-spheroidal; the amb triangular or rounded triangular and 3-colporate. The colpi are long and narrow.

The pollen grains are large and vary in size from 36-40 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 Plantain 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"