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Castor-Bean (Ricinus)

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Castor-Bean Genus Details

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Castor bean is a vigorously growing annual. In the tropics, it can grow to 40' tall, but in North America it usually grows to only 15'. It has large leaves up to 3' across. The plants contain both male and female flowering parts, meaning they produce pollen, and can be pollinated, too. The fruit is 1" long and covered in small spines. Seeds from castor beans plants are poisonous. Castor bean is native to Africa but is now grown in gardens throughout North America. Oil is extracted from the seeds and in herbal medicine, is used as a laxative.

Castor-Bean Allergy Info

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Castor bean pollen has been known to cause allergic reactions and the sap from the plants can cause contact dermatitis.

Castor-Bean Pollen Description

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No pollen description is currently available.

Species in This Genus

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Allergenicity Legend:
Mild Allergen Mild Allergen  |  Moderate Allergen Moderate Allergen  |  Severe Allergen Severe Allergen  |  Allergy Test Allergy Test Available
Castor-Bean (Ricinus) is a genus of the EUPHORBIACEAE family.
This genus includes the following allergenic species:

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Castor-Bean Genus Location

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The shaded areas on the map indicates where the genus has been observed in the United States. Click the map to see a full scale version of these allergy areas.
  - Native, observed in a county
  - Introduced, observed in a county
  - Rarely observed

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