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Creosote-Bush Greasewood (Larrea)

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Creosote-Bush Greasewood Genus Details

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The creosote bush is an evergreen balsam-scented shrub that grows to 10 feet tall in dry soils. Some say this shrub has a creosote odor. The small leaves reach 1/3 inch long, and are opposite, fleshy or leathery, spine-like, and resinous. The yellow flowers usually reach 1/4 inch long. Flowering occurs during February to August in the south central U.S. and from March to May in the southwestern U.S. The creosote bush is insect-pollinated but the pollen may become airborne.

Creosote-Bush Greasewood Allergy Info

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Reports in studies have shown this to be potentially allergenic, specifically in California.

Creosote-Bush Greasewood Pollen Description

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Grains are prolate to prolate-spheroidal. The amb is triangular with convex sides and 3-colporate.
Pollen grains are generally 28-30 micrometers in diameter.

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
Creosote-Bush Greasewood (Larrea) is a genus of the ZYGOPHYLLACEAE family.
This genus includes the following allergenic species:

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Creosote-Bush Greasewood 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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