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Barley (Hordeum)

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Home « Virginia « Appomattox « Hordeum

Barley Genus Details

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Cultivated barley (Hordeum vulgare) is an annual that sheds little pollen since it's self-pollinated. About 7 wild species of barley grow in the U.S. Two species, foxtail barley or squirrel-tail grass (H. jubatum), and mouse barley (H. murinum) are common weeds in the western U.S. Foxtail barley is a perennial that grows in tufts or mats with flat leaves. A spikelike flower or seed head resembles a fox or squirrel tail. Foxtail barley grows throughout the U.S. except in the southern states.
Fox-Tail Barley (Hordeum jubatum).
Fox-Tail Barley (Hordeum jubatum).
Fox-Tail Barley (Hordeum jubatum).
Fox-Tail Barley (Hordeum jubatum).

Barley Allergy Info

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The grass family in general is considered significant allergenically.

Barley Pollen Description

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Grains are spheroidal to ovoidal, sometimes elliptical. The exine is thin and the surface is granular to finely reticuloid. Poaceae apertures are 1-porate, with the pores usually circular to ovoidal.
Grains are 22-122 micrometers in diameter.
This plant belongs to the grass family.  All pollen grains in this family are similar to the Poaceae (grass) grain pictured here. Herb. MIN
This plant belongs to the grass family. All pollen grains in this family are similar to the Poaceae (grass) grain pictured here. Herb. MIN
This plant belongs to the grass family.  All pollen grains in this family are similar to the Poaceae (grass) grains pictured here. Herb. MIN
This plant belongs to the grass family. All pollen grains in this family are similar to the Poaceae (grass) grains pictured here. Herb. MIN

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
Barley (Hordeum) is a genus of the POACEAE family.
This genus includes the following allergenic species:

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Barley 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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