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Six-Weeks Grass (Vulpia)

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Six-Weeks Grass Genus Details

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Six weeks grass, also called six weeks fescue (Festuca octoflora) is single-stemmed or tufted annual grass 2 to 16 inches tall. This grass appears to also be included in the Festuca genus. It is found in prairies, pastures and waste areas throughout the U.S. Spikelet flowers occur in narrow or open panicles from April to June depending on the latitude.

Six-Weeks Grass Allergy Info

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No specific report has been found for the allergenicity of this grass. The genus Festuca has species with moderate to severe pollen allergenicity.

Six-Weeks Grass 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. Pocaceae 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
Six-Weeks Grass (Vulpia) is a genus of the POACEAE family.
This genus includes the following allergenic species:

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Six-Weeks Grass 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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