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Beakgrain (Diarrhena)

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Home « Indiana « Perry « Diarrhena

Beakgrain Genus Details

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Diarrhena is found in abundance in rich or moist woods in the eastern to midwest U.S. In the north central region, it blooms from July to September. In the south central region, it blooms June through October. Diarrhena is a perennial with an upright stem. The leaves consist of a sheath and a blade. The ligule is found at the base of the blade and serves to keep rain from entering the sheath.

Beakgrain Allergy Info

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This genus is not commonly cited as a source of allergy.

Beakgrain 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.
Pollen grains from this genus are of the grass-type.  Grains will look similar to the Poaceae (grass) grains pictured. Herb. MIN
Pollen grains from this genus are of the grass-type. Grains will look similar to the Poaceae (grass) grains pictured. 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
Beakgrain (Diarrhena) is a genus of the POACEAE family.
This genus includes the following allergenic species:

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Beakgrain 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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