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Bluestem (Andropogon)

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Home « Indiana « Lawrence « Andropogon

Bluestem Genus Details

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Broom sedge is a tall reddish bunch of perennial grass that has panicles (flowering structures) which wave like red flags in the wind. The grass sheaths are smooth. Hairs extending from the grass are long and silky. Broom sedge is a high pollen producer and most pollen is shed from June to July. One generally can find broom sedge in fields, pastures and waste areas. It can get to 3-5 feet tall. Andropogon means "bearded like an old man."
Big Bluestem (Andropogon gerardii).
Big Bluestem (Andropogon gerardii).
Big Bluestem (Andropogon gerardii).
Big Bluestem (Andropogon gerardii).

Bluestem Allergy Info

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The grass family in general is considered significant allergenically.

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

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Bluestem 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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