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Wood-Oats (Chasmanthium)

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Home « Georgia « Ben hill « Chasmanthium

Wood-Oats Genus Details

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This perennial grass can reach approximately 5 feet in height. Often, at half that height the stems tend to arch. The leaves can reach 8 inches in length. The flowers are irregular in shape. Green blooms first appear in late spring and turn brown in early fall. This grass prefers moist, shaded areas and is tolerant of other habitats.
Indian Wood-Oats (Chasmanthium latifolium).
Indian Wood-Oats (Chasmanthium latifolium).

Wood-Oats Allergy Info

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Although found in most parts of the U.S., it is not common enough to shed abundant pollen, except in the southeast and southcentral regions, where it may cause slight summer pollinosis.

Wood-Oats 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
Wood-Oats (Chasmanthium) is a genus of the POACEAE family.
This genus includes the following allergenic species:

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Wood-Oats 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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