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Koeler's Grass (Koeleria)

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Home « California « Butte « Koeleria

Koeler's Grass Genus Details

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This perennial grass is also called hairgrass, or western June grass. It is an important forage or pasture grass in the western U.S. It grows in prairies, open woods and sandy soils throughout the U.S. , except in some southeastern states. Slender plants are low to moderately tall (1-2 feet tall) with narrow leaves (1- 7 inches long), and glossy spike-like panicles or flowering stalks.

Koeler's Grass Allergy Info

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Flowering with significant pollen shed occurs during July to September and causes pollinosis in these states.

Koeler's 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
Koeler's Grass (Koeleria) is a genus of the POACEAE family.
This genus includes the following allergenic species:

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Koeler's 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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