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Canary Grass (Phalaris)

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Canary Grass Genus Details

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Perennial or reed canary grass (Phalaris arundinacea), is native to North America and used as a forage crop, pasture and hay crop. It grows 2-6 feet tall with narrow leaf blades 3-16 inches long. The dense flower head spreads out with components up to 2 inches long. An annual species (P. canariensis) is native to Europe and a source of bird seed. It has narrow leaf blades up to 6 inches long and flowering spikes 1.5 inches long. Mediterranean canary grass (P. minor) is an annual. It grows to 1.5 to 2.5 feet tall and flowers in August in California.

Canary Grass Allergy Info

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Reed canary grass flowers from June to August and is suspected of causing pollinosis in Minnesota. Phalaris species are considered to be the most serious allergenic pollen source in southern California. Phalaris minor sheds sparce pollen and is thought to have little allergenic importance.

Canary 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. 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) 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
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
Canary Grass (Phalaris) is a genus of the POACEAE family.
This genus includes the following allergenic species:

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Canary 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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