Rye Grass (Lolium)
Rye Grass Genus Details
The rye grass genus has short-lived perennial, biennial, and single-stemmed annual species. This grass is widely used in lawns, pastures as a forage, roadsides and waste areas. Perennial types grow in tufts or mats. Flat or slightly rolled (inward) leaf blades have a smooth surface and grow 1-10 inches long. Flowers are located on stalks 2-6 inches tall. Flowering occurs in June-August. The majority of the pollen comes from the grass found in patures, hay fields and wild areas, since the plants must usually be more than 1 foot tall to flower.
Rye Grass Allergy Info
This is one of the more significant grass types in terms of allergy. Abundant pollen shed can cause severe pollinosis problems in all regions of the U.S.
Rye Grass Pollen Description
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.
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This plant belongs to the grass family. All pollen grains in this family are similar to the Poaceae (grass) grain pictured here. Herb. MIN
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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
Allergenicity Legend:
Mild Allergen |
Moderate Allergen |
Severe Allergen |
Allergy Test Available
Mild Allergen |
Moderate Allergen |
Severe Allergen |
Allergy Test Available
Rye Grass (Lolium) is a genus of the POACEAE family.
This genus includes the following allergenic species:
This genus includes the following allergenic species:
