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Clover (Trifolium)

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Home « Maryland « Queen anne's « Trifolium

Clover Genus Details

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Many people recognize clover as a 1-3 inch plant growing amongst their otherwise well-manicured lawns. Clover is primarily insect-pollinated. The pollen-bearing structures (stamens) are concealed in the fold of the lower petal, and are not exposed except by the action of an insect. Usually consisting of three tear-drop-shaped leaves, an occasional four-leafed clover will appear, and is said to bring about good luck in legends. Clovers are common icons used to represent anything Irish (at least in the U.S. popular culture).
Clover (trifolium genus)
Clover (trifolium genus)

Clover Allergy Info

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Despite the low amount of pollen shed, several species have been suspected of causing allergy problems.

Clover Pollen Description

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Trifolium grains are prolate to subprolate; the amb triangular, rounded-triangular or with convex sides. The grains are reticulate.
Pollen grains are small (25-28 X 18-20 micrometers).
Trifolium pratense, single grain. Herb. MIN
Trifolium pratense, single grain. Herb. MIN
Trifolium pratense, multiple grains. Herb. MIN
Trifolium pratense, multiple grains. 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
Clover (Trifolium) is a genus of the FABACEAE family.
This genus includes the following allergenic species:

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Clover 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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