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Plumeless-Thistle (Carduus)

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Home « Louisiana « Natchitoches « Carduus

Plumeless-Thistle Genus Details

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This thistle is usually a winter annual or biennial herb that rarely flowers its first year. Its stem is erect, usually branched with spiny wings. It will usually grow to 9-10 feet tall. This thistle is native to Europe but spread rapidly through the U.S. and Canada when introduced. It can be found in waste areas that have chalky or limestone soils. The down of this plant has been used as material in making paper.
Plumeless-Thistle (Carduus acanthoides)
Plumeless-Thistle (Carduus acanthoides)

Plumeless-Thistle Allergy Info

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This genus is usually considered only a minor cause of allergic reactions.

Plumeless-Thistle Pollen Description

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No pollen description is currently available.

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
Plumeless-Thistle (Carduus) is a genus of the ASTERACEAE family.
This genus includes the following allergenic species:

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Plumeless-Thistle 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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