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False Willow (Baccharis)

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Home « Colorado « Bent « Baccharis

False Willow Genus Details

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These shrubs, and sometimes small trees, grow to be 2-3 feet tall, with yellowish flowers. The leaves are narrow. They tend to grow in brackish marshes, in ditches and roadsides, wooded areas, or old fields.
Saltwater False Willow (Baccharis angustifolia).
Saltwater False Willow (Baccharis angustifolia).
Silverling (Baccharis glomeruliflora).
Silverling (Baccharis glomeruliflora).

False Willow Allergy Info

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Since this genus is within the same tribe as ragweed, and plants are both insect- as well as wind-pollinated, allergenicity is a potential concern.

False Willow Pollen Description

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Baccharis pollen grains are oblate-spheroidal to prolate-spheroidal; the amb triangular, 3-4 lobate and 3-4 colporate. The sexine is generally thick, tectate, and has long spines. The intine is thin but slightly thickened below the apertures.
The grains are typically 20-30 micrometers in diameter.
Baccharis halimifolia, single grain. Herb. MIN
Baccharis halimifolia, single grain. Herb. MIN
Baccharis halimifolia, multiple grains. Herb. MIN
Baccharis halimifolia, 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
False Willow (Baccharis) is a genus of the ASTERACEAE family.
This genus includes the following allergenic species:

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False Willow 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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