Douglas-Fir (Pseudotsuga)
Douglas-Fir Genus Details
Douglas firs have flat, linear needles with blunt to pointed tips. Two douglas fir tree species are native to the western North American states. In the moist Pacific Coast region, Douglas firs can grow to 200' tall with the trunk being 8' in diameter. Douglas firs are an important timber tree.
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Douglas-Fir Allergy Info
Members of the pine family pollinate profusely, contributing large numbers to pollen counts. However, they are rarely considered a particularly allergenic plant.
Douglas-Fir Pollen Description
Pine grains are large due to their sacs or bladders, which make them one of the easiest pollen grains to identify. These sacs also allow them to be carried great distances by the wind. Among winged grains, the body is subspheroidal to broadly ellipsoidal. The bladders are generally reticulate or occasionally smooth.
Pollen grains vary in size from 40-85 micrometers.
Species in This Genus
Allergenicity Legend:
Mild Allergen |
Moderate Allergen |
Severe Allergen |
Allergy Test Available
Mild Allergen |
Moderate Allergen |
Severe Allergen |
Allergy Test Available
Douglas-Fir (Pseudotsuga) is a genus of the PINACEAE family.
This genus includes the following allergenic species:
This genus includes the following allergenic species:
