HollisterStier Allergy Product Catalog

COMMON COTTONWOOD Common Cottonwood is one of the greatest causes of allergy in the US. In Oklahoma and Colorado, for example, 20% of allergy symptoms can be attributed to Cottonwood trees. 1 Common Cottonwood is prevalent from the northeast to the southeast United States extending into the Great Plains and north into Canada. Three related cottonwoods dominate the western United States. The dominating Cottonwoods in North America are Common P. deltoides , Black P. trichocarpa , and Arizona P. fremontii . Common Cottonwood is cross-reactive with aspen, poplars, and other cottonwoods.

1 Weber RW. Aeroallergen botany. Ann Allergy Asthma Immunol . 2014 Feb;112 (2):102 7. doi:10.1016/j.anai.2013.12.009. PMID: 24468248.



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