The maples occur almost everywhere. From east to west and north to south the species vary and so does the potential for causing allergic reactions. Some species of maple are small and grow in mountainous areas and are mostly insect pollinated. This does not allow much opportunity for the pollen to become airborne and travel for very long distances. These species are not considered important allergens. The most potent member of this genus is the Box elder (Acer Negundo). This tree is found in abundance in the western Provinces of Canada, (except British Columbia) as well as in Ontario and Quebec. It is common and abundant in the mid-western states and also some of the eastern states. This species flowers in the southern U.S. in January and February and in the northern parts of the U.S. and Canada in April and May, depending on the province or state. The species has established far beyond its natural range in many parts of North America. Although related to box elder, some of the other species of maple cause fewer allergy problems.
Last Updated: 14 October 2009
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