The sagebrush and Mugwort are Compositae and can cause allergic reactions. They are widespread across the world. The season is generally from August to late September. There are many species and the most abundant are found in the Prairies and the interior of British Columbia. In large numbers they are considered important in causing allergic reactions. The pollen are not released in very high numbers due to the pollen grain being heavy and is not carried very far. Allergenic importance due to high cross reactivity among species and sensitization does occur.
Last Updated: 14 October 2009
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