purple coneflower

Definition / meaning of purple coneflower

An herb native to North America that has been used to prevent and treat the common cold and other respiratory infections. Purple coneflower may interfere with treatment that uses the immune system to fight cancer. The scientific names are Echinacea purpurea and Echinacea angustifolia. Also called echinacea.

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The Web site of the National Cancer Institute (http://www.cancer.gov/)

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