Sandra Carol Miller & He-ci Yu 
Echinacea [PDF ebook] 
The genus Echinacea

Proving in-depth analysis of a popular herbal remedy, this book brings Echinacea out of the realm of folklore medicine and into the territory of valued and potentially fundamental therapy. As a successful stimulant to the immune system, the herbal remedy has gained acclaim in the fight against many diseases, including cancer. The text describes how the plant is cultivated and where in the world it is most abundant. It describes different species of Echinacea that are medically important and what chemically active ingredients give Echinacea its strong pharmaceutical value. Readers will also learn when this trendy remedy should not be used.