Herbal Dietary Supplement. Tanacetum parthenium. Leaf & flower. We prepare our feverfew extract from the leaf & flower (no stem) of tanacetum parthenium plants which are certified organically grown on our own farm without the use of chemical fertilizers, pesticides or herbicides. To assure optimal extraction of Feverfew's bioactive compounds, the plants are hand-harvested only while in full-flower, are carefully shade-dried to retain their full color & aroma, and are then thoroughly extracted. Our feverfew is never fumigated or irradiated. Dry herb/menstruum ratio: 1:5. Contains certified organic grain alcohol (66-76%), distilled water & feverfew extractives.