natural remedy Red flower of Bitterwood or Quassia is Thai herb. The properties of the root is to help fever and aid digestion. Stock Free Red flower of Bitterwood or Quassia is Thai herb. The properties of the root is to help fever and aid digestion. Stock Free turmeric and ginger tea with spices on white background Stock Free ginkgo biloba tea with ginkgo biloba root isolated on white background Stock Free homemade spinach juice with green leaves Free Photo