ROSEMARY LAVENDER PRICE:$24.00 SIZE:8 oz DESIRED EFFECT:TONIFYING-DETOXIFYING The essential oil, which has a strong piercing herbal aroma, has a warm stimulating effect on the central nervous system and the brain. Rosemary has long had the reputation for improving memory and "clearing the head." It is valuable for respiratory problems and a tonic for the heart and gallbladder.