Rosemary Leaf Whole, Rosmarinus officinalis Rosemary is an evergreen shrub that has a strong scent. It is native to the Mediterranean region of Europe and grows up to 7 feet tall. The leaves can be removed as necessary. Rosemary is thought to help improve memory function. It's also used as a tonic. Research has shown that rosemary does have anti-inflammatory properties as well as working well as a stimulant. These properties make it great for treating skin conditions and other ailments.