Rosemary (Salvia rosmarinus, formerly Rosmarinus officinalis) is a fragrant evergreen shrub native to the Mediterranean region.
 
Here's a breakdown of key information about rosemary:
1. Characteristics:
Appearance: It has needle-like leaves that are dark green on top and silvery-white underneath.
Fragrance: Rosemary has a distinctive piney, resinous aroma.
Flowers: It produces small blue, pink, purple, or white flowers, typically in late spring or early summer.
Growth Habit: Rosemary comes in both upright (shrub) and trailing (prostrate) forms.
Hardiness: It's a perennial in warmer climates (zones 8 and above) but is often treated as an annual or brought indoors in colder regions. 
2. Uses:
Culinary: Rosemary is a popular culinary herb used fresh or dried to flavor a variety of dishes, including:
Meats: Lamb, chicken, pork, beef.
Vegetables: Potatoes, tomatoes, onions.
Soups, stews, sauces.
Breads and baked goods.
Medicinal: Traditionally, rosemary has been used for its potential health benefits, including:
Improving memory and concentration.
Boosting the immune system.
Reducing muscle pain.
Supporting hair growth.
Aromatic: Rosemary is also used in aromatherapy, potpourri, and for its fragrant properties in gardens.
Symbolism: It has been used as a symbol of remembrance, particularly in Europe and Australia. 
3. Growing Rosemary:
Sunlight: Rosemary thrives in full sun.
Soil: It prefers well-drained soil.
Watering: Water regularly but avoid overwatering.
Propagation: Rosemary can be propagated from seeds or cuttings. 
4. Key Compounds:
Carnosic Acid: An antioxidant that may protect against brain damage.
Rosmarinic Acid: A compound with potential anti-inflammatory and antioxidant properties.