Stevia (Stevia rebaudiana) is a perennial herb native to South America, prized for its sweet-tasting leaves which contain steviol glycosides, natural compounds that are much sweeter than sugar but with zero calories. It's commonly used as a sugar substitute and is also known for potential health benefits, particularly for those managing diabetes. 

Key details about the Stevia plant:

Botanical Classification: Stevia rebaudiana belongs to the Asteraceae (sunflower) family. 

Native Region: Primarily found in the highlands of Paraguay and Brazil. 

Sweet Compounds: The leaves contain stevioside and rebaudioside A, among other steviol glycosides, which are responsible for the sweet taste. 

Calorie-Free Sweetness: These glycosides are not metabolized by the body for energy, making them calorie-free. 

Cultivation: Stevia can be grown in well-drained soil and prefers warm, moist, and sunny conditions. 

Uses: Used as a natural sweetener in various food and beverage products, and also as a dietary supplement. 

Potential Health Benefits: Stevia is often used to manage blood sugar levels, weight control, and may have antioxidant and anti-inflammatory properties.