Definition
Mammillaria is a large genus of cacti, known for their distinctive bumpy texture. These bumps, called tubercles, give the plant a unique, almost knitted appearance. They're usually small, globe-shaped, or cylindrical. Unlike many cacti, mammillarias often have hooked spines. Think of them as the porcupines of the cactus world 🌵. They are popular among cactus collectors because of their variety and relatively easy care.