Berberis microphylla is a small to medium-sized evergreen shrub that is native to South America. It typically grows up to 6 feet (1.8 meters) tall and 6 feet (1.8 meters) wide. The plant has small, glossy, dark green leaves that are oval or spatula-shaped, and small yellow flowers that bloom in late spring or early summer. The flowers are followed by small, bright red berries that are edible but sour.