Solanum quitoense, known as naranjilla in Ecuador and as lulo ([ˈlulo], from Quechua) in Colombia, is a subtropicalperennial plant from northwestern South America. The scientific name means "nightshade from Quito" as evidenced by the scientific name, it is a member of the Nightshade family.
The naranjilla plant is attractive, with large heart-shaped leaves up to 45 cm in length. The leaves and stems of the plant are covered in short purple hairs. Naranjilla are delicate plants and must be protected from strong winds and direct sunlight. They grow best in partial shade. Its USDA/NRCSsymbol is SOQU.
The fruit has a citrus flavour, sometimes described as a combination of rhubarb and lime. The juice of the naranjillas is green and is often used as a drink. The naranjilla fruit is harvested when fully ripe to avoid the fruit becoming sour.