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Luma chequen is a species of flowering plant in the genus Luma in the family Myrtaceae, native to the central Andes mountains between Chile and Argentina. Synonyms include Eugenia chequen Molina, Myrtus chequen (Molina) Spreng., and Luma gayana (Barn.) Burret. Common names include Chequén, Huillipeta, and Arrayán Blanco.
It is a shrub (rarely a small tree) growing to 9 m tall, with dull grey-brown bark (unlike the smooth red bark of the related Luma apiculata). It is evergreen, with small fragrant oval leaves 0.5-2.5 cm long and 0.3-1.5 cm broad, and white flowers in early to mid summer. Its fruit is an edible dark purple berry 1 cm in diameter, ripe in early autumn.