Berberis microphylla, common name box-leaved barberry[2] and Magellan barberry,[3] in Spanish calafate and michay and other names,[4] is an evergreen shrub, with simple, shiny box-like leaves.

The calafate is native to southern Argentina and Chile and is a symbol of Patagonia.

Its edible blue-black berries are harvested for jams, but are eaten fresh too - a legend tells that anyone who eats a calafate berry will be certain to return to Patagonia.

[13] The calafate is grown commercially for its fruit, potential medical uses[3] and as a garden plant or bonsai.

The cultivar Berberis microphylla 'Nana' is widely available as a garden shrub, and is also used in commercial plantings as a low spiny hedge to discourage intruders, but it does not fruit.