Berberis darwinii, Darwin's barberry,[3] is a species of flowering plant in the family Berberidaceae,[4] native to southern Chile and Argentina and naturalized elsewhere.

The fruit is a small purple-black berry 4–7 mm diameter, ripening in summer.

Berberis darwinii was discovered in South America in 1835 by Charles Darwin during the voyage of the Beagle.

[6] The berries of this species are known to have been consumed by prehistoric native peoples[7] in the Patagonian region over millennia.

[9] It is considered a serious threat to indigenous ecosystems throughout New Zealand[10] and is listed on the National Pest Plant Accord.