Collard greens is the American English term for various loose leafed cultivars of Brassica
Collard greens is the American English term for various loose-leafed cultivars of Brassica oleracea, part of the Acephala group which also contains cabbage and broccoli.
The plants are grown for their large, dark-colored, edible leaves and as a garden ornamental, mainly in Brazil, Portugal, the southern United States, many parts of Africa, Montenegro, Bosnia and Herzegovina, southern Croatia, northern Spain and in India. They are classified in the same cultivar group as kale and spring greens, to which they are genetically similar. The name "collard" is a corrupted form of the word "colewort" .
The plant is also called couve in Brazil and in Portugal, couve galega or couve portuguesa in Cape Verde, berza in Spanish-speaking countries, verza in Italian, raštika in Bosnia and Herzegovina and Croatia and raštan in Montenegro and Serbia. In Kashmir, it is called haak. In Kenya it is more commonly known by its Swahili name, sukuma wiki.