Kale (), also called leaf cabbage, belongs to a group of cabbage (Brassica oleracea) cultivars primarily grown for their edible leaves; it has also been used as an ornamental plant. Description. Kale plants have green or purple leaves, and the central leaves do not form a head (as with headed cabbage). The stems can be white or red, and can be tough even when cooked. Etymology. The name kale originates from Northern Middle English cale (compare Scots kail and German Kohl) for various cabbages. The ultimate origin is Latin caulis 'cabbage'. Cultivation.
https://en.wikipedia.org/wiki/Kale