Brassica oleracea
The acephala group refers to any type of "Brassica" which grows without the central 'head' typical of many varieties of cabbage. These are included within the species "Brassica oleracea", such as Kale (Brassica oleracea var. acephala). The name literally means "without a head" in contrast to those varieties known as "capitata" or "with a head". This group includes a number of species, both wild and cultivated, many of which are grown for their edible leaves and flowers.