The ancestor of all cultivated cole crops is

The ancestor of all cultivated cole crops is Brassica oleracea var sylvestris.
Broccoli, cabbage, and cauliflower are known as cole crops. Cole crops originated from the word caulis (Latin) meaning stem or stalk of a plant. Today cole crops mean the stem brassicas.
The most primitive B. oleracea, designated subspecies oleracea (B. oleracea var. sylvestris L.; a low, shrubby plant with woody lower parts of stems and herbaceous upper parts) is considered to be the ancestral progenitor of all horticultural types.