Belgian endive, also known as witloof chicory is a member of the daisy family.
From the al.com
For my main course, I chose a cheese souffle, made with delightfully smelly gorgonzola and served with witloof.
From the nzherald.co.nz
More examples
Endive: widely cultivated herb with leaves valued as salad green; either curly serrated leaves or broad flat ones that are usually blanched
Belgian endive: young broad-leaved endive plant deprived of light to form a narrow whitish head
Common chicory, Cichorium intybus, is a bushy perennial herbaceous plant with blue, lavender, or occasionally white flowers. Various varieties are cultivated for salad leaves, chicons (blanched buds), or for roots (var. ...