Broccoli, also named cauliflower broccoli, belongs to mustard family. It's eatable part was buds and ball-flower.
Broccoli is very nutrition and contains protein, sugar, fats, vitamine, carbonhydrate, that was honored with "number one" among the similarities. It has prominent effect on preventing cancer, because its Vc, which is much higher than tomato, celery, cabbage, especially preventing stomach cancer and breast cancer.