The cauliflower, along with several other vegetables, belongs to the species Brassica oleracea of the genus Brassica which is part of the family of Brassicaceae. Broccoli, Brussels sprouts, cabbage, collard greens and kale (collectively called "cole" crops) belong to various cultivars, but are all members of the species Brassica oleracea.
The cauliflower plant is an annual plant that reproduced by seed. The cauliflower head looks like broccoli and consists of white, flowering meristem. Only the cauliflower head is eaten, this white flowering part is at times referred to as ‘curd’.