brassica-oleracea broccoflower broccoli-cauliflower-cross cauliflower cauliflower-cultivar cross-pollination cruciferous cultivar edible flavor flavour food fresh green green-cauliflower green-headed inflorescence inflorescence-meristems mild nutritious plants raw sweet texture uncooked vegetable vegetables white-cauliflower brassica oleracea broccoli broccoli-cauliflower cross cauliflower cultivar curd color curd colour green cauliflower inflorescence meristems milder sweeter white cauliflower