Cabbage
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Cabbage, comprising several cultivars of Brassica oleracea, is a leafy green, red (purple), or white biennial plant grown as an annual vegetable crop for its dense-leaved heads. It is descended from the wild cabbage, and belongs to the "cole crops" or brassicas, meaning it is closely related to broccoli and cauliflower ; Brussels sprouts ; and Savoy cabbage.
A savoy cabbage and a cross section
The cabbage inflorescence, which appears in the plant's second year of growth, features white or yellow flowers, each with four perpendicularly arranged petals.
Cabbage
Harvesting cabbage, Tacuinum Sanitatis, 15th century
Cauliflower
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Cauliflower is one of several vegetables cultivated from the species Brassica oleracea in the genus Brassica, which is in the Brassicaceae family.
Cauliflower, cultivar unknown
Cauliflower plants growing in a nursery
White and green cauliflower
Green Romanesco cauliflower