Cauliflower is one of several vegetables in the species Brassica oleracea in the genus Brassica, which is in the Brassicaceae family. It is an annual plant that reproduces by seed. Typically, only the head is eaten – the edible white flesh sometimes called “curd”.

Widely distributed over the eastern two thirds of central North America, American plum grows in prairies, woodlands, pastures, and along roadsides and riverbanks. The shrub is winter-hardy, but intolerant of shade and drought; it requires the equivalent of 22 to 25 inches of precipitation.

Cabbage is a leafy green, red, 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.