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Brassica
Brassica rapa
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Brassicales Family: Brassicaceae Genus: Brassica
Species
See text.

Brassica is a genus of plants in the mustard family (Brassicaceae). The members of the genus may be collectively known either as cabbages, or as mustards.

This genus is remarkable for containing more important agricultural and horticultural crops than any other genus. It also includes a number of weeds, both wild taxa and escapees from cultivation. It includes over 30 wild species and hybrids, and numerous additional cultivars and hybrids of cultivated origin. Most are annuals or biennials, but some are small shrubs.

The genus is native in the wild in western Europe, the Mediterranean and temperate regions of Asia. In addition to the cultivated species, which are grown worldwide, many of the wild species grow as weeds, especially in North America, South America, and Australia.

Almost all parts of some species or other have been developed for food, including the root (swedes, turnips), stems (kohlrabi), leaves (cabbage, brussels sprouts), flowers (cauliflower, broccoli), and seeds (many, including mustard seed, oilseed rape (known as "canola" in North America)). Some forms with white or purple foliage or flowerheads, are also sometimes grown for ornament.

Brassica species are sometimes used as food plants by the larvae of a number of Lepidoptera species - see List of Lepidoptera which feed on Brassicas.

Due to their agricultural importance, Brassica plants have been the subject of much scientific interest. The close relationship between 6 particularly important species (Brassica carinata, B. juncea, B. oleracea, B. napus, B. nigra and B. rapa) is described by the Triangle of U theory.

There is some disagreement among botanists on the classification and status of Brassica species and subspecies. The following is an abbreviated list, with an emphasis on economically important species.

• B. carinata - Abyssinian Mustard or Abyssinian Cabbage
• B. elongata - Elongated Mustard
• B. fruticulosa - Mediterranean Cabbage
• B. juncea - Indian Mustard, Brown and leaf mustards, Sarepta Mustard.
• B. napus - Oilseed rape, Canola, Rutabaga (Swede Turnip)
• B. narinosa - Broadbeaked Mustard
• B. nigra - Black Mustard
• B. oleracea - Kale, Cabbage, Broccoli, Cauliflower, Kai-lan, Brussels sprouts
• B. perviridis - Tender Green, Mustard Spinach
• B. rapa - Chinese cabbage, Turnip, Rapini, Mustard
• B. rupestris - Brown Mustard
• B. septiceps - Seventop Turnip
• B. tournefortii - Asian Mustard

• B. kaber (Wild Mustard or Charlock) - see Sinapis arvensis
• B. alba or B. hirta (White or Yellow mustard) - see Sinapis alba

• Cruciferous vegetables for more edible plants of the Brassicaceae family.