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Sium sisarum (skirret, crummock) is a perennial plant of the family Apiaceae sometimes grown as a root vegetable. It has a cluster of sweet, bright white roots which are similar to sweet potatoes, but longer (15-20 cm). Skirrets may be boiled, stewed, or roasted. The woody core is inedible, and should be removed before cooking because it is difficult to remove after.

Rumex acetosella is a species of sorrel, bearing the common names sheep's sorrel, red sorrel, sour weed, and field sorrel. There are several uses of sheep sorrel in the preparation of food including a garnish, a tart flavoring agent, a salad green, and a curdling agent for cheese. The leaves have a lemony, tangy or nicely tart flavor.

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Crambe maritima (common name sea kale, seakale or crambe) is a species of halophytic flowering plant of the family Brassicaceae, that grows wild along the coasts of Europe, from the North Atlantic to the Black Sea. The plant is cultivated both as an ornamental plant and as a vegetable, related to the cabbage.