Water chestnut

The Chinese water chestnut, more often called simply the water chestnut, is a grass-like sedge grown for its edible corms. It has tube-shaped, leafless green stems that grow to about 1.5 metres. The Chinese water chestnut is native to China and is widely cultivated in flooded paddy fields in southern China and parts of the Philippines. The small, rounded corms have a crispy white flesh and can be eaten raw, slightly boiled, grilled, pickled, or tinned. They are a popular ingredient in Chinese dishes. In China, they are most often eaten raw, sometimes sweetened. They can also be ground into a flour form used for making water chestnut cake. They are unusual among vegetables for remaining crisp even after being cooked or canned.

Globe Artichoke

Globe Artichokes are most frequently prepared for cooking by removing all but 5–10 mm or so of the stem, and (optionally) cutting away about a quarter of each scale with scissors. This removes the thorns that can interfere with handling the leaves when eating. Then, the artichoke is boiled or steamed until tender. If boiling, salt can be added to the water, if desired. It may be preferable not to cover the pot while the artichokes are boiled, so that the acids will boil out into the air. Leaves are often removed and eaten one at a time, sometimes dipped in vinegar, butter, mayonnaise, aioli, lemon juice or other sauces.

Polk or American Pokeweed

Parts of the plant in different stages, can be used as food. The leaves of young plants are sometimes collected as a spring green potherb and eaten after repeated blanchings. Shoots are also blanched with several changes of water and eaten as a substitute for asparagus. They become cathartic as they advance to maturity. The cooked greens are sold commercially in the Southern states of North America, but any food use of the plant is controversial because of toxins in the plant.

Yam

Yams are a primary agricultural commodity in West Africa and New Guinea. They were first cultivated in Africa and Asia about 8000 B.C. Due to their abundance and consequently, their importance to survival, the yam was highly regarded in Nigerian ceremonial culture and even worshiped. Yams are still important for survival in these regions. The tubers can be stored up to six months without refrigeration, which makes them a valuable resource for the yearly period of food scarcity at the beginning of the wet season. Yams of African species must be cooked to be safely eaten, because various natural substances in raw yams can cause illness if consumed.

Water Convolvulus, Chinese Water Spinach, Swamp Cabbage, Kang Kong,

Practically all parts of the young plant tissue are edible although the shoot tips and younger leaves are preferred. Coarse stems and leaves are often used for animal feeding. The tender shoot tips and leaves are eaten fresh or lightly cooked as with spinach. Cooking in oil is common, the addition of spices enhances the relatively bland flavour. These plant greens provide the nutritional benefits of most green leafy vegetables.