Root plant to fuel the process. In return, the plant takes nitrogen compounds produced from ammonia by the bacteria. The term root crops refers to any edible underground plant structure, but many root crops are actually stems, such as potato tubers. Edible roots include cassava, sweet potato, beet, carrot, rutabaga, turnip, parsnip, radish, yam and horseradish. Spices obtained from roots include sassafras, angelica, sarsaparilla and licorice. Sugar beet is an important source of sugar. Yam roots are a source of estrogen compounds used in birth control pills. The fish poison and insecticide rotenone is obtained from roots of "Lonchocarpus" spp. Important
Kiekie (plant) "F. banksii"). The sweet-tasting fruits and the succulent flower bracts (tāwhara) were a delicacy of the Māori. These were often gathered by using a forked stick. The leaves widely for plaiting and weaving, although the broader leaves of New Zealand flax were preferred because they provided more material. Items woven included mats and temporary baskets for holding food. The aerial roots were gathered to use as a binding material for implements and for making fish traps and sandals. Kiekie (plant) Kiekie ("Freycinetia banksii") is a densely branched, brittle, woody climber native to New Zealand. It is a member of the