Baskets can be constructed from almost any material. Most are made from wood, roots, leaves, grass, pine needles, wicker, reed, cane, bamboo, raffia, medulla, or ash. Wicker baskets (made from willow bark) and reed & cane baskets (made from vines) are among the most popular and easiest to produce. Sweetgrass baskets, originally produced by African slaves in and around Charleston, South Carolina, are considered to be one of the few the ramaining forms of African-American folk art.