Ginger
Although often called root, Ginger is not a root but the underground stem or rhizome of the plant Zingiber officinale. It has a firm, striated texture and its flesh can be yellow, white, or red, depending upon the variety. It is covered with a brownish skin which is thin when the plant was harvested young, and thick when the plant was harvested mature. In Asian countries, Ginger has been used as a medicine and culinary spice since ancient times. As a medicine it was used to treat conditions like stomach upsets, diarrhea, nausea, arthritis, and heart conditions. Today, Ginger is most widely used to treat nausea and vomiting in pregnancy and motion sickness, but also as a digestive aid, to relieve colds, headaches and painful menstrual periods.