Horizontal underground plant stem. It is a perennating organ in some species, where it is generally thick and fleshy, while in other species it is mainly a means of vegetative reproduction, and is therefore long and slender, with buds all along it that send up new plants. The potato is a rhizome that has two distinct parts, the tuber being the swollen end of a long, cordlike rhizome.
The points of the star represent the first seven verses of the Koran. Red, black, white, and green became the pan-Arab colours. Effective date: 16 April 1928.