Organic powdered onion arrives ready-to-use in 4 ounce plastic shaker jars and 16 ounce Wilderness Family Naturals branded vapor-barrier, resealable packaging to maintain freshness. Packaging may include an oxygen absorber. Allium cepa is the common onion, although it is usually thought of as a vegetable. Onions are perennials that are cultivated for food worldwide. There are many varieties. Bulbing onions have cylindrical, hollow leaves and an enlarged bulb that develops at ground level. The green stems and leaves can reach 3 ft (1 m) in height. The roots come off the bottom of the bulb. The flowers are produced in the second growing season (following a required "rest" period) in a rounded umbel (cluster with all flower stems originating from the same point) on a stalk 2-4 ft (0.6-1.2 m) tall. The umbels, about 2 in (5 cm) in diameter and consisting of many small purplish flowers, are quite showy.