Onions are flowering plants that use insect pollination to produce viable seeds. Different types of bees are the main pollinators of onions. Commercial production of onions usually harvests before flowering, however, and instead exclusively uses daughter bulbs to reproduce cultivated onions.Know More
Onions are bulbs of the Allium genus, which they share with garlic, leeks and chives. Scallions, meanwhile, are actually members of the onion species at different stages of development. Shallots are also members of the same species, but are a different variety.
The bulbs of onions are actually modified leaves wrapped around each other. The outer leaves dry out, creating a tough protection for the moist, living leaves beneath. The green leaves that photosynthesize spring from buds in the center of the bulb. The stem is just a flat disc of tissue at the bottom of the bulb from which the roots branch out.
Onions are the most widely used in their group, with garlic at a distant second place at about 10 percent of the production of onions. The white, yellow and red varieties of onion are just different varieties of the same species. Because of their method of cultivation, the vast majority of onions of any one variety grown today are genetically identical — clones.Learn more about Fruits & Veggies
Onions are grown in the ground; when pulled while they are young, they are known as scallions, but when left to grow until ready to harvest, they are the same white, yellow or red varieties that are found in most supermarkets. All onions start their lives as bulbs, seeds or transplants that are planted in the ground; immature bulbs are also sometimes called onion sets.Full Answer >
Onions are both aromatics and vegetables in their own right, and they have been cultivated by humans since at least 5000 B.C. Besides cooking, onions have been used for paying rent, increasing fertility in both humans and animals, killing insects, curing baldness and treating snakebites.Full Answer >
Cut onions release amino acid sulfoxides, which the eyes perceive as an irritant. The eyes react by flushing the irritant out using reflex tears, a type of tear designed for this purpose.Full Answer >
Eating red onions may help reduce risk of stroke, heart disease and a variety of cancers, including prostate, colorectal and stomach cancers, according to HealWithFood.org and SFGate. For maximum health benefits, retain as much of the fleshy, edible portion of the onion as possible when removing the onion's outermost layer.Full Answer >