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White onion or Allium cepa (“sweet onion”) are a cultivar of dry onion which have a distinct light and mild flavour profile. Much like red onions, they have a high sugar and low sulphur content, and thus have a relatively short shelf life. [1] White onions are used in a variety of dishes, such as those of Mexican and European origin.
The base of each leaf is a flattened, usually white sheath that grows out of the basal plate of a bulb. From the underside of the plate, a bundle of fibrous roots extends for a short way into the soil. As the onion matures, food reserves accumulate in the leaf bases, and the bulb of the onion swells. [18]
Swamp white oak – Quercus bicolor; Valley oak – Quercus lobata; White oak – Quercus alba; Yellowbark oak – Quercus velutina; Obedient Plant – Physostegia virginiana; Olive – Olea europaea; Onion – Allium. Common onion – Allium cepa; Giant onion – Allium giganteum; Nodding onion – Allium cernuum; Tree onion – Allium canadense
Common name Scientific name Image Notes Abrams' onion Allium abramsii (Ownbey & Aase) McNeal Allegheny onion Allium allegheniense Small Aspen onion Allium bisceptrum S. Watson var. palmeri (S. Watson) Cronquist Autumn onion Allium stellatum Fraser ex Ker Gawl. Bear garlic, Ramsons, Wild Garlic Allium ursinum L. Beegum onion Allium hoffmanii Ownbey
Allium tricoccum with open inflorescence bud (June 6). Allium tricoccum is a perennial growing from an ovoid-conical shaped bulb that is 2–6 cm (1–2 in) long. [4] Plants typically produce a cluster of 2–6 bulbs that give rise to broad, [5] flat, smooth, light green leaves, that are 20–30 cm (8–12 in) long including the narrow petioles, [4] often with deep purple or burgundy tints on ...
Some species (such as Welsh onion A. fistulosum and leeks (A. ampeloprasum)) develop thickened leaf-bases rather than forming bulbs as such. Carl Linnaeus first described the genus Allium in 1753. The generic name Allium is the Latin word for garlic, [9] [10] and the type species for the genus is Allium sativum which means "cultivated garlic". [11]
The tepals are 10–18 mm (13 ⁄ 32 – 23 ⁄ 32 in) long and white, but with a "strong green line". [8] Each plant has two or three narrow, linear leaves, each up to 15 cm (6 in) long. [ 7 ] The leaves have a distinct onion smell when crushed.
Allium canadense, the Canada onion, Canadian garlic, wild garlic, meadow garlic and wild onion [6] is a perennial plant native to eastern North America [a] from Texas to Florida to New Brunswick to Montana. The species is also cultivated in other regions as an ornamental and as a garden culinary herb. [7] The plant is also reportedly ...