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Deep blood-red onions have bulbs of medium size. The inner part is pure white. The outer coats vary in color from dull to deep, glossy red. This onion has a very strong flavor.

Deep Blood-Red Onions

Deep blood-red onions have bulbs of medium size. The inner part is pure white. The outer coats vary…

Early white Naples onions are an early form of the silver skinned section. The little bulbs are produced in early spring.

Early White Naples Onions

Early white Naples onions are an early form of the silver skinned section. The little bulbs are produced…

The James's keeping onion has a pear shape. It is one of the longest keeping varieties of onion.

James's Keeping Onion

The James's keeping onion has a pear shape. It is one of the longest keeping varieties of onion.

The Naples giant rocca onion has a roundish, large bulb. The flesh is thick and white.

Naples Giant Rocca Onion

The Naples giant rocca onion has a roundish, large bulb. The flesh is thick and white.

An edible bulb, produced by a biennial herb of the lily family. The plant has tubulated leaves, a pithy stalk bearing the seed, and the bulb has a strong odor and taste due to an acrid volatile oil that is destroyed by boiling.

Onion

An edible bulb, produced by a biennial herb of the lily family. The plant has tubulated leaves, a pithy…

This illustration shows the shortened types of stems: A, corm of jack-in-the-pulpit. At left surface view showing lateral buds, roots and sheathing leaf arising from top of shortened stem. At right sectional view with folded leaf, l, in bud at apex stem. B, bulb type of shortened stems. At left bulb of onion showing the ensheathing leaves which are swollen at their bases with food, thus forming the bulb. At right, section of a bulb of hyacinth showing the fleshy leaves attached to the very short stem and in the center of the bulb a flower cluster.

Onion

This illustration shows the shortened types of stems: A, corm of jack-in-the-pulpit. At left surface…

This illustration shows a section of a tunicated bulb of the onion.

Onion

This illustration shows a section of a tunicated bulb of the onion.

Pictured is an onion in flower. The flowers bloom in early summer.

Onion

Pictured is an onion in flower. The flowers bloom in early summer.

Pictured is a section of an onion attacked by the larvae of the onion fly. The burrow of the larva is towards the base of the onion. The entire development of an onion fly attack is four to six weeks.

Larvae of Onion Fly

Pictured is a section of an onion attacked by the larvae of the onion fly. The burrow of the larva is…

This is an illustration of crystals from the base of an onion, one of them a hemitrope or double.

Onion Magnified

This is an illustration of crystals from the base of an onion, one of them a hemitrope or double.

Pictured are several forms of onion: (1) flat, (2) long globe, (3) globe, (4) oblong, and (5) oblate.

Forms of Onion

Pictured are several forms of onion: (1) flat, (2) long globe, (3) globe, (4) oblong, and (5) oblate.

Pictured is a multiplier onion and a section of multiplier onion. Multiplier onions contain two or more "hearts" or cores.

Multiplier Onion

Pictured is a multiplier onion and a section of multiplier onion. Multiplier onions contain two or more…

Welsh onion is the common name of <i>allium distulosum</i>. It is a cultivated species.

Welsh Onion

Welsh onion is the common name of allium distulosum. It is a cultivated species.

A dry onion that has a pure white skin and a sweet, mild white flesh.

White Onion

A dry onion that has a pure white skin and a sweet, mild white flesh.

Pictured are bunches of onions from the early spring sowing.

Bunch Onions

Pictured are bunches of onions from the early spring sowing.

Top onions are also called bulblets. The leading top onions are white and red.

Top Onions

Top onions are also called bulblets. The leading top onions are white and red.

The queen onion is a small and very early variety of the silver-skinned section. The bulbs are very small but firm and solid. The skin is thin and silvery white.

Queen Onions

The queen onion is a small and very early variety of the silver-skinned section. The bulbs are very…

Roots aid in support and nutrition for the plant. This is a bulbous root from an onion.

Root

Roots aid in support and nutrition for the plant. This is a bulbous root from an onion.

Trebons onions have large bulbs that taper to the stalk or neck. The flesh is pale and soft.

Trebons Onions

Trebons onions have large bulbs that taper to the stalk or neck. The flesh is pale and soft.

"Tulip bulb; longitudinal section. F, solid stem; B, flower bud; S, leaf-bases serving as bud-scales, and also for the storage of plant food." -Gager, 1916

Tulip Bulb

"Tulip bulb; longitudinal section. F, solid stem; B, flower bud; S, leaf-bases serving as bud-scales,…

The white Spanish onion has large bulbs that are somewhat flattened. The base is broad and sometimes a little hollow and uneven. The skin is a pale straw color.

White Spanish Onions

The white Spanish onion has large bulbs that are somewhat flattened. The base is broad and sometimes…

The yellow danvers onion has medium sized bulbs with a small base. The neck is fine and slender. The flesh is very firm.

Yellow Danvers Onion

The yellow danvers onion has medium sized bulbs with a small base. The neck is fine and slender. The…

A traditional yellow onion.

Danvers Thick Yellow

A traditional yellow onion.