Is an onion a root or a stem?

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1. Is it a root or a stem?

2. Morphological characteristics

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Onions are actually abnormal underground stems, which means they are bulbs. Some people think that this is its root, and it has no taproot. We can peel the onion open and there is a flat bulb disk at the bottom with a terminal bud in the middle. There will be scales around the terminal bud, which will become a bulb after overlapping growth.

1. Is it a root or a stem?

1. Is it a root or a stem?

The onions we usually see are actually abnormal underground stems, which means they are bulbs. Many people think that it was dug out from underneath and that this is its root. This is a wrong understanding. You can peel the onion, and its bottom is a bulb disk, which is flat, and the middle part also has a terminal bud, from which the leaves grow. Moreover, there will be layers of scales around the terminal buds, which will turn into bulbs after overlapping growth.

2. Morphological characteristics

It It is biennial or perennial. It has no main root. The roots are string-shaped fibrous roots and are grown at the base of the stem. Its root system is very weak and its ability to absorb water and fertilizer is not very strong. The leaves are dark green and cylindrical in shape. There is also a relatively thick layer of wax powder on the surface of the leaves. This is actually a characteristic of its drought tolerance.

Its flowering and fruiting period is around May to July , the flowers are pink-white, the tepals have a green midrib, and are oblong and oval.

2. Morphological characteristics

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