1、 Is it a root or a stem

The onion we usually see is actually an underground abnormal stem, that is to say, it is a bulb. Many people believe that it is dug out from the bottom and think this is its root. This is a wrong cognition. The onion can be peeled off. Its bottom is a bulb disk, which is flat, and the middle part also has terminal buds, from which the leaves grow. Moreover, there will be layers of scales around the terminal bud, which will become bulbs after overlapping growth

2、 Morphological characteristics

It is biennial or multi-year. It has no taproot. The root is a string fibrous root and is attached to the base of the stem. Its root system is very weak, and its ability to absorb fertilizer is not very strong. The leaves are dark green and in the shape of a cylinder. The surface of the leaves is also attached with a relatively thick layer of wax powder, which is actually the characteristic of its drought resistance

Its flowering and fruiting period is from May to July. The flowers are pink white, and the perianth piece has a green midvein, which is rectangular and round oval