It grew out of "melon".

Watermelon is a variety of watermelon, which looks like this:

Cucumber is a kind of seed watermelon, which is an annual plant that likes temperature and heat. Its fruit is small, and it is often opened by hand when eating. The melon seeds are relatively large, shaped like watermelon seeds, with black edges on both sides and yellow and white in the middle. Most of them can be made into melon seeds to eat.

1.A variety of watermelon with smaller fruit and more seeds. This kind of watermelon is mainly cultivated for collecting melon seeds.

2. The fruit of this plant is opened by hand when eating, so it is called melon.

3. Lanzhou seed melon, also known as "playing melon", is named after punching and eating and containing more seeds. Its melon is round, the skin is smooth, light green, with dark green stripes, and the inside of the melon is white or yellowish, which is sweet. Seed melons are mainly produced in Lanzhou and Minqin, Gulang and Yongchang counties in Hexi, Tae Basin in Tacheng area of Xinjiang, Tongliao City in Northeast China, Chifeng City in Inner Mongolia, susong county City in Anhui, and Hebei (Wen 'an and other counties). Here is sandy soil, with suitable temperature, plenty of sunshine, and excellent varieties. The melon seeds produced are black-edged and white-hearted, full of particles and large in shape, so they are known as "Lanzhou Black Melon Seeds" or "Lanzhou Big Plate Melon Seeds" in the international market. In autumn, when the seed melon is ripe, break it with your fist, eat meat and take seeds, wash it with water and dry it in the sun, and it will be ready for the market. Black melon seeds are rich in nutrients such as protein, fat, vitamin B, D, etc., which are widely loved by people for daily consumption.