There are white gourd, pumpkin and watermelon, why not north melon?

Zucchini (Cucurbitaceae) is a kind of Cucurbitaceae, which belongs to dicotyledonous plants and angiosperms and is distributed in most parts of China, such as Henan, Hebei, Sichuan, Shandong and Anhui. "Beigua" is a semi-wild plant. Because of the low yield, it is not as sweet as watermelon, the fragrance of wax gourd and the high yield of pumpkin, conjoined north melon is not well known.