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

Cucurbita Pepo is a kind of Cucurbitaceae Cucurbitaceae, belonging to the class Dicotyledonous, angiosperms, distributed in most parts of China, such as Henan, Hebei, Sichuan, Shandong, Anhui and other places. "Beigua" is a semi-wild plant. Because of the low yield, and without the sweetness of watermelon, the fragrance of wax gourd and the high yield of pumpkin, conjoined north melon is not well known.