Which comes first, cucumber or melon?

there is no basis to judge which of them appeared first.

Cucumis melo L. is also called cantaloupe and cantaloupe. It is an annual vine herb of Cucurbitaceae. Stems and branches are angular. Tendrils are slender, simple and puberulent. Petiole long with grooves and short bristles; Leaf blade is thick and papery, rough on it, and white and coarse. Flowers unisexual, monoecious. Male flowers: several clustered in leaf axils; Pedicel slender; Corolla yellow; Female flowers: solitary, with rough pedicels and pilose; The ovary is oblong. The shape and color of fruit vary with varieties, usually spherical or oblong, with smooth skin, longitudinal grooves or stripes, and white, yellow or green flesh with sweet smell; The seeds are dirty white or yellowish white, oval or oblong, with sharp apex and smooth surface. Flower and fruit period in summer. Widely cultivated in all parts of China. It is also widely cultivated in temperate to tropical regions of the world. This species is the earliest melon used as fruit in China, and there are many ancient books such as The Book of Songs. The excavated materials such as Mawangdui's female corpse have been common, and Jia Sixie's Qi Min Yao Shu is called small melon, which is different from the ancient wax gourd (big melon). Because this species has a long history of cultivation, there are many varieties, and the shape, color, size and taste of fruit vary with varieties. It is divided into dozens of strains in horticulture, such as common cantaloupe, cantaloupe and white melon, which belong to different strains. This kind of fruit is an important fruit in midsummer; It is used by all herbs, and has the effects of eliminating inflammation and toxic materials, inducing vomiting, removing dampness, and relieving jaundice.