Watermelon (Citrullus Lanatus (Thunb.) Matsum. et Nakai) annual vines Fujimoto; stout stems and branches with obvious edges. Tendrils are sturdy, pubescent, petioles thick, densely pubescent. Leaves are papery, triangular, ovate, and whitish green, with two short hairs, and a heart-shaped leaf base. Monoecism. Female and male flowers are solitary in axils of leaves. Male pedicels 3-4 cm long, densely yellowish brown villous; calyx tube broadly bell shaped; corolla pale yellow; stamens nearly free, filaments short, chamber. Female flowers: calyx and corolla with male flowers; ovary ovate, stigma kidney shaped. Large fruit, near spherical or oval, fleshy, juicy, smooth skin, color and ornamentation of various types. Most of the seeds, oval, black, red, both sides smooth, base blunt round, usually slightly arched edge, summer fruit period.
There are many varieties and cultivars in China. There are various forms of pericarp, pulp and seeds. They are most famous in Xinjiang, Gansu, Lanzhou, Shandong Dezhou, Jiangsu and Dongtai. The seed may come from Africa, are widely cultivated in tropical to temperate world, Jin and Yuan was imported to Chinese.
For the summer watermelon fruit, flesh sweet, cool Qushu; seed oil can be used for recreation food; peel medicinal, heat, diuretic, blood pressure lowering effect.