Watermelon, a plant that grows as a vine on the surface of the ground, producing an edible fruit. The fruit is round or oblong, with a hard rind that may be light green, dark green, or alternately light and dark. The pulp is red, pink, yellow, or white. It usually contains many smooth, flat seeds, which may be black, brown, tan, white, or mottled. The melons are usually 1 1/2 to 2 feet (45 to 60 cm) long and weigh 20 to 50 pounds (9 to 23 kg).Watermelons are large, sweet fruits with seeded, pink flesh.
Watermelon pulp is 92 per cent water and 7 per cent carbohydrates. It contains a sweet, watery juice and makes a refreshing dessert. The rind may be pickled and preserved. The seeds may be roasted.
The watermelon vine is hairy and bears oblong leaves, four to seven inches (10 to 18 cm) long, that are deeply cut into several narrow lobes. The five-lobed blossom is light yellow, about 1 1/2 inches (4 cm) wide. The plants are cultivated in small mounds spaced about eight feet (2.4 m) apart, with two or three plants in each mound. Watermelons are grown in most temperate regions of the world.
Citron (or preserving) melon is a variety of watermelon grown for its thick rind, used in making preserves. It contains less sugar than the common watermelon and has a white pulp.
Watermelons have been cultivated for more than 4,000 years. The plant is native to Africa. Seedless watermelons, considered to have superior taste, were introduced in 1948.
The watermelon is Citrullus lanatus; the citron melon, C. l. citroides. Both belong to the gourd family, Cucurbitaceae.