Watermelon (Citrullus lanatus, Family Cucurbitaceae) is the fruit and plant of a vine-like (climber and trailer) herb originally from southern Africa. This flowering plant bears an accessory fruit of a type that botanists call a false berry. The watermelon fruit, loosely considered a type of melon (although not in the genus Cucumis), has a smooth exterior rind and a juicy, sweet, usually red interior flesh. The species descriptor Citrullus vulgaris is sometimes, synonymously, used to refer to this plant (vulgaris meaning "common" — Shosteck, 1974).HistoryDavid Livingstone, an African explorer, described watermelon as abundant in the Kalahari Desert, where it is believed to have originated. There, the ancestral melon grows wild and is known as the Tsamma melon (Citrullus lanatus var citroides). It is recognizable by its pinnatafid leaves and prolific fruit, up to 100 melons on a single vine. For this reason it is a popular source of water in the diet of the indigenous people, as well as a food for humans and livestock. The flesh is similar to the rind of a watermelon and is often known as citron melon (distinct from the actual citron, of the citrus family); it is used for making pickles, and because of its high content of pectin is popular as a constituent of jams, jellies, and other gelled preserves. It has established itself in the wild in Baja California.我是原创
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