Calabash (; Lagenaria siceraria), also known as bottle gourd, white-flowered gourd, long melon, birdhouse gourd, New Guinea bean, Tasmania bean, and opo squash, is a vine grown for its fruit. It can be either harvested young to be consumed as a vegetable, or harvested mature to be dried and used as a utensil, container, or a musical instrument. When it is fresh, the fruit has a light green smooth skin and white flesh. Calabash fruits have a variety of shapes: they can be huge and rounded, small and bottle-shaped, or slim and serpentine, and they can grow to be over a metre long. Rounder varieties are typically called calabash gourds. The gourd was one of the world's first cultivated plants grown not primarily for food, but for use as containers. The bottle gourd may have been carried from Asia to Africa, Europe, and the Americas in the course of human migration, or by seeds floating across the oceans inside the gourd. It has been proven to have been globally domesticated (and existed in the New World) during the Pre-Columbian era. Because bottle gourds are also called "calabashes", they are sometimes confused with the hard, hollow fruits of the unrelated calabash tree (Crescentia cujete), whose fruits are also used to make utensils, containers, and musical instruments. History The bottle gourd has been recovered from archaeological contexts in China and Japan dating to ca. 8,000–9,000 B.P., whereas in Africa, despite decades of high-quality archaeobotanical research, the earliest record of its occurrence remains the 1884 report of a bottle gourd being recovered from a 12th Dynasty tomb at Thebes dating to ca. 4,000 B.P. When considered together, the genetic and archaeological information points toward L. siceraria being independently brought under domestication first in Asia, and more than 4,000 years later, in Africa. The bottle gourd is a commonly cultivated plant in tropical and subtropical areas of the world, and was eventually domesticated in southern Africa. Stands of L. siceraria, which may be source plants and not merely domesticated stands, were reported in Zimbabwe in 2004. This apparent wild plant produces thinner-walled fruit that, when dried, would not endure the rigors of use on long journeys as a water container. Today's gourd may owe its tough, waterproof wall to selection pressures over its long history of domestication. Gourds were cultivated in Africa, Asia, Europe, and the Americas for thousands of years before Columbus' arrival