The watermelon is the fruit of a vine that scrambles about the fields and gardens where they are cultivated. The fruit is so heavy, so laden with water, that the vine could never have the strength to support it. The skin of these enormous vegetable fruits is smooth and varies from mottled pale green to uniform dark gree. The interior varies from pink to deep fuschia in colour and can be incredibly sweet. It is thought to have originated in South Africa and is now widespread.