The ximenia is a fruit found in Africa. The rind is orange, although a particular variety found in Ethiopia has a yellow skin. The fruit grows to be 1 1/4 inches long. It has a bitter and tart flavor, and each fruit has an edible seed inside it.
In Mandarin Chinese, "xigua" (pronounced "shi gwa") refers to a particular variety of small watermelons. The rind is found in various colors, including green, yellow and black. Xiguas are commonly grown and eaten in Africa as well as China. The varieties of watermelon eaten in the United States tend to be larger than xiguas.