Many popular and technical reports on watermelon flesh colors ignore green, an uncommon color. The earliest report of this color mutant that we were able to find dates back more than one hundred years. In this report, inheritance of pink-fleshed vs. green-fleshed genes in watermelon was explored and resulted in fruit intermediate in character, the flesh having a yellowish cast tinged with pink (Card and Adams, 1901). Years later, Whitaker and Davis (1962) listed greenish-white as one of the flesh colors found in watermelon, as well as white, yellow, and red. More recently, Robinson and DeckerWalters (1997, page 84) wrote, “The bland to sweet-tasting flesh is usually red, but may be green, orange, yellow or white in some cultivars or landraces.” They also mention, “Citron has white or pale green flesh which is bland or bitter” (p.97). Additionally, green is one of the eight flesh colors and color combinations listed in the Germplasm Resources Information Network for Citrullus spp. (USDA, ARS, GRIN). In addition to the rare reports of green color, the compound giving this greenish cast has not been mentioned.