Oklahoma designated watermelon (citrullus lanatus) as the official state vegetable in 2007. The Oklahoma Senate passed the watermelon bill by a 44-2 vote.
Rush Springs has been home to a citrullus lanatus festival since 1948 (the area is known for delicious watermelons grown in the sandy soil that encircles Rush Springs). Ringwood and Valliant also have annual watermelon festivals.
Although there is discussion over whether watermelon is a fruit or a vegetable, Senator Don Barrington (who sponsored the bill) said watermelon comes from the cucumber and gourd families, which are classified as vegetables. Oklahoma also recognizes a state fruit (strawberry).