Watermelon and watermelon vine

Watermelons are a naturally occuring block that spawn on the surface similarly to pumpkins. They can be crafted into watermelon slices which can be eaten. Watermelons can also be grown from seeds, which will first grow a watermelon vine, eventually growing into a watermelon on the same block.

Watermelons were added in Xie's Farming Mod v1.0, but were removed after the Adventure Update since melons were added to vanilla.