I've mentioned, in some previous posts, my interest in identifying the wild plants on our property, and especially the plants which are good to eat. The plant you see in the picture above grows all over our yard, seeming to prefer full sun. The cows will eat these plants, but not until they're pretty much out of everything else to eat, during the time when all the plants are dying in the dry season.
The reluctance of the cows may have something to do with the spiky thorns all over this plant. I'd sure be careful, if I was going to eat those leaves!
The fruits appear on the plants as small green balls. Gradually the solid green changes over to the watermelon look of the immature fruits you can see in the first photo. The lighter color goes from white to yellow, the darker green gradually fade, and as the fruit becomes fully ripe it turns entirely yellow.
The mature fruits are about the size of ping pong balls. We brought one into the kitchen and cut it open. Although it smelled like melon, none of us thought it would be a good idea to try it, until we know more about the plant.