When you look carefully at the following three pictures, you will see that the plant here is reduced to just a flower. As long as this is able to close the circle from seed to seed all is fine. These are annual plants, remember.
The last two pictures are basically the same. The first of the two shows a bit of the background as well, whereas in the last one the camera was tilted a bit downwards, so that attention is focused completely on the flower. I cannot really say one picture is better than the other; it depends on what story you want it to tell.