Macro Photo of Flowering Dogwood Blossoms
In which the showy part is not actually the flower; it's a bract.
The white ‘petals’ of the dogwood tree are actually oversized bracts; the flowers are the tiny things in the center. There is a cluster of flowers, which is surrounded by the four bracts.
This is another image shot with the Nikon scanner lens and Sony camera. I added some extension tubes to get more magnification on this photograph. It is approximately life size (1:1), but I did not calibrate the scale.
Here is a crop of the image, with the flowers at 100%, full scale. Lots of detail.