I am always looking for ways to see wildflowers in a new light. The low-angled light of the late afternoon sun provides the opportunity to see light passing through the flower at angle that can be photographed without lying on the ground. I don’t know if it tells us anything more about the flower, but it is a pretty effect.
Both images today were taken with a Nikon D90 and a Nikon Nikkor 70-300mm AF-S ED VR. Both have been cropped. I used a telephoto because I was hoping to photograph birds. But, the telephoto can photograph wildflowers, albeit with some cropping. This 70-300mm does a nice job; everything is crisp and clear even after cropping.
For post-processing the celandine poppy, I experimented with the Levels tool in Aperture. I let it auto-level the colors, and it make the background change from a neutral dark gray/green to blue. I rather liked it, so I kept it. The phlox was mostly hand-tweaking.