But of course Dirt, I'll be happy to share! I'm just hoping my memory doesn't fail me as it was shot in 2009! However I think I remember the important stuff. There should be no flash involved here, and I doubt if I used a reflector. If there was a reflector involved it probably was insignificant and only as a fill as the most important light here is the back light from the low sun and any fill would reduce this effect. The back light is what gives the translucent look that makes us able to get an appreciation and a hint for that which is hiding inside the closing bloom.
I also checked EXIF to be even more sure. This was shot 1/10, f/8 at iso 200 late in the afternoon, we can also see this on the bloom as it is in the process to close for the evening.
I have a special love for backlit evening or morning photographs for certain subjects as the light sometimes is of a very special quality. Directional, yet soft. If you want to reproduce this kind of light I recommend that you set up so you have a clear or almost clear sky on a still and calm evening and not too many objects obscuring the setting or rising sun as the light then could end up too soft (sometimes difficult here in the forest, with all trees!). Also for maximum effect you would need a plant with thin petals, the thinner the better. Try to shoot both well before sunset and after and note the differences to see what suits your tastes best. Don't be afraid for very long exposure times, several seconds isn't unusual for macro subjects in these circumstances. Pictures taken in these circumstances sometimes ends up with strong color casts and often benefit from a little bit of contrast boost as the light is so soft.