Most wild flowers soon wither if you pick them, but you can preserve them for a long time by pressing or drying them. Choose only flowers that you know are common, and do not pick them unless there are lots of them.Remember to pick a stem with a leaf, or take a separate leaf to press with it. Flat flower heads like buttercups, violets, Blue Columbine, Wild Flax, and Prairie Star press well.Avoid very bulky flower heads like Red Clover, sunflowers, or Teasel.rying Wildflowers. Drying is even better than pressing for preserving wild flowers. It keeps their shape as well as their color, and in some cases dried flowers are hard to tell from fresh ones. Members of the daisy family, like daisies, thistles, and dandelions all dry well.