DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY
Common foxglove flowers (Digitalis purpurea). Close-up showing maturation of the surface of the foxglove flower stigma (female reproductive structure). The spike of a foxglove comprises flowers of different ages, with the oldest (those opening first) towards the base. Here, no anthers (male reproductive surfaces) are visible, but the developing receptive stigmatic surface (green) is at the tip of the style in the flower at centre left. The other flowers show the tip of the style at an earlier stage of maturation.
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