The color of the foxglove flowers is usually a bright purple, but can also be pink, red, white or yellow. The flowers are heavily spotted on the inside and possess large, interlocking hairs that prevent smaller insects from gaining access to the flower’s nectar. Only larger insects like bumblebees can climb into the flower head and gather nectar, whereby flower pollen sticks to their back and legs. It is thought that the function of the colored spots is to guide insects deep into the flowers where nectar and the pollen are.
Today’s photo also shows the colored spots in a foxglove flower. This one is located on the same spike close to the one I photographed yesterday. It supports my impression that the spot patterns in flowers of the same plant are all different.