The Spadix of a Calla Lily
From this direct color photograph it will be seen that the central stalk within the lily, called the spadix, is in fact a composite flower itself, on which many minute and inconspicuous blossoms are clustered. These blossoms may be clearly seen on the print above.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 2 Chapter 3