An Iris with Pointed Petals
Here the petals have been modified so that they are pointed instead of round, and their texture is quite different from that of specimens shown in the preceding pictures. Such matters as these have great interest for the gardener, but are probably not vital from the standpoint of the economy of the plant itself; hence they are particularly subject to variation, affording the plant breeder precisely the opportunity he is seeking.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 10 Chapter 2