A Broad-Petalled Iris
The form of the iris is characteristic, and there is not as wide variation in this regard among the different varieties of this tribe as among many others. Yet the form of the petals may be very conspicuously modified, as this specimen shows. Interesting studies in form variation might be made by crossing such a specimen as this with the one shown in the preceding picture.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 10 Chapter 2