As everyone who raises iris knows, sooner or later you have to divide your iris
Here are a few pictures of that process – Click any photo to enlarge

2 Dig and wash

Here is that same clump, lifted from the ground and washed so you can see how the rhizomes connect together

3 Separate Rhizomes

This is that same clump, split apart. There are 7 rhizomes to replant and 2 spent bloomstalks to throw away

4 Trim and plant

This is a picture of one of the rhizomes, still wet from being washed See the “babies” along the side? This one is ready to have it roots and foliage trimmed so it can be replanted