Once the label is removed from a rhizome at planting time all Iris look exactly alike. If you want to keep track of the variety name (or color) make a chart of the Iris as you plant them. Keep this chart handy for reference when they bloom in the spring. Another way is to prepare a permanent garden marker with the variety name and place it next to the rhizomes. These garden labels are readily available at many nurseries and garden supply stores.