The bulbous irises might then be divided into three parts: Dutch and English irises (genus Xiphium), Reticulata irises (genus Iridodictyum), and Junos (genus Juno).
The rhyzomatous irises (genus Iris) could be divided into three major parts: beardless irises (subgenera Limniris and Xyridion), crested irises (subgenus Crossiris), and bearded irises (subgenus Iris).
Most of the irises that a gardener would group would be in the beardless iris group or the bearded iris group.