Species are the world's wildflowers. This horticultural class of Iris includes all botanical species in the Genus Iris. All Iris can be placed either in the species class or the Spec-X class for hybrids since all plants are either species or hybrids.
While most species have not been developed even in a given wild population there is variability that may be more worthwhile as a garden plant. These various wild forms and naturally occurring hybrids of the Sweet Iris (I. pallida) and the Hungarian iris (I. variegata) form the basis of most hybrid bearded iris. Median forms of bearded iris (intermediate bearded, or IB; miniature tall bearded, or MTB; etc.) are derived from crosses between tall and dwarf species like Iris pumila.