Aril and arilbred irises are derived from native species of the Middle East. They have some of the most remarkable color patterns and flower forms in the genus. The pure arils go completely dormant in summer, which makes them susceptible to rot in rainy or humid climates. Beardless irises come in many different types. Most appear less stiff and formal than the bearded irises, and have more attractive foliage.
Ample moisture is especially important during the spring and fall growing seasons.
Bulb irises are the kind you generally see in florists' shops. Visit the tall bearded iris page. Visit the dwarf and median iris page. Visit the aril and arilbred iris page. Visit the beardless iris page.