Most irises grow from thick, underground stems or rhizomes. A few species are bulbous. An iris flower typically consists of 6 segments. The 3 inner segments, which are generally upright, are referred to as standards. The drooping, outer 3 segments are known as falls.
Bearded irises are one of the most popular and widely grown perennials in the home landscape.
Though not as widely grown, several other types or species of iris are also attractive additions to the perennial garden. By selecting and planting several different iris species, gardeners can enjoy blooming irises from April through July. Bearded irises are available in a wide range of colors, including white, yellow, orange, pink, wine-red, blue, and purple. The flowers of many varieties possess various combinations or blends of these colors. Bearded irises bloom in early to late spring.