Irises are hardy plants (able to survive outside during winter) that are easy to grow. They attract butterflies and hummingbirds. Irises are a favorite cut flower. The bearded irises ("Iris germanica") is the tallest at about . Irises generally have three large sepals on the outside called "falls". They have three inner petals called "standards". Irises that are called bearded are because of soft hairs growing in the center. Irises that are called combed have a ridge of hairs in the center. A common name for some species is 'flags'. Plants of the subgenus "Scorpiris" are widely known as 'junos', particularly in horticulture. 