Iris ( Fourfold White Iris )
Rhizomatous irises have rhizomes as rootstocks , close to or on the surface , or just below primer coat - level , which produce linear to sword - shape leave-taking , nearly always in basal fans , and simple or branched flower stems . The heyday have 3 upright petals , called standards , and 3 large , pendent or spreading petals , called falls . Siberian irises lack the “ beard ” of colored hairs at the foundation of each fall that other iris groups have ....