Iris louisiana ‘Acadian Miss’. It is widely accepted that Iris louisana cultivars are developed from 5 main North American native species of Iris: I. brevicaulis, giganticaerulea, fulva, nelsonii, and hexagona. 'Acadian Miss' forms sword-like foliage 3-4' tall growing from thick creeping rhizomes. The elegant ruffled flowers 3-5" across are clear white with yellow-green signals and green style arms. Blooms May to July.