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It has been counted several times. 2n=42, differing from some other Louisiana Iris species, so hybrids from crossing with those other species should have an odd number of chromosomes, for example, an Iris with 44 is crossed with this species, the hybrids should have 43 chromosomes. Simonet 1932, 2n=42-Riley 1942; 2n=42 by Randolph & Mitra 1961; 2n-42, Randolph, 1966.Iris fulva, also known as copper iris, is a species in the genus Iris, it is also in the subgenus Limniris and in the series Hexagonae. It is a rhizomatous perennial, endemic to the southern and central United States. It has copper-red to deep red flowers and bright green leaves.
Several American garden nurseries and plant breeders have created many Iris fulva cultivars including, 'Apricot Queen', 'August Flame', 'Autumn Fire', 'Baby Sis Pink' 'Bayou Bandit', 'Bayou Goula', 'Bazeti', 'Bolshevik', 'Bronze Red', 'Chocolate', 'Choctaw Tribe', 'Couperin', 'Cuprea', 'Devil's Advocate', 'Devil's Scion', 'Dwarf Terracotta', 'Dwarf Yellow', 'Edith Dupre', 'Encarnado', 'Esplanade', 'Flash', 'Fulvaflav', 'Fulvaflav', 'Fulva Special', 'Fulvaurea', 'Galloway-Lanoke', 'Georgia Peach', 'Golden Arrowhead', 'Gold In California', 'Gold Medallion', 'Gulf Sunshine', 'Karandash', 'Kraemer Tan', 'Kraemer Yellow', 'Le Vieux Carre', 'Louisiana Sunset', 'Margot Castellanos', 'Maringouin Freak', 'Maringouin Fulva', 'Marvell Gold', 'Mc Gregor', 'Red Fire', 'Sazerac', 'Slick Willie'.Perfect for standing water, Iris fulva (Copper Iris) is a striking perennial with unusual, flat topped, beardless flowers, up to 3 in. across (7 cm), the warm color of copper, terra cotta, brick-red and sometimes yellow. Blooming in late spring to early summer, they rise atop upright stakes reaching 2-3 ft. (60-90 cm). The beauty of the flowers attracts hummingbirds. This Iris species forms foliage clumps of sword-shaped, arching, bright green leaves which arise from shallowly rooted, branching rhizomes and remain attractive through the growing season.
Iris fulva has a copper-red to brick red, and sometimes a yellow flower. The sepals are widely spreading and arching downward. The signal is a faint yellow and basal. The petals are spreading and pendulous, smaller than the sepals. The inflorescence is one- to two-flowered. The bright green leaves are basally arching, arising from shallowly rooted, narrow, compact, and branching rhizomes that can form large clumps.Range & Habitat: The native Copper Iris occurs in southern Illinois, where it is rare and state-listed as 'threatened.' Illinois lies along the northern-range limit of this species. It is found primarily in the lower- to mid-Mississippi valley of the United States. Habitats include swamps (including Bald Cypress swamps), soggy areas of bottomland and floodplain woodlands, low areas along ponds and sloughs, ditches along roads and railroads, and banks of drainage canals. Because of its attractive foliage and flowers, the Copper Iris is cultivated throughout the state. Native populations of this species have declined as a result of habitat destruction. (Source: www.illinoiswildflowers.info)