Bearded rhizomatous irises
Section Iris
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Beardless rhizomatous irises It has been generally divided into 2 sections, 'Limniris', which is further divided down to about 16 series and 'Lophiris' (also known as 'Evansias' or crested iris.[1]
Section Limniris (listed in alphabetical order) Series Californicae Pacific Coast irises
Series Chinenses (from east Asia)
Series Ensatae
Series Foetidissimae
Series Hexagonae (known as the Louisiana irises)
Series Laevigatae (which includes the Japanese irises)
Series Longipetalae (Rocky Mountain or long-petaled iris)
Series Prismaticae (contains just one species from America)
Series Ruthenicae
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Series Sibiricae (Siberian irises)
Series Spuriae
Series Syriacae (species with swollen leaf bases and spiny bristles)
Series Tenuifoliae (mostly semi-desert plants)
Series Tripetalae (mostly having three petals)
Series Unguiculares
Series Vernae (contains just one species from America)
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Section Lophiris
Section Unguiculares
Unplaced hybrids
Smooth-bulbed bulbous irises. Formerly genus Xiphion.
Section Xiphium
Bulbous irises. Formerly genus Junopsis.
Section Nepalensis
Smooth-bulbed bulbous irises known as "junos". Formerly genus Juno.
Section Scorpiris
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See more species listed in 'Scorpiris' subgenus.
Reticulate-bulbed bulbous irises. Formerly genus Iridodictyum.
Section Hermodactyloides