iris Series Longipetalae (Rocky Mountain or long-petaled iris) Iris longipetala Herb. – (Coast iris) Iris missouriensis – Rocky Mountain iris, Western blue flag Series Prismaticae (contains just one species from America) Iris prismatica Pursh ex Ker-Gawl. – (Slender blue flag) Series Ruthenicae Iris ruthenica Ker-Gawl. Iris uniflora Pall. Series Sibiricae (Siberian irises) Iris bulleyana Dykes Iris chrysographes – Black iris Iris clarkei Baker Iris delavayi Micheli Iris forrestii Dykes Iris sanguinea Hornem. ex Donn – Blood iris, ayame (Japanese) Iris sibirica – Siberian iris Iris typhifolia Kitag. Iris wilsonii C.H.Wright Series Spuriae Iris brandzae Prod. Iris crocea Jacquem. ex R.C.Foster (including I. aurea) Iris graminea L. Iris halophila Pall. Iris halophila var. sogdiana (Bunge) Grubov Iris kerneriana Asch. & Sint. Iris ludwigii Maxim. Iris notha M.Bieb. Iris orientalis Mill. – (Yellow-banded iris) Iris pontica Zapal. Iris pseudonotha Galushko Iris sintenisii Janka Iris spuria – Blue iris Iris spuria subsp. carthaliniae (Fomin) B.Mathew Iris spuria subsp. demetrii (Achv. & Mirzoeva) B.Mathew Iris spuria subsp. maritima (Dykes) P.Fourn. Iris spuria subsp. musulmanica (Fomin) Takht. Iris xanthospuria B.Mathew & T.Baytop Series Syriacae (species with swollen leaf bases and spiney bristles) Iris grant-duffii Baker Iris masia Foster Series Tenuifoliae (mostly semi-desert plants) Iris anguifuga Y.T.Zhao & X.J.Xue Iris bungei Maxim. Iris cathayensis Migo Iris farreri Dykes Iris kobayashii Kitag. Iris loczyi Kanitz Iris qinghainica Y.T.Zhao Iris songarica Schrenk Iris tenuifolia Pall. Iris ventricosa Pall. Series Tripetalae (mostly having three petals) Iris hookeri Penny – (Hooker's iris) Iris setosa Pallas ex Link – (Beachhead iris) Iris tridentata Pursh – (Savanna iris) Series Unguiculares Iris lazica Albov Iris unguicularis Poir. Series Vernae (contains just one species from America) Iris verna L. – Dwarf violet iris Section Lophiris Otherwise known as 'Evansias' or crested iris. Iris confusa Iris cristata Iris formosana Iris japonica Iris lacustris Iris latistyla Iris milesii Iris subdichotoma Iris tectorum (Wall iris) Iris tenuis (Clackamas iris) Iris wattii References Sources The Iris, by Brian Mathew, Batsford, 1989, 256 pages, 38 colour photos, 32 b/w photos, 16 illustrations, External list Clark University's classification of Iris Iris (plant) Plant subgenera