• Iris Linnaeus, 1753 [Family: Iridaceae]
• Iris Saussure, 1869 [Family: Eremiaphilidae]
• Iris Staudinger, 1891 (uncertain) [Family: Lycaenidae]
• Iris acleantha Small accepted as Iris hexagona Walt.
• Iris alabamensis Small accepted as Iris hexagona Walt.
• Iris albilinea Alexander accepted as Iris hexagona Walt.
• Iris albispiritus Small accepted as Iris hexagona Walt.
• Iris alticristata Small accepted as Iris giganticaerulea Small
• Iris amabilis Eastw. accepted as Iris macrosiphon Torr.
• Iris amnicola Alexander accepted as Iris hexagona Walt.
• Iris aphylla Linnaeus
• Iris atrocyanea Small accepted as Iris hexagona Walt.
• Iris atroenantha Small accepted as Iris hexagona Walt.
• Iris auralata Small accepted as Iris hexagona Walt.
• Iris aurilinea Alexander accepted as Iris giganticaerulea Small
• Iris bifurcata Small accepted as Iris hexagona Walt.
• Iris bracteata S. Wats.
• Iris brevicaulis Raf.
• Iris brevipes Small accepted as Iris brevicaulis Raf.
• Iris brunneri Saussure, 1871 accepted as Deiphobe brunneri (Saussure, 1871)
• Iris californica Leichtl. accepted as Iris macrosiphon Torr.
• Iris callilopha Alexander accepted as Iris hexagona Walt.
• Iris callirhodea Alexander accepted as Iris hexagona Walt.
• Iris carolina Radius accepted as Iris prismatica Pursh ex Ker-Gawl.
• Iris caucasica Saussure, 1871 accepted as Rivetina caucasica (Saussure, 1871)
• Iris cerasioides Alexander accepted as Iris hexagona Walt.
• Iris chlorolopha Small accepted as Iris hexagona Walt.
• Iris chrysaeola Small accepted as Iris hexagona Walt.
• Iris chrysolopha Small accepted as Iris hexagona Walt.
• Iris chrysophylla T.J. Howell
• Iris citricristata Small accepted as Iris giganticaerulea Small
• Iris citrina Eastw. accepted as Iris tenuissima Dykes
• Iris citriviola Small accepted as Iris hexagona Walt.
• Iris coeca Uvarov, 1931
• Iris cristata Ait.
• Iris crocinubia Alexander accepted as Iris hexagona Walt.
• Iris cyanantha Alexander accepted as Iris hexagona Walt.
• Iris cyanochrysea Small accepted as Iris hexagona Walt.
• Iris deserti Uvarov, 1923
• Iris dewinkeleri Small accepted as Iris hexagona Walt.
• Iris douglasiana Herbert
• Iris duerinckii Buckl. accepted as Iris aphylla Linnaeus
• Iris ecristata Alexander accepted as Iris fulva Ker-Gawl.
• Iris elephantina Small accepted as Iris giganticaerulea Small
• Iris ensata Thunb.
• Iris fasciata (Olivier, 1792)
• Iris fernaldii R.C. Foster
• Iris flavescens Delile
• Iris florentina Linnaeus accepted as Iris germanica Linnaeus
• Iris fluviatilis Small accepted as Iris giganticaerulea Small
• Iris foetidissima Linnaeus
• Iris foliosa Mackenzie & Bush accepted as Iris brevicaulis Raf.
• Iris fourchiana Small accepted as Iris hexagona Walt.
• Iris fraterna Saussure, 1871 accepted as Rivetinula fraterna (Saussure, 1871)
• Iris fulva Ker-Gawl.
• Iris fulva mosaic virus
• Iris fulvala Dykes
• Iris fulvaurea Small accepted as Iris hexagona Walt.
• Iris fumiflora Alexander accepted as Iris hexagona Walt.
• Iris fumifulva Small accepted as Iris hexagona Walt.
• Iris fuscaurea Small accepted as Iris hexagona Walt.
• Iris fuscirosea Small accepted as Iris hexagona Walt.
• Iris fuscisanguinea Alexander accepted as Iris hexagona Walt.
• Iris fuscivenosa Small accepted as Iris hexagona Walt.
• Iris gentilliana Alexander accepted as Iris hexagona Walt.
• Iris georgiana Britt. accepted as Iris hexagona Walt.
• Iris germanica Linnaeus
• Iris giganticaerulea Small
• Iris hartwegii Baker
• Iris hexagona Walt.
• Iris hoogiana Dykes
• Iris hookeri Penny ex D. Don accepted as Iris setosa Pallas ex Link
• Iris humboldtiana Eastw. accepted as Iris tenuissima Dykes
• Iris ianthina Alexander accepted as Iris hexagona Walt.
• Iris innominata Henderson
• Iris insolita Mistshenko, 1956
• Iris iochroma Small accepted as Iris hexagona Walt.
• Iris iocyanea Small accepted as Iris hexagona Walt.
• Iris iodantha Alexander accepted as Iris hexagona Walt.
• Iris ioleuca Alexander accepted as Iris hexagona Walt.
• Iris iophaea Alexander accepted as Iris hexagona Walt.
• Iris kaempferi Sieb. ex Lem. accepted as Iris ensata Thunb.
• Iris keralensis Vyjayandi, Narendran & Mukherjee, 2006
• Iris kimballiae Small accepted as Iris hexagona Walt.
• Iris lacustris Nutt.
• Iris laevigata Fisch.
• Iris lancipetala Alexander accepted as Iris hexagona Walt.
• Iris landsdaleana Eastw. accepted as Iris purdyi Eastw.
• Iris longipetala Herbert accepted as Iris missouriensis Nutt.
• Iris ludoviciana Small accepted as Iris hexagona Walt.
• Iris lutescens Lam.
• Iris macrosiphon Torr.
• Iris marplei Alexander accepted as Iris hexagona Walt.
• Iris martinicensis Jacq. accepted as Trimezia martinicensis (Jacq.) Herbert
• Iris masoni Westwood, 1889 accepted as Caliris masoni (Westwood, 1889)
• Iris mild mosaic virus
• Iris minima Ramme, 1951
• Iris miraculosa Small accepted as Iris giganticaerulea Small
• Iris mississippiensis Alexander accepted as Iris brevicaulis Raf.
• Iris missouriensis Nutt.