A linked country, state or province will take you to a plant checklist for that area, where you may find more info on the native irises. For all of North America try the Biota of North America Program. For a checklist of irids in New England click here.
Alabama - cristata, fulva, hexagona, verna, virginica
Arizona - missouriensis
Arkansas - cristata, fulva, brevicaulis, verna
California - bracteata, crysophylla, douglasiana, fernaldii, hartwegii, innominata, macrosiphion, missouriensis, munzii, purdyi, thompsonii, tenax, tenuissima
Colorado - missouriensis
Connecticut - prismatica, versicolor
Delaware - prismatica
Florida- brevicaulis, hexagona, tridentata, verna, virginica
Georgia - cristata, hexagona, prismatica var. austrina, tridentata, verna, virginica
Idaho - missouriensis
Illinois - brevicaulis, cristata, fulva, versicolor (?)***, virginica var. shrevei
Indiana - cristata, virginica var. shrevei
Iowa - virginica var. shrevei
Kansas - brevicaulis, virginica var. shrevei
Kentucky - brevicaulis, cristata, fulva, verna
Louisiana - brevicaulis, fulva, giganticerulea, hexagona*, nelsonii, virginica var. shrevei
Maine - prismatica, versicolor, setosa var. canadensis**
Maryland - cristata, prismatica, verna, versicolor, virginica
Massachusetts - prismatica, versicolor
Michigan - lacustris, versicolor
Minnesota - virginica var. shrevei, versicolor
Mississippi - cristata, fulva, brevicaulis, giganticerulea, hexagona, verna, virginica
Missouri- cristata, fulva, brevicaulis, virginica var. shrevei
Montana - missouriensis
Nebraska - missouriensis
Nevada - missouriensis
New Hampshire - prismatica, versicolor
New Jersey - prismatica, versicolor
New Mexico - missouriensis
New York - prismatica, versicolor
North Carolina - cristata, prismatica var. austrina, tridentata, verna, virginica
North Dakota - missouriensis
Ohio - cristata, brevicaulis, fulva, lacustris, versicolor, virginica var. shrevei
Oklahoma - cristata
Oregon - bracteata, crysophylla, douglasiana, innominata, missouriensis, thompsonii, tenax, tenuis
Pennsylvania - cristata, prismatica, verna, versicolor
Rhode Island - prismatica, versicolor
South Carolina - brevicaulis (?) ****, cristata, hexagona, tridentata, verna, virginica
South Dakota - missouriensis
Tennessee- brevicaulis, cristata, fulva, prismatica var. austrina, verna, virginica
Texas- brevicaulis, fulva, giganticerulea, hexagona*, virginica var. shrevei
Utah- missouriensis
Vermont - prismatica, setosa var. canadensis ** (not confirmed, see New England irid checklist), versicolor
Virginia - cristata, prismatica, verna, versicolor, virginica
Washington - missouriensis, tenax
West Virginia - cristata, verna, versicolor
Wisconsin - lacustris, versicolor, virginica var. shrevei
Wyoming - missouriensis
British Columbia - missouriensis, setosa
Labrador - setosa var. canadensis **, versicolor
Manitoba - versicolor
New Brunswick - setosa var. canadensis **, versicolor
Newfoundland - setosa var. canadensis **, versicolor
Nova Scotia - prismatica, setosa var. canadensis**, versicolor
Ontario - brevicaulis, lacustris, versicolor, virginica var. shrevei
Prince Edward Island - setosa var. canadensis **, versicolor*
Quebec - setosa var. canadensis **, versicolor, virginica var. shrevei
Saskatchewan - versicolor
Yukon - setosa
* Reports of I. hexagona in Texas and Lousiana probably represent I. giganticerulea, once considered a form of I.hexagona.
** Recent investigations indicate that I. setosa var. canadensis may deserve species status. As such, the proper name would be I. hookeri.
*** A recent literature review by W. Stan Tyson indicates that I. versicolor may not be native to Illinios. Anyone who has information to the contray please contact me.
**** A plant collected in SC by in appears to be I_brevicaulis.
Last modified 9/03.