Authentic Wisconsin.  Blue Flag Iris - Iris versicolor


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 21, 2019.

Above: Blue Flag Iris along Ho-Nee-Um boardwalk by the source of Dancing Sands Spring. (6/21/19). NOTE: Same location as where Obedient Plant was in bloom in August.


Blue Flag Iris - Iris versicolor

The Blue Flag Iris is native to North America, in the Eastern United States and Eastern Canada. It is common in sedge meadows, marshes, and along streambanks and shores.

NOTE: This plant is hazardous. The species has been implicated in several poisoning cases of humans and animals who consumed the rhizomes, which have been found to contain a glycoside, iridin. The sap can cause dermatitis in susceptible individuals.

Other names include: harlequin blueflag, larger blue flag, northern blue flag and poison flag.




Blue Flag
(Iris versicolor)
by Scottish author, Elizabeth Gordon

Blue Flag's as pretty as can be,

Cousin to Mam'selle Fleur De Lis;

Loves cool damp places, and is fond

Of living near a stream or pond."



For more information on Blue Flag Iris, visit Wikipedia.

Or, visit the Wisconsin State Herbarium.


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 4, 2020.
Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 4, 2020.
Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 4, 2020.
Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 4, 2020.
Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 4, 2020.
Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 11, 2020.
Blue Flag Iris in UW Arboretum Nature Garden on May 25, 2021.
Blue Flag Iris in UW Arboretum Nature Garden on May 25, 2021.
lue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on May 26, 2021.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on June 21, 2020.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on June 21, 2020.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on June 21, 2020.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on May 25, 2021.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on May 25, 2021.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on May 25, 2021.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on May 29, 2021.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on May 29, 2021.
White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on May 29, 2021.

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Wisconsin Wildflowers


Blue Flag Iris
Iris versicolor


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on May 26, 2021.

Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on May 26, 2021.


Above: Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring in U.W. Arboretum. (5/26/21)


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 2, 2021.

Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 2, 2021.


Above: Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring in U.W. Arboretum. (6/02/21)


Blue Flag Iris in UW Arboretum Rain Garden June 4, 2021.


Above: Blue Flag Iris in UW Arboretum Rain Garden .(6/04/21)


White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra on May 29, 2021.


Above: White Iris (IRIS SETOSA ALBA) in cattails on south shore of Lake Wingra (5/29/21)


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 11, 2020.


Above: Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring in U.W. Arboretum. (6/11/20)


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 13, 2019.

Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 13, 2019.

Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 13, 2019.


Above: Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring in U.W. Arboretum. (6/13/19)


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 18, 2019.

Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 18, 2019.

Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 18, 2019.


Above: Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring in U.W. Arboretum. (6/18/19)


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 18, 2019.


Above: Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring in U.W. Arboretum. (6/21/19)


Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring on June 1, 20120.


Above: The first bloom of the season of Blue Flag Iris along Ho-Nee-Um boardwalk by Dancing Sands Spring in U.W. Arboretum. (6/01/20)


1919 Blue flag iris illustration by Mary Vaux Walcott.

Above: 1919 Iris versicolor illustration by Mary Vaux Walcott. Smithsonian American Art Museum, Gift of the artist.


Iris by Elizabeth Gordon with illustration by Janet Laura Scott circa 1918.

Blue Flag Iris illustration by Alice Lounsberry circa 1899.

Above: Blue Flag Iris illustration by Alice Lounsberry circa 1899.



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