Iris pseudacorus (Pale-yellow Iris)
|Also known as:||Yellow Flag|
|Habitat:||part shade, sun; marshes, along shores|
|Bloom season:||May - June|
|Plant height:||2 to 4 feet|
|Wetland Indicator Status:||GP: OBL MW: OBL NCNE: OBL|
|MN county distribution (click map to enlarge):|
|National distribution (click map to enlarge):|
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Flower is 3 to 4 inches across with 3 large petal-like sepals that hang down and 3 smaller upright petals. The lower sepals have a ring of reddish brown flecks near the base and are beardless. There are a few flowers at the end of each stalk.
Leaves are long and sword-like, about 1 inch wide and 3 to 4 feet long with a pointed tip. A group of leaves fans out from the base of the plant. The leaves are mostly longer than the flower stalk.
Fruit is an oblong, 3 angled capsule around 2 to 3 inches long and 1/3 to ½ as wide.
Pale-yellow Iris is an invasive species in Minnesota, escaping cultivation and potentially forming large colonies along shores and in shallow waters.
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Photos by K. Chayka taken at Long Lake Regional Park, Ramsey County.
Have you seen this plant in Minnesota, or have any other comments about it?
on: 2011-06-04 17:17:38
There are literally hundreds of the in my yard. The line the spring that feeds in to the south fork of the root river.
on: 2012-02-29 10:42:39
Ive seen this at Elm Creek Park Reserve, pretty Iris, actually would like some on my property. I see no comments on this, are people loving all Iris and not caring to post comments here? The Iris Ive witnesses in MN are slow to spread and maybe not that big of a control problem, maybe Im wrong. Anyone please feel free to reply!!
on: 2012-05-25 18:36:47
There are just a few that are in bloom now along the lake shore near the playground.
on: 2013-06-19 22:24:39
Saw several clusters of them while kayaking down the St Croix between Franconia and Osceola on June 16th.
on: 2019-05-14 20:04:00
I saw it a few years go in a drainage ditch between HWY 61 and the Carlton County Fairgrounds in Barnum.
on: 2021-06-06 21:40:43
Currently three separate clumps flowering on the south and south western edges of Bde Maka Ska (lake calhoun).