Pale Yellow Iris Iris pseudacorus LinnaeusNon-native  -  Invasive    Synonyms: Water Flag.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Liliales   >   Family Iridaceae   >   Genus Iris   

Status:

Pale Yellow Iris is a non-native iris from Europe, and grows in wet areas. Brown and Brown (1984) reported it as an infrequent escape, known from Harford County. A few decades later, it had become the most abundant wetland iris in the Washington, D.C. region (J. Parrish and R. Simmons, pers. comm., March 2021). It greatly outnumbers the native wetland blue irises Virginia Iris and Harlequin Blueflag. Pale Yellow Iris is an invasive species in Maryland (MISC 2022).

Where to find:

Wet areas, such as marshes and streamsides. To make a positive identification, it is best to visit wetlands in May (J. Parrish, pers. comm.)

There are 182 records in the project database.

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Pale Yellow Iris blooming in Dorchester Co., Maryland (6/25/2013). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Worcester Co., Maryland (5/28/2015). Photo by Jim Stasz. (MBP list)

Pale Yellow Iris blooming in Anne Arundel Co., Maryland (5/13/2011). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/7/2011). Photo by Bill Harms. (MBP list)

Pale Yellow Iris blooming in Allegany Co., Maryland (6/8/2015). Photo by Kimberly Booth. (MBP list)

Pale Yellow Iris blooming in Montgomery Co., Maryland (5/19/2015). Photo by Fritz Flohr Reynolds. (MBP list)

Pale Yellow Iris in Kent Co., Maryland (5/23/2014). Photo by Nancy Martin. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/2/2017). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Somerset Co., Maryland (6/1/2020). Photo by Tom Feild. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/24/2016). Photo by Jim Wilkinson. (MBP list)

Pale Yellow Iris blooming in Harford Co., Maryland (5/28/2018). Photo by Josh Emm. (MBP list)

A Pale Yellow Iris in Metuchin, New Jersey (6/9/2007). Photo by Anita Gould. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/7/2017). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Needham, Massachusetts (5/24/2012). Pale Yellow Iris is introduced from Eurasia and has become established across much of eastern North America. Photo by Tom Palmer. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/9/2017). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/10/2017). Photo by Bill Hubick. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/11/2017). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (6/29/2017). Photo by Bill Hubick. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5//). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (4/22/2018). Photo by Bill Hubick. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/8/2017). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris blooming in Anne Arundel Co., Maryland (5/1/2017). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/10/2017). Photo by Bill Hubick. (MBP list)

Pale Yellow Iris in Worcester Co., Maryland (5/16/2017). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris blooming in Harford Co., Maryland (5/14/2017). Photo by Josh Emm. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/28/2017). Photo by Kirsten Johnson. (MBP list)

Pale Yellow Iris blooming in Baltimore Co., Maryland (6/2/2017). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/21/2018). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris blooming in Harford Co., Maryland (5/26/2018). Photo by Josh Emm. (MBP list)

Pale Yellow Iris in Dorchester Co., Maryland (5/22/2019). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/25/2019). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris blooming in Dorchester Co., Maryland (5/11/2019). Photo by Josh Emm. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/11/2019). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/19/2020). Photo by Jane Hill. (MBP list)

Pale Yellow Iris blooming in Harford Co., Maryland (5/25/2020). Photo by Josh Emm. (MBP list)

Pale Yellow Iris blooming in Montgomery Co., Maryland (5/24/2020). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/20/2020). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/8/2020). Photo by J Patrick Brooks. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/20/2016). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/21/2016). (c) Julie, some rights reserved (CC BY-NC). Photo by Julie via iNaturalist. (MBP list)

Pale Yellow Iris in Harford Co., Maryland (4/26/2020). (c) ksgarman, some rights reserved (CC BY-NC). Photo by ksgarman via iNaturalist. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/18/2020). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/19/2020). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/18/2020). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Allegany Co., Maryland (6/17/2020). Photo by Mark Eanes. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/12/2021). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/30/2021). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Talbot Co., Maryland (5/31/2021). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/31/2021). (c) R. DN., some rights reserved (CC BY). Photo by R. DN. via iNaturalist. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/31/2021). (c) R. DN., some rights reserved (CC BY). Photo by R. DN. via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (10/7/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (10/7/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (10/7/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/7/2011). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/13/2011). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/13/2011). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/9/2017). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/17/2021). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/7/2017). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/14/2010). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (6/29/2017). (c) Bill Hubick, all rights reserved. Photo by Bill Hubick. (MBP list)

Pale Yellow Iris in Cecil Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/15/2022). (c) wueckermann, some rights reserved (CC BY-NC). Photo by wueckermann via iNaturalist. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/21/2022). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/21/2022). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/22/2022). (c) Jim Brighton, some rights reserved (CC BY-NC). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Charles Co., Maryland (5/21/2022). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (6/2/2022). (c) belby, some rights reserved (CC BY-NC). Photo by Bonnie Bell. (MBP list)

Pale Yellow Iris in Dorchester Co., Maryland (6/5/2022). (c) Jim Brighton, some rights reserved (CC BY-NC). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Talbot Co., Maryland (7/16/2022). No rights reserved. Photo by Sam Droege. (MBP list)

Pale Yellow Iris in Charles Co., Maryland (5/12/2020). (c) Tim Emhoff, some rights reserved (CC BY-NC). Photo by Tim Emhoff via iNaturalist. (MBP list)

Pale Yellow Iris in Charles Co., Maryland (5/12/2020). (c) Tim Emhoff, some rights reserved (CC BY-NC). Photo by Tim Emhoff via iNaturalist. (MBP list)

Pale Yellow Iris in Cecil Co., Maryland (5/19/2021). (c) stinkpot, some rights reserved (CC BY-NC). Photo by stinkpot via iNaturalist. (MBP list)

Pale Yellow Iris in Cecil Co., Maryland (5/19/2021). (c) stinkpot, some rights reserved (CC BY-NC). Photo by stinkpot via iNaturalist. (MBP list)

Pale Yellow Iris in Cecil Co., Maryland (5/19/2021). (c) stinkpot, some rights reserved (CC BY-NC). Photo by stinkpot via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2022). (c) bbuzas, some rights reserved (CC BY-NC). Photo by bbuzas via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2022). (c) bbuzas, some rights reserved (CC BY-NC). Photo by bbuzas via iNaturalist. (MBP list)

Pale Yellow Iris in Dorchester Co., Maryland (5/25/2022). (c) Cindi Fitzgerald, some rights reserved (CC BY-NC). Photo by cin579 via iNaturalist. (MBP list)

Pale Yellow Iris in Dorchester Co., Maryland (5/25/2022). (c) Cindi Fitzgerald, some rights reserved (CC BY-NC). Photo by cin579 via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/26/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/26/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/26/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/15/2021). (c) bbuzas, some rights reserved (CC BY-NC). Photo by bbuzas via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/15/2021). (c) bbuzas, some rights reserved (CC BY-NC). Photo by bbuzas via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/26/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/26/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/26/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/2/2010). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/2/2010). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/2/2010). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Harford Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC). Photo by Josh Emm. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/23/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/19/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/9/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/9/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/9/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/9/2022). (c) David, some rights reserved (CC BY-NC-SA). Photo by David via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (6/2/2022). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (6/2/2022). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (6/9/2022). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/29/2022). (c) Robert Ferraro, some rights reserved (CC BY-NC). Photo by ptbrnchbob via iNaturalist. (MBP list)

Pale Yellow Iris in Carroll Co., Maryland (5/17/2022). (c) tomfeild, some rights reserved (CC BY-NC). Photo by Tom Feild. (MBP list)

Pale Yellow Iris in Carroll Co., Maryland (5/17/2022). (c) tomfeild, some rights reserved (CC BY-NC). Photo by Tom Feild. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC). Photo by Josh Emm. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/22/2022). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/22/2022). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/22/2022). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/22/2022). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/27/2020). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/20/2020). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Harford Co., Maryland (5/25/2020). (c) Josh Emm, some rights reserved (CC BY-NC). Photo by Josh Emm. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/9/2017). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/16/2021). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/16/2021). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Kent Co., Maryland (5/22/2022). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/2/2021). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Carroll Co., Maryland (5/29/2022). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Maryland (Date obscured). (c) Jesse C., some rights reserved (CC BY-NC). Photo by Jesse C. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (4/27/2023). (c) Jane Hartman, all rights reserved. Photo by Jane Hartman. (MBP list)

Pale Yellow Iris in Charles Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)

Pale Yellow Iris in Charles Co., Maryland (4/29/2023). (c) Deborah Barber, some rights reserved (CC BY-NC). Photo by Deborah Barber via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/16/2023). (c) Jesse C., some rights reserved (CC BY-NC). Photo by Jesse C. via iNaturalist. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/19/2023). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/20/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Allegany Co., Maryland (5/23/2023). (c) ldmcoy, some rights reserved (CC BY-NC). Photo by ldmcoy via iNaturalist. (MBP list)

Pale Yellow Iris in Allegany Co., Maryland (5/23/2023). (c) ldmcoy, some rights reserved (CC BY-NC). Photo by ldmcoy via iNaturalist. (MBP list)

Pale Yellow Iris in Allegany Co., Maryland (5/23/2023). (c) ldmcoy, some rights reserved (CC BY-NC). Photo by ldmcoy via iNaturalist. (MBP list)

Pale Yellow Iris in Carroll Co., Maryland (5/27/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/22/2023). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/22/2023). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/22/2023). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/25/2023). (c) Bill Harms, some rights reserved (CC BY-NC). Photo by Bill Harms. (MBP list)

Pale Yellow Iris in Wicomico Co., Maryland (5/6/2023). (c) Cindi Fitzgerald, some rights reserved (CC BY-NC). Photo by cin579 via iNaturalist. (MBP list)

Pale Yellow Iris in Wicomico Co., Maryland (5/6/2023). (c) Cindi Fitzgerald, some rights reserved (CC BY-NC). Photo by cin579 via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (6/3/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (6/8/2023). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (Date obscured). (c) Brady O'Brien, some rights reserved (CC BY-NC). Photo by brady_obrien via iNaturalist. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (Date obscured). (c) Brady O'Brien, some rights reserved (CC BY-NC). Photo by brady_obrien via iNaturalist. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (Date obscured). (c) Brady O'Brien, some rights reserved (CC BY-NC). Photo by brady_obrien via iNaturalist. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (Date obscured). (c) Kyle Klotz, all rights reserved. Photo by Kyle Klotz. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC). Photo by Josh Emm. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/18/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/18/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/18/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/18/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/18/2021). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (6/2/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/22/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/22/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/22/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/22/2021). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY). Photo by Emily Summerbell, Ph.D. via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/10/2009). (c) Stephen John Davies, some rights reserved (CC BY-NC). Photo by Stephen John Davies via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/25/2020). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/25/2020). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/25/2020). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (5/25/2020). (c) the swamp ass, some rights reserved (CC BY). Photo by swamp ass via iNaturalist. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/10/2023). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Talbot Co., Maryland (5/13/2023). (c) Jonathan Irons, some rights reserved (CC BY-NC). Photo by Jonathan Irons via iNaturalist. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/26/2023). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Charles Co., Maryland (5/2/2021). (c) Deborah Barber, some rights reserved (CC BY-NC). Photo by Deborah Barber via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/11/2023). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore City, Maryland (5/9/2021). (c) Annie Weissman, some rights reserved (CC BY). Photo by wearethechampignons via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore City, Maryland (5/9/2021). (c) Annie Weissman, some rights reserved (CC BY). Photo by wearethechampignons via iNaturalist. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (4/25/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Baltimore Co., Maryland (4/25/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (Date obscured). (c) Jim Brighton, some rights reserved (CC BY-NC). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/27/2023). (c) Adrienne van den Beemt, some rights reserved (CC BY). Photo by Adrienne van den Beemt. (MBP list)

Pale Yellow Iris in Kent Co., Maryland (5/5/2024). (c) Cole Tiemann, some rights reserved (CC BY-NC). Photo by Cole Tiemann via iNaturalist. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/6/2024). (c) Jeff Davis, some rights reserved (CC BY-NC). Photo by Jeff Davis via iNaturalist. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (5/12/2024). (c) rageb4, some rights reserved (CC BY-NC). Photo by rageb4 via iNaturalist. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/12/2024). (c) Robert Ferraro, some rights reserved (CC BY-NC). Photo by ptbrnchbob via iNaturalist. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (Date obscured). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (Date obscured). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (Date obscured). (c) smuller, some rights reserved (CC BY-NC). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (Date obscured). (c) Jim Brighton, some rights reserved (CC BY-NC). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Wicomico Co., Maryland (5/13/2024). (c) Jonathan Irons, some rights reserved (CC BY-NC). Photo by Jonathan Irons via iNaturalist. (MBP list)

Pale Yellow Iris in Frederick Co., Maryland (5/15/2024). No rights reserved. Photo by Andy Wilson via iNaturalist. (MBP list)

Pale Yellow Iris in Dorchester Co., Maryland (5/16/2024). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2024). (c) Larry Glatt, some rights reserved (CC BY-NC). Photo by Larry Glatt via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/17/2024). (c) Larry Glatt, some rights reserved (CC BY-NC). Photo by Larry Glatt via iNaturalist. (MBP list)

Pale Yellow Iris in Wicomico Co., Maryland (5/18/2024). (c) Elaine Parker, some rights reserved (CC BY-NC). Photo by lurkershadow via iNaturalist. (MBP list)

Pale Yellow Iris in Wicomico Co., Maryland (5/18/2024). (c) Elaine Parker, some rights reserved (CC BY-NC). Photo by lurkershadow via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/16/2024). (c) Ron Wertz, some rights reserved (CC BY-NC-SA). Photo by Ron Wertz via iNaturalist. (MBP list)

Pale Yellow Iris in Worcester Co., Maryland (5/22/2024). (c) Birder20714, some rights reserved (CC BY-NC). Photo by Jim Stasz. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/22/2024). (c) Jane Hartman, all rights reserved. Photo by Jane Hartman. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/27/2024). (c) Birder20714, some rights reserved (CC BY-NC). Photo by Jim Stasz. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/27/2024). (c) martin livezey, some rights reserved (CC BY-NC). Photo by martin_livezey via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/27/2024). (c) martin livezey, some rights reserved (CC BY-NC). Photo by martin_livezey via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/27/2024). (c) martin livezey, some rights reserved (CC BY-NC). Photo by martin_livezey via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/27/2024). (c) martin livezey, some rights reserved (CC BY-NC). Photo by martin_livezey via iNaturalist. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/23/2020). (c) Jane Hartman, all rights reserved. Photo by Jane Hartman. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/23/2020). (c) Jane Hartman, all rights reserved. Photo by Jane Hartman. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (5/25/2024). (c) Jim Brighton, some rights reserved (CC BY-NC). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Allegany Co., Maryland (5/9/2024). (c) Mark Eanes, some rights reserved (CC BY). Photo by Mark Eanes. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/4/2024). (c) eproper, some rights reserved (CC BY-NC). Photo by eproper via iNaturalist. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (Date obscured). (c) johnbotany, all rights reserved. Photo by John Hall. (MBP list)

Pale Yellow Iris in Garrett Co., Maryland (6/6/2016). Photo by Kimberly Booth. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/14/2020). Photo by Bonnie Bell. (MBP list)

Pale Yellow Iris in Montgomery Co., Maryland (5/12/2020). Photo by Bonnie Bell. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/16/2017). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Howard Co., Maryland (5/22/2019). Photo by Sue Muller. (MBP list)

Pale Yellow Iris in Queen Anne's Co., Maryland (5/27/2015). Photo by Lori Byrne. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/2/2017). Photo by Maddie Koenig. (MBP list)

Pale Yellow Iris in Anne Arundel Co., Maryland (5/23/2015). Photo by Matthew Beziat. (MBP list)

Pale Yellow Iris in Wicomico Co., Maryland (4/22/2017). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Worcester Co., Maryland (5/11/2019). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Caroline Co., Maryland (5/30/2020). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Dorchester Co., Maryland (5/19/2018). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Wicomico Co., Maryland (5/13/2017). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Prince George's Co., Maryland (5/27/2017). Photo by Jim Brighton. (MBP list)

Pale Yellow Iris in Talbot Co., Maryland (5/27/2017). Photo by Jim Brighton. (MBP list)


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Use of images featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.

MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here: https://mdinvasives.org/species-of-concern/.