Environmental weed in Vic. Sleeper weed in other parts of southern Australia.
http://keyserver.lucidcentral.org/weeds/data/media/Html/iris_pseudacorus.htm
Iris pseudacorus is listed in the following regions:
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Blue Gum Point to Attunga Bay Commonwealth & Kings Parks Fadden Hills Pond Hughes Garran Woodland Isabella Pond Jerrabomberra Wetlands Lake Burley Griffin West Mount Ainslie to Black Mountain Point Hut Pond QPRC LGA Red Hill to Yarralumla Creek Tuggeranong Creek to Monash GrasslandPlaces
Acton, ACT Downer, ACT Fadden, ACT Fyshwick, ACT Gordon, ACT Hackett, ACT Hughes, ACT Jerrabomberra, NSW Monash, ACT Parkes, ACT Wamboin, NSW Yarralumla, ACT