Iris pseudacorus

Invasive European yellow iris

Iris pseudacorus waterflag

Plant grows in the wild/spontaneouslyPlant is invasive in PA

This alien iris is the only iris that is likely to be growing in the wild.  It has escaped from our gardens and has firmly established itself in many areas of the state, becoming invasive.

Frequent in marshes, shallow water of lakes and ponds.

Scattered throughout the state.

Wetland codes
EMP: OBL
NCNE: OBL



Flowers from late May to July.

Iris pseudacorus waterflag

Plant grows in the wild/spontaneouslyPlant is invasive in PA
Iris pseudacorus gallery
Common Names
waterflag yellow iris