Yellow Flag Iris



Hazard Information

Route: Ingestion     Plant Part: Leaves and Green berries

Scale: Low-Med

Vomiting, diarrhoea, weakness. Extreme cases by stomach contents not being removed, leads to unconsciousness, coma and death.


Common Name(s)

Yellow Flag Iris

Latin Name

Iris Pseudacorus


Green sword-like leaves, the flowers are deep yellow which proceed from a sheath type bract, the parts of the flower are in threes. The petals are curved, erect towards the centre of the flower.


All the plant is poisonous and can cause skin allergies. The leaves if handled can be sharp edged and cut the skin.


Severe vomiting and diarrhoea if eaten. The sap can cause blistering or irritation of the skin. The leaves can cut if handled.

Flowering Period

May to August.


Riverbanks, ditches, lakes, ponds and any swampy type marshland.