It is found in Turkey, and within south-eastern Europe, in Greece, and Aegean Islands, (Lesbos and Samos).

It is found in Greece near Alexandropoulos and within Turkey, east to Kayseri.

It was once found by Pierre Edmond Boissier in the marshes to the west of Smyrna, in Greece.

One reference mentions Syria, but this may mean a cultivated region not native.

It has been naturalized in California, Connecticut, Missouri (in the USA), along roadsides, and in old farms in Southern Italy, and in Yugoslavia.

It has also naturalized in the UK, found on the edges of woodlands and in grasslands of the New Forest and around Abbotsbury in Dorset.

The rivers of the Balkans are known for a diverse range of plants including Iris orientalis in Evros River delta.
It is found in Turkey, and within south-eastern Europe, in Greece, and Aegean Islands, (Lesbos and Samos).
It is found in Greece near Alexandropoulos and within Turkey, east to Kayseri.
It was once found by Pierre Edmond Boissier in the marshes to the west of Smyrna, in Greece.
One reference mentions Syria, but this may mean a cultivated region not native.
It has been naturalized in California, Connecticut, Missouri (in the USA), along roadsides, and in old farms in Southern Italy, and in Yugoslavia.
It has also naturalized in the UK, found on the edges of woodlands and in grasslands of the New Forest and around Abbotsbury in Dorset.
The rivers of the Balkans are known for a diverse range of plants including Iris orientalis in Evros River delta.
Iris orientalis