Iris grant-duffii is a species in the genus Iris, it is also in the subgenus of Limniris and in the Iris series Syriacae. It is a rhizomatous perennial. It has the common name of Grant Duff's Iris and 'Jaffa Iris'. It has the Hebrew name of איריס הביצות. Which is "Irus ha-bitzot" - the swamp iris, which comes from its native habitat of marshy areas. It was published by Baker in his book Handbook of the Irideae (Aug-Nov 1892). Specimens can be found in the botanical garden of Tel Aviv University, Museum National D'historie Natrelle, and The Hebrew University of Jerusalem.