It is a subspecies of Iris spuria, a rhizomatous perennial plant, from the Caucasus region, with blue-violet flowers.

It has stiff, dark green leaves that can grow up to between 60–90 cm (24–35 in) long.

[6][7][8] It has dark green, compact, slightly inflated, spathes (leaves of the flower bud).

[11] The narrow falls have blade that is the shorter than the claw (section of petal closest to the stem).

[2][6][9] The capsules and seeds produced by the plant after flowering, have not been generally described.

As most irises are diploid, having two sets of chromosomes, this can be used to identify hybrids and classification of groupings.

[2] It is unknown what the Latin specific epithet demetrii refers to, but an insect (beetle) Chioneosoma demetrii, also shares the same epithet.

[17] It was originally published and described by Agazi Asaturovich Achverdov and Nina Vasilevna Mirzoeva as Iris demetrii in Transactions of Bot.

[24] Similar to Iris notha it grows on dry slopes,[5] on the foothills and mountains of Azerbaijan,[3][6] and Armenia.

[24] Due to the wide distribution of the species within Armenia, has helped protect the plants survive various threats, including being picked for flower bouquets.

[3] It also prefers positions in full sun or part shade.

[3] Due to its habit of liking dry soils, it is of interest to iris plant breeders.