It has two flowers, which come in variable shades from yellow, white, lilac, blue and violet.

[2][4][5] The stem has carinated (ridged or keeled) spathes (leaves of the flower bud).

[2][6][7] The flower also can very rarely be pale yellow with violet veins, similar (but less than) to Iris variegata.

[4] After the iris has flowered, it produces an ovoid,[3] or obovate,(which is triangular in section), seed capsule.

[4] In 2012, a study was carried out on 4 diploid and 7 allopolyploid bearded Iris species.

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

[5][7][8] On 1 April 1992, specimens were found in the Italian region of Apulia, between the towns of Apricena and Sanniandro Garganico.

These have been used as a holotype (single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon)) of Iris bicapitata.

[18][19] Previously, specimens that have been found in the region, were classified as Iris lutescens, which also grows elsewhere in Italy (including near Lazio and Toscana).

[19] It is listed in the Encyclopedia of Life,[20] but Iris bicapitata is not yet a name accepted by the RHS, as of 16 September 2015.

[18][19] It is found in Italy,[18] in Apulia,[2][3][21] including within the Gargano Peninsula,[16][22] and the near the town of Monte St Angelo.

[10] It grows on open sunny slopes,[2][5] or in meadows and between (sparsely spaced) shrubs,[3] on a limestone,[3][5] (or calcareous substrate).

[2][5] It is hardy to USDA Zone 9,[9] It probably can tolerate more than −15 °C, but in its habitat (Italy), the winters are normally not colder than −10 °C.

[2] Like many other irises, most parts of the plant are poisonous (rhizome and leaves), and if mistakenly ingested can cause stomach pains and vomiting.