Twin-flowered Iris (Iris bicapitata) usually blue-violet but also in yellow, white and lilac, Found above 600m elevation where it is an endemic of the Gargano peninsula and some other parts of Puglia in Italy.

For a long time this species was thought to be Iris lutescens (syn chamaeiris) which instead occurs on the other side of Italy. (Lazio, Toscana) However it is now recognised as botanically different and distinct.

It is a more robust species, with a distinct stem (up to 40 cm in cultivation) bearing two flowers at the head of each stem – hence the specific name. In comparison, Iris lutescens (as well as the other Apulian endemic Iris pseudopumila) bears only one flower, without a stem, (the floral tube acts as a stem).

This species has a pleasant scent, with notes of roses and violets