Iris series Californicae are a series of the genus Iris, in Iris subg. Limniris. They are commonly known as Pacific Coast iris (PCI), or Pacific Coast natives (PCN).
The series was first classified by Diels in ' (Edited by H. G. A. Engler and K. Prantl) in 1930. It was further expanded by Lawrence in 'Gentes Herb' (written in Dutch) in 1953.
They all possess thin wiry, rhizomes and roots. They also have narrow, long evergreen leaves. They have been used to create various hybrids, mostly in America.