This is a Subgenus in the Genus Iris. The plants are characterized by a small growing tip atop a long tap root, and crested flowers which provides some confusion with the Section Lophiris.
The BIS Species Guide includes the following species Iris barbatula, Iris collettii, Iris decora, Iris leptophylla???, Iris staintonii. Mathew and Zhao include Iris latistyla, and Zhao includes Iris subdichotoma.
-- Main.RPries - 2010-02-03