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General: Iris Family (Iridaceae). The native irises are perennial herbs, usually evergreen and growing from a creeping, tuberous rhizome. Irises can be identified by their double row of leaves, which overlap like praying hands. The leaves are long and linear with parallel venation. Flower stems are erect and simple. Blossoms vary somewhat in spacing of the parts, width of sepals, and the inner, erect standards (petals). Iris douglasiana has pale cream to light, dark lavender or deep reddish purple flowers that bloom from May to June.