Iris longipetala is a species in the genus Iris, it is also in the subgenus Limniris and in the series Longipetalae. It is a rhizomatous perennial, from North America. It has dark green or bluish green, grass-like leaves, small stem and 3–8 flowers, that range from creamy-white, pale blue to lavender blue. It is cultivated as an ornamental plant in temperate regions.

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