Iris delavayi is a species in the genus Iris, also the subgenus of Limniris and in the Iris series Sibiricae. It is a rhizomatous herbaceous perennial, from various provinces in China. It has grey-green leaves, long hollow stem, and 2 flowers in various blue shades. From dark violet, dark purple, purple-blue, dark blue to light purple. It is cultivated as an ornamental plant in temperate regions.