Taxonomy of Two Blue-Flowered Juno Irises (<i>Iris</i>Subgen.<i>Scorpiris</i>, Iridaceae) from the Western Tian-Shan

The taxonomic applications of two species names of Iris subgen. Scorpiris, I. albomarginata R.C. Foster and I. willmottiana Foster, are clarified. These species are confirmed to be taxonomically separate, and they are redescribed and mapped for the first time. Both species are endemic to the Western Tian-Shan. Iris albomarginata has evenly pale-blue flowers and occurs in the Ugam and Pskem Ranges (Uzbekistan, Kazakhstan), whereas I. willmottiana has blue flowers with white-blotched blades of the outer segments of the perianth and occurs in the Karatau and Boralday Ranges, and also in the northern part of the Talas Range (Kazakhstan, Kyrgyzstan). Iris willmottiana is reported as new to Kyrgyzstan. An identification key for blue-flowered juno irises of the Western Tian-Shan is provided.

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