It has long arching mid-green leaves, thin stem and spring flowers in shades of blue.

[2] The leaves start as 1.5–3 cm wide at the base of the plant,[2][3] and appear at the end of the flowering time.

[2] They are arching,[3] scattered, lance-shaped, channeled, mid green in colour,[4] with a white margin.

Each fall has a darker blue apex and a yellow (or white)[7] stain or crest in the centre.

The standards are deflexed, pale blue with a night-blue band in the centre,[5] and 1–2 cm long.

[8] But I. warleyensis seeds have a conspicuous cream coloured seam (known as a 'raphe') all the way down one side from top to bottom.

[9] It was found in Bokhara in Eastern Turkestan in 1899, by a plant collector on behalf of the Van Tubergen nurseries in Haarlem, the Netherlands.