I drew this etude from nature in Botanical garden of Hohenheim University in Stuttgart.

In my opinion, Irises are one of the most picturesque flowers. A lot of artists appealed to Irises in their works. And of course, I could not resist to its magical grace.

This etude I made in alla prima technique, applying freer wide strokes of the brush. I tried to depict the play of lights and shadows on the petals. The sun generously lighted the flowers, and gave a contrast with deep green leafs and saturated yellow.
I applied lemon yellow and yellow ochre in the lights and earth brown with emerald green in the shadows.
Also, I used the white ground of canvas to picture overtones and to highlight the silhouette of irises.