Iris tenax lime While the colour difference is

While the colour difference is easy to see

A South American rhizomatous plant

limestone or any soils/sand

Looking closely (or at the next image) you can see the larger phlox in white laid on top

Solitary white tp pinkish flowers when you are lucky

Iris tenax lime While the colour difference isSlow spreading evergreen, very attractive flowers and easy growing. Toughleaf Iris is a slowly spreading rhizomatous evergreen perennial forming large, attractive clumps of tough, grass like leaves. Purple and white but variations in color. Very handsome and undemanding, Great for rockeries, along the edge of gravel paths, or the front of the border, meadows. Drought tolerant once established. 40cm