Iris x robusta "Gerald Darby' Tobeprop But I think this is

But I think this is the Chilean one

and you must let it set seed as it is a biennial

They have a tall stem topped with a spray of up to 25 blue/mauve flowers

Excellent for meadow looks and the border or gravel and sand gardens

Ideal as a ground cover and for rock gardens

Iris x robusta "Gerald Darby' Tobeprop But I think this isPurple points, leaves, buds and flowers! A must have in any garden. Purple tinted new leaves burst forth in spring when little else perennial is interesting, the leaves continue to be dark hued until the flower buds emerge which take over as gorgeous dark stems and buds which give interest well before flowering. Pale blue purple flowers in summer are attractively patterned. Hardy and resilient. Best in full sun or part shade, in acidic, moist to wet,