This is a very cool Iris!! Expect to see this plant offered more frequently in our plant sales. This plant can tolerate a good deal of shade but also sun. It has broad sword like foliage, typical of Iris, and huge blue/purple flowers in spring that can reach 6" across. It gets its common name because it was grown on thatch roofs in China and Japan. And just like that the shingles on your roof are much more boring than they were before reading this!