This cultivar is a form of H. longipes discovered in Japan. This is a small to medium size (6 to 10 inches high with a spread of 8 to 12 inches) hosta. The leaves are very shiny underneath, slightly wavy and have heart shaped bases. It has dense clusters of pale purple flowers with purple anthers borne on 20 to 30 inch scapes in August into September.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term iwa as rock, Iwa Gibōshi or H. longipes and the term midori as green.