This is a form of the species H. longipes latifolia from Japan. It becomes a medium size mound that grows to about 17 inches in height and 42 inches wide. The leaves are slightly puckered at the base, are lightly rippled and have a long, curved tip. The petioles are purplish red and the flowers which bloom in September are medium purple.

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 ogon or oogon as gold or yellow.