This is a form of H. longipes which is a non-registered
Japan. It forms a medium size (15 inches high by
32 inches wide) clump of dark green foliage with intense white
bloom on the bottom of the leaf. The leaves have purple-red dots
on the petioles, smooth texture, are moderately rippled and have
thick substance. Purple flowers bloom in September.
An article about name changes by W. George Schmid in
Hosta Journal (1996 Vol. 27 No. 2) states that, "The
Latin name of the species may be omitted, because the cultivar name already
includes the vernacular Japanese name of the species. Thus,
H. pycnophylla 'Ogon
Setouchi' may be abbreviated to H. 'Ogon Setouchi' or H. longipes 'Urajiro Iwa'
may be shortened to H. 'Urajiro Iwa'..."