This species is native to Honshu
Japan and was first
Maekawa in 1935. It forms a small size mound about 10 inches tall by 30 inches wide and
has average substance to the leaves. The leaves are chartreuse green, elliptical
and ovate in shape with a sharp point at the tip. It bears white flowers with
purple anthers from June into July.
Mark Zilis' Field Guide to Hostas (2014)
states that this species was found in Japan in "...in rocks
An article by
Hajime Sugata of Japan in
Hosta Journal (1994 Vol. 25 No. 2) states that "The
natural habitat of H. kiyosumiensis is similar to
that of H. longipes,
but, H. kiyosumiensis grows closer to water than
H. longipes. It loves wet rocks or water-dripping
cliffs along river valleys. Rocky rivers are seen
running nearby: Tomoe River in Toyota City and Asuke
Town, Kansa River in Shitara Town, and Oto River in
Okazaki City and Nukata Town. Those rivers are wide and
the woodland reaches to the edge of the rivers; wet
rocks, therefore, and cliffs provide an ideal habitat
for H. kiyosumiensis.
Regionally modified forms are rare, such as a
yellow-centered variegated one called 'Busen'
and a white-streaked one in upper Oto River. A
white-flower one with a green stem (chlorophyll color
only) is found."