size (7 inches high by 13 inches wide), rapid growing medium green
hosta originated in
(or Korea) and was registered by
Peter Ruh of Ohio in 2002
with new data in
2018. The foliage is
lanceolate, wavy, slightly twisted, dull on top and very shiny on
the bottom.. It produces
medium purple flowers with stripes in late August on scapes up
to 19 inches tall.
The registration materials state: "...small size; rapid growth;
attractive flower; historic background...Introducer:
Alex Summers...Originating in Korea and/or Japan..."
The Hosta Handbook by Mark Zilis (2000), "It could be related to either
H. sieboldii angustifolia or be a separate species."
The Hostapedia by
Mark Zilis (2009), states that this cultivar "...may
be the most well-known dwarf-size hosta cultivar. It makes a
neat, low mound of foliage that is useful as an edger, low
ground cover, or in troughs."
The Book of Little Hostas by
Kathy and Michael Shadrack
(2010) says: "Ideal for the border and raised bed, but smaller
divisions make very good trough and rockery plants."
The New Encyclopedia of Hostas by
Grenfell (2009) states: "...fertile although the flowers do not open
properly...Fast growing...Sometimes re-blooming
occurs...Distinctly rippled edges which take time to develop."
Jima Giboshi, the "hosta from Saishu Island," is named for
an island 80 miles off the southern tip of the Korean
Peninsula...Of recent volcanic origin, it has yielded many
uncommon species, including H. venusta. The clone most
frequently available in commerce under this name is a small
all-green form of H. sieboldii. This name is also used
for several other taxa, and the name H. 'Saishu Jima' as
applied in commerce, is technically not a clonal name...Hosta
gracillima is also sold under this name."