H. nigrescens in
its background this cultivar has been around for a long time in
Japan. It was registered by
Peter Ruh of Ohio in 2002. A semi-upright mound, it grows
into a giant size hosta about
28 inches high and 5 feet wide. The foliage is cupped,
moderately corrugated and has thick substance. It bears lavender
The Hostapedia by Mark Zilis (2009), this cultivar is "...named for the Tenryu River
Japan) that is the same as or a seedling of
W. George Schmid in his
Hosta Species Update on The Hosta
Library (2007) says, "H. nigrescens...and
H. ‘Tenryu’ are morphologically the same.
There are slight differences in the flower color, H. ‘Tenryu’ has white
flowers shading to a very light mauve with barely darker stripes, while H.
nigrescens has almost white flowers. The anthers of both are bi-color
purple. In this Species Update they are considered the same."