Native to Japan, Kuril Is., Sakhalin (source: POWO). Flora of the World documents 2 occurrences across 1 country.
Location
Japan, Honshu, Niigata (Shinano, Kamiminochi, Nojiri)
36.848667, 138.137194
Location Remarks
Myoko-Togakushi Renzan National Park. Suginosawa. Road 280 (on Google Maps) east to parking for trail to Naena-taki (waterfall). 785 m elev.
Collectors
David E. Boufford, Christopher Davidson, Sharon R. Christoph
Notes
Deciduous forest along the stream and the slopes above.
Location
Japan, Honshu, Niigata (Shinano, Kamiminochi, Nojiri)
36.848667, 138.137194
Location Remarks
Myoko-Togakushi Renzan National Park. Suginosawa. Road 280 (on Google Maps) east to parking for trail to Naena-taki (waterfall). 785 m elev.
Collectors
David E. Boufford, Christopher Davidson, Sharon R. Christoph
Notes
Deciduous forest along a small stream and up the steep canyon slope.