| Family | Berberidaceae |
| Subfamily | Berberidoideae |
| Tribe | Berberideae |
| Subtribe | Berberidinae |
| Scientific name | Ranzania japonica (T. Itô ex Maximovicz) T. Itô |
| Synonyms | Podophyllum japonicum T. Itô ex Maximovicz |
| Common name | (Japanese common name) togakushi-shouma (トガクシショウマ, 戸隠升麻 [meaning: Mt. Togakushi shouma (shouma = a traditional Chinese medicine)]), togakushi-sou (トガクシソウ, 戸隠草 [meaning: Mt. Togakushi weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (mainly Central region) |
| (Other nations) none | |
| Habitat | Subalpine or mountane forest |
| Chromosomal number | 2n=14 |
| Description | Plants ca. 30-50cm tall. Leaves ternate, leaflets each 8-12cm long, 7-10cm wide. Flowers pale purple ca. 2.5cm across, flowering in June. Perennial plants. |
| Reference | Ranzania japonica (T. Itô ex Maxim.) T. Itô |
| Note | Rare species. Endemic to Japan. |
| April 2008 at Rokko Alpine Botanical Garden |
April 2008 at Rokko Alpine Botanical Garden |
April 2008 at Rokko Alpine Botanical Garden |
| April 2008 at Rokko Alpine Botanical Garden |