| Family | Asteraceae (alt. Compositae) |
| Scientific name | Ligularia japonica (Thunberg) Lessing |
| Synonyms | Arnica japonica Thunberg; Ligularia palmatifida (Siebold & Zuccarini) Nakai; Senecio japonicus (Thunberg) Schultz Bipontinus |
| Common name | (Japanese common name) hankai-sou [Fan Hui weed (Fan Hui is a famous warrior in ancient China)] |
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Shizuoka Prefecture), Shikoku, Kyushu |
| (Other nations) Korea, China, Taiwan | |
| Chromosomal number | 2n=60 |
| Description | Plants electing 70-150cm tall. Leaves 35cm long. Flowers yellow ca. 10cm, flowering in June to August. Perennial plants. |
| Reference | Ligularia japonica (Thunb.) Less. |
| Gynura japonica (Thunb.) Juel | |
| Gynura japonica Juel. | |
| Senecio pinnatifidus (P.J.Bergius) Less. | |
| An Enureration of Compositae of Formosa | |
| Note | Gynura japonica (Thunberg) Juel (syn. Cacalia pinnatifida sensu Loureiro, non P. J. Bergius; Gynura flava Hayata; Gynura japonica (Thunberg) Juel var. flava (Hayata) Kitamura; Gynura pinnatifida Vaniot; Porophyllum japonicum (Thunberg) de Candolle; Senecio japonicus Thunberg) is not a synonym of Ligularia japonica (Thunberg) Lessing. |
| June 2008 at Kyoto Botanical Garden |
June 2008 at Kyoto Botanical Garden |
June 2008 at Kyoto Botanical Garden |