| Name | Petasites japonicus (Siebold & Zuccarini) Maximowicz |
| Authorship | (Siebold & Zuccarini) Maximowicz |
| Rank | Species |
| Placed in | Petasites Miller |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Petasites japonicus (Siebold & Zuccarini) Maximowicz |
| Identification made in | [no date] (3) |
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