⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-25239, with some changes.
This name is a synonym of Petasites japonicus subsp. giganteus F.Schmidt ex Kitam..
The record derives from TICA which reports it as a synonym (record 9BD6A1DC-0963-4E48-9FC7-2E989BD1A5B7) with original publication details: 115 1932.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:237348-1.