⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Arnica montana in version 1.1 of The Plant List.
This name is a synonym of Arnica angustifolia .
The record derives from Tropicos which reports it as a synonym (record 50130861
) with original publication details: Fl. Bor.-Amer. 1: 330 330 1834.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:20046-2
.