⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record gcc-67107, with some changes.

Arnica angustifolia subsp. attenuata (Greene) is a synonym of Arnica angustifolia subsp. angustifolia Vahl

The record derives from TICA which reports it as a synonym (record 50D2FA1C-52F0-4DB0-87B5-D436C7C78771) with original publication details: Canad. J. Bot. 56 1710 1978.