Arnica alpina subsp. lonchophylla (Greene) G.W.Douglas & Ruyle-Dougl. accepted as Arnica lonchophylla Greene (original description)
Arnica angustifolia subsp. attenuata (Greene) G.W.Douglas & Ruyle-Dougl. accepted as Arnica angustifolia subsp. angustifolia Vahl (original description)
Arnica angustifolia subsp. lonchophylla (Greene) G.W.Douglas & Ruyle-Dougl. accepted as Arnica lonchophylla Greene (original description)
Arnica fulgens var. sororia (Greene) G.W.Douglas & Ruyle-Dougl. accepted as Arnica sororia Greene (original description)
Chrysopsis godfreyi Semple (original description)
Chrysopsis godfreyi f. viridis Semple (original description)
Senecio pauperculus subsp. crawfordii (Britton) G.W.Douglas & Ruyle-Dougl. (original description)