Arnica rydbergii, June 29, 2022
Common & scientific name
Rydberg’s arnica, Arnica rydbergii
Family
Sunflower, Asteraceae
Location
Linkins Lake Trail, 11,800’
Fun, weird, helpful, or little known fact
This Arnica can be distinguished from the other half-dozen hard-to-tell-apart Arnicas by its location (likes treeline and dry slopes), single flower on top (unlike A. mollis which usually has three—a rare instance where Bill Weber got it wrong), usually smaller than A. latifolia, and as it ages the tips of its petals whiten (see photo to come).