Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

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Arnica is a boreal, arctic, and alpine genus, in North America confined to the far north and higher elevations of the west. Our two species are restricted to the Lake Superior region and are rare and local (though A. cordifolia may locally form extensive vegetative colonies.


1. Lower leaves cordate.

A. cordifolia

1. Lower leaves lanceolate to narrowly ovate.

A. lonchophylla

All species found in Arnica

Arnica cordifoliaHEART-LEAVED ARNICA 
Arnica lonchophyllaLONGLEAF ARNICA 


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 1, 2023.