Primarily found in cold temperate climates, primarily on open rock and occasionally in forested areas
Widely distributed in the Northern hemisphere
This species is
to the Truckee Meadows.
Powder-tipped rosettes are a type of common lichen. Lichens are complex organisms that arise from symbiotic relationships between fungi and a photosynthesizer, like algae. The genus name, Physcia, means “inflated” or “sausage-like,” which is used to describe the physical form the various species within the genus take. The powder-tipped rosette generally appears in shades of gray, with a whitish-gray upper and a distinctly darker gray on the ends of the lobes.
The powder-tipped rosette is commonly misidentified for a couple other lichens that all appear very similar, initially. The hooded rosette lichen, hooded tube lichen, and star rosette lichen share several features in terms of color and branching!
iNaturalist, Powder-tipped Rosette, May 2021, https://inaturalist.ala.org.au/taxa/228044-Physcia-dubia
Wildflower Search, Physcia Dubia, May 2021, https://wildflowersearch.org/search?&tsn=14026
iNaturalist, Rosette Lichens, May 2021, https://inaturalist.nz/taxa/117887-Physcia
Consortium of North American Lichen Herbaria, Physcia Dubia, May 2021, https://lichenportal.org/cnalh/taxa/index.php?taxon=55121&clid=1037
NatureServe, Physcia Dubia, May 2021, https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.123549/Physcia_dubia
Image: Andrew Khistun, https://mushroomobserver.org/image/show_image/201136?obs=88246, license https://creativecommons.org/licenses/by-sa/3.0/, cropped from original.
Taylor Gardner (research & content)
Alex Shahbazi (edits & page design)