Star Rosette Lichen

Physcia stellaris

Star Rosette Lichen forms tidy gray foliose rosettes marked by distinctive white-rimmed apothecia, giving the thallus a subtle starburst pattern. These pale, elevated rims sharply contrast with the darker disc at the center, making P. stellaris one of the most easily recognized bark-dwelling Physcia species. Its lobes are small, rounded, and slightly pruinose, giving the thallus a soft, frosted appearance.

For identification details and comparison with other similar species, see the Physcia stellaris in the Field Notes section.

Star Rosette with Candleflame Contrast
Pale gray rosettes encircle a bright patch of Candleflame in the bark’s natural hollow.
Camera: Canon EOS 5D Mk IV
Lens: EF100mm f/2.8L Macro IS USM
Settings: ISO 200 • Aperture f/9.0 • Shutter 1/2 s
E21A8059–8071 • Size: 6720×4480

Star Rosette with Candleflame and Powdery Companions
Crisp gray Star Rosettes rising over Candleflame, framed by pale blue clusters of Powdery Shield.
Camera: Canon EOS 5D Mk IV
Lens: EF100mm f/2.8L Macro IS USM
Settings: ISO 200 • Aperture f/9.0 • Shutter 1/2 s
E21A8072-8081 • Size: 6720x4480