''Umbilicaria phaea'' is a brown, umblicate foliose lichen that grows up to 6 cm in diameter, sometimes in colonies covering large patches of desert rocks. One variety that grows in northern California is brilliant red. It is with a single 1 - 5 cm flattish leaf-like cap on top of an anchoring stem. The leaflike top is smooth with some lobes, roughly circular, thin, and brittle.
The lower surface is light gray to light brown. It has up to 2.5 mm black circular to slightly polygonal spots that.. more
Similar species: Lecanorales
Uploaded Feb 8, 2017. Captured Jan 28, 2017 11:01 in Foothill Rd, Los Molinos, CA 96055, USA.
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https://www.jungledragon.com/wildlife/browse/fungi/ascomycota/lecanoromycetes
One small suggestion to improve the sharing of your photos: please set a meaningful title, and optionally a description. It looks better in the photo, in thumbs, and there's a better chance people will find your photo if it has a good title. You can simply do this using the yellow "Edit details" button. Hope this helps. Posted 7 years ago