Please do not re-click a link while waiting for a page to load. (It’s slower and degrades site speed for all users.)
To get images for machine learning, see MO Images for Machine Learning


When: 2021-07-31

Collection location: Joshua Tree National Park, California, USA [Click for map]

Who: Cindy Trubovitz (Trubo)

No specimen available

Apothecia raised, thick-walled. Considered C. citrina but I think color may exclude this species (also can’t see obvious soredia from photo).


Proposed Names

46% (2)
Used references: Lichens of North America, Field Guide to CA Lichen

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
Good idea, considering C. citrina
By: Jason Hollinger (jason)
2021-08-04 11:25:29 MST (-0700)

I always forget. But yes, you really do need to check the spores to be certain. Some percentage of specimens always turn out to surprise me with their citriform spores. I don’t think C. citrina has soredia. My experience is that they essentially look exactly like C. rosulans, perhaps a bit yellower or less orange? Make @J-Dar has better experience in southern California and can give better tips for guessing without microscopy.