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


Very common in southern California, it seems. Distinguished by heavily pruinose, whitish to greyish to brownish, conspicuously squarrose black rhizines, and most importantly, coarse soredia along margins, becoming confluent in center of old thalli, especially in dry situations.


Proposed Names

87% (1)
Used references: Nash’s Sonoran Flora

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

= Observer’s choice
= Current consensus


Add Comment
No one has commented yet.