Observation 67987: Lichen P. Micheli

When: 2011-05-23

Collection location: Old Bridge North of Solano Park Circle, Davis, California, USA [Click for map]

Who: Byrain

No specimen available

Growing on a stone bridge with several other lichen species and moss. A creek regularly visited by waterfowl and other animals runs underneath it.


I attempted to adjust the colors to memory and this is the result.

Proposed Names

28% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
If it’s Aspicilia…
By: Brendan Hodkinson (brendanhod)
2011-07-31 03:32:10 CDT (-0400)

you should at least find a few areoles that have small dark depressions in the centers. This is where the fungal reproductive parts are found. Like with most lichen groups, spore size/shape and the standard chemical spot test results are probably the best features to focus on. There are many species in the genus (over 60 in North America, at least 15 confirmed for California).

I’ve been meaning to…
By: Byrain
2011-07-31 00:57:20 CDT (-0400)

…take better pictures of this one now that I have a tripod, what chemical/microscopic features may help narrow this down?

By: Brendan Hodkinson (brendanhod)
2011-07-30 23:43:59 CDT (-0400)

Aspicilia would be my inclination.

no clue!
By: Jason Hollinger (jason)
2011-05-23 23:19:45 CDT (-0400)

I can’t find apothecia, perithecia, soredia, anything.

Created: 2011-05-23 22:38:26 CDT (-0400)
Last modified: 2011-05-23 22:38:27 CDT (-0400)
Viewed: 59 times, last viewed: 2020-06-02 00:57:09 CDT (-0400)
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