no clue what this is… teeth / spines growing on the bottom of black leaves, grabbing onto moss and debris


Proposed Names

20% (3)
Recognized by sight
91% (2)
Recognized by sight: Most common widespread Peltigera in California, and is the one with the longest spikes
Used references: California Lichens

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= Observer’s choice
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Good photo of the veins and rhizines characteristic of P. membranacea
By: Jason Hollinger (jason)
2017-03-14 23:32:52 CDT (-0500)
not a leaf..
By: John W. (SierraNevadaShrooms)
2017-03-14 23:18:40 CDT (-0500)

so it is not growing on the underside of a leaf, but it is the “leaf” itself.. interesting.