When: 2017-02-13

Collection location: Round Valley Regional Preserve, Contra Costa Co., California, USA [Click for map]

Who: Pgrunow

No specimen available


Proposed Names

2% (2)
Recognized by sight
61% (2)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
For this purpose, “coastal”
By: Jason Hollinger (jason)
2017-02-13 21:12:04 PST (-0800)

Granted I’m not personally convinced L. argentea and L. gangaleoides are different species, but apparently L. argentea doesn’t start to show up until you get high in the Sierras or head north in the mountains. I’ve even seen specimens with green epihymenium around Lake Tahoe. (L. argentea has brown epihymenium and subtly different chemistry requiring TLC to see.)

Okay, this spot is well away from the coast, by the way.
By: Pgrunow
2017-02-13 21:00:50 PST (-0800)

At the east end of the Diablo Range, so all of the pictures from this date are close to the San Joaquin valley/delta. Pretty different climate. Gets some fog here, but not a whole lot of it. The rocks were very colorful with lichens. Wonderful hiking area.

There are other candidates, too
By: Jason Hollinger (jason)
2017-02-13 20:53:55 PST (-0800)

Like Lecanora argentea, also with black apothecia and thick bumpy white thallus, but this is most likely on the coast. [It should have a green epihymenium.]

Oh wow! Thank you!
By: Pgrunow
2017-02-13 20:46:33 PST (-0800)