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On old redwood fence board from a long ago abandoned ranch corral, in dry grassland setting with planted eucalyptus and pines.

Thallus light grey, thick. Apothecia abundant, often crowded, with black disks.

Micro and chemistry to come. And maybe some decent photos.

Species Lists


Perethecia cross-section under dissecting scope
Spore, globose, +/-22µm diameter

Proposed Names

-28% (1)
Recognized by sight
-57% (1)
Recognized by sight: 1-septate, brown, broadly ellipsoid spores

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= Observer’s choice
= Current consensus


Add Comment
By: J-Dar
2016-04-10 10:16:26 MST (-0700)

As you can see from my previous comments I struggled with this one. I have a handful of Thelomma occidentale specimens and this just looked weird, I didn’t even think it was anything close to Thelomma or Cyphelium, then I hit those spores and saw Cyphelium spore photos that were similar, and threw up the Cyphelium vote without even considering Thelomma. Thanks.

I think you should consider Thelomma for this
By: Jason Hollinger (jason)
2016-04-10 10:01:24 MST (-0700)

The difference between Thelomma and Cyphelium is the color of the lateral exciple: it is black in Cyphelium. Yours looks like Thelomma instead.

Going with Cyphelium…
By: J-Dar
2016-04-01 21:38:30 MST (-0700)

Maybe apothecia deformed or parasitized or something. But the spores are right, when considered 1-septate, brown, broadly ellipsoid.

Typical green Cyphelium tigillare also occurs at this location.

Some lichenicolous fungi parasites also have spores like this (Arthonia, Endococcus…), so there could be something like that going on. Weird. I need to check a “normal” Cyphelium and compare.

Photos Added, Chemistry updated, some micro
By: J-Dar
2016-03-31 20:00:53 MST (-0700)

Thallus is K-, C-, KC-.

Spores single celled, globose, dark brown, roughly 15-22µm in diameter, maybe 6 or so per ascus (I swear #/ascus is the hardest feature for me to see/photograph). Spores often seemed stuck together so that they appeared 1-septate, which was my first description (1-septate, ellipsoid). But then there were obvious ones that separated into single globose cells. Maybe I split them when I pressed on the slip cover?

Perethecia flask shaped. Exciple dark around the base of the perethecia. Filamentous hyphae were common in the upper exciple. Involucrellum? The algae filled margin encloses the “shoulders” of the perethecia, not sure if there was an involucrellum over the shoulders.

I’m afraid I didn’t get anywhere with the pyrenocarp key in the new Brodo NA Lichens key to genera (D). Verrucaria?