When: 2008-10-21

Collection location: Larch Mountain, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

I may have found this in Brodo, but didn’t mark the page, and have lost it. Crustose lichen, with raised blue/black fruiting structures on a mostly gray-green background.


Proposed Names

40% (2)
Recognized by sight
70% (1)
Recognized by sight: Thallus light grayish, thick, verruculose; apothecia shiny, black, hemispherical, without margins; on bark; there is a small bright-red zone just below the apothecium (luckily, there is a broken apothecium in the top right quadrant of the photograph!)
Used references: ‘Lichens of North America’ has an excellent pair of photographs of this species (Brodo et al. 2001)

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= Observer’s choice
= Current consensus


Add Comment
It may be
By: Daniel B. Wheeler (Tuberale)
2008-10-24 23:52:19 PDT (-0700)

that I’m seeing things. But when I enlarge the photo, I see small protrusions, like warts on Tuber melanosporum extending outward from this specimen. But I take your point, Jason: I need to become better at Lichen identification. I’m trying, but I’m a slow learner.

Brodo’s crusts are far from complete
By: Jason Hollinger (jason)
2008-10-24 13:48:49 PDT (-0700)

Part of the problem is it’s simply not known how many species of things like Bacidia, say, are even out there. Nash’s flora claims there are anywhere from 50 to 100 species worldwide — what’s a factor of two among friends? I stand by my two suggestions until a microscopist proves otherwise — both Bacidia and Micarea often have very convex apothecia like yours — circumstantial but there it is…

Tried both in Brodo. No go.
By: Daniel B. Wheeler (Tuberale)
2008-10-24 03:20:42 PDT (-0700)

BTW, growing on a tree trunk, which I didn’t include in the original observation.

I’d start with Micarea
By: Jason Hollinger (jason)
2008-10-23 13:52:54 PDT (-0700)

Or maybe Bacidia. Despite being obviously black, I’ll bet these are biatorine. Only way to tell anything for sure is to do a section and look at where the pigment comes from and what the spores are like. According to the Esslinger Checklist for North America, there are something like 70 diverse genera of crusts with lecideine or biatorine apothecia! :)