Observation 103598: Arthonia albopulverea Nyl.

When: 2012-01-18

Collection location: Secret Cove, Palos Verdes, Los Angeles Co., California, USA [Click for map]

33.74° -118.373° 71m

Who: Jason Hollinger (jason)

Specimen available

HABITAT grove on top of hill overlooking sea; SUBSTRATE limb of pine; ASPECT shaded; NOTES very thing white stain, irregular star-shaped flush black apothecia, epihymenium gray-brown-black unchanging in K, asci balloon-shaped with plug that fills nearly entire cavity and tip in K, medulla I+r KI+b strong; SPORES 8-9 × 3.5 µm, septae?.


At 30x, stacked.

Proposed Names

-29% (1)
Recognized by sight
87% (1)
Eye3 Eyes3
Used references: det. by K. Knudsen

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I don’t think this one was lichenized
By: Jason Hollinger (jason)
2012-08-07 20:56:58 UTC (+0000)

The unlichenized Arthonia rarely give up any spores in my experience. They’re a real pain in the butt. :) Some places Arthonia are hard to see, but in this location, they were fairly covering the trunks of smooth-barked shrubs. The whitish stain forms obvious rosettes, on closer inspection you can see the faint blackish apothecia. Too bad it takes the patience of a saint to find any spores, without which it’s hopeless…

Intense :)
By: nastassja (Nastassja Noell)
2012-08-07 20:38:11 UTC (+0000)

I would have never guessed that it was lichenized… good eye!

Created: 2012-08-02 00:53:04 UTC (+0000)
Last modified: 2012-08-19 06:55:28 UTC (+0000)
Viewed: 27 times, last viewed: 2017-06-13 15:08:29 UTC (+0000)
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