Observation 96210: Umbilicaria

When: 2012-06-03

Collection location: Turnbull National Wildlife Refuge, Spokane Co., Washington, USA [Click for map]

47.0° 117.0° 707m

Who: nastassja (Nastassja Noell)

Specimen available

Substrate: basalt rock.

Habitat: Ponderosa pine meadow, wetland, aspen community ecotone.

Notes: NE side of rock face, 7 inches above soil line, exposed.

This was amongst a collection of Umbilicaria hyperborea observation 96209 and looks very similar (postulate ridged surface, similar pruinose tan underside, but lacks the fissured apothecia of U. hyperborea); assuming it is U. hyperborea except the apothecia-like buttons on the upper cortex are odd — when wet they look gummy and orange-reddiish, <1mm; cross section does not look like ascomata structure, can’t seem to find any asci formation, or any coherent structure (not to say that there isn’t one, maybe section too thick or I’m just not seeing it) except that the hyphae in that section is much more dense than the medulary hyphae, and there is an outer cortex across the top, no ostioles seen. No photobiont cells found on the interior of those structures. Not sure what these structures are. When dry these structures look black. There are no fissured apothecia characteristic of U. hyperborea on this specimen.


mythelene blue dye
the intiorior of one of the structure,.

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Add Comment
I never use stains personally
By: Jason Hollinger (jason)
2012-06-03 20:27:44 AEST (+1000)

I just lower the intensity of the illuminator to improve contrast. You should be able to see spores and asci clearly even at 400×.

Check out new photos
By: nastassja (Nastassja Noell)
2012-06-03 19:30:46 AEST (+1000)

went from 100x-1000x on one section.

Is there a stain you would use?

Do you think they’re apothecial initials instead?
By: Jason Hollinger (jason)
2012-06-03 19:08:00 AEST (+1000)

Oh, or maybe a parasite? They just seem to regular to be something accidental…

I’ve never seen anything like it.

By: nastassja (Nastassja Noell)
2012-06-03 19:04:14 AEST (+1000)

sure don’t look like pycnidia or perithecia… no ostiole from what I can see, and the structures on the inside look all haphazard, not orderly, I’ll take a thinner slice, maybe that’ll help. Thanks Jason :)

Consider Dermatocarpon, too
By: Jason Hollinger (jason)
2012-06-03 18:58:10 AEST (+1000)

These structures are either pycnidia (Umbilicaria) or perithecia (Dermatocarpon). If it is C+ pink/red it is Umbilicaria for sure. C- might be either… are there any C- Umbilicaria?

Created: 2012-06-03 18:48:19 AEST (+1000)
Last modified: 2012-06-03 19:01:05 AEST (+1000)
Viewed: 54 times, last viewed: 2017-06-13 16:49:02 AEST (+1000)
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