Observation 197607: Cyphelium tigillare (Ach.) Ach.

When: 2015-01-31

Collection location: Atascadero, California, USA [Click for map]

35.4514° -120.6437° 280m

Who: J-Dar

No specimen available

On old wood ranch fence board in rural Atascadero, valley oak (Quercus lobata) savannah and pastureland.

Mazaedium black. Thallus light yellow green under microscope, comes across as distinctly light green with the naked eye.
Apothecia sessile? Immersed? Exciple thin or thickened at base? This is my first attempt to key this group and my first thought was sessile apothecia and exciple thickened at base which took me to C. pinicola and C. lucidum; the former is somewhat out of documented range and habitat, the latter just doesn’t look right in photos. C. tigillare fits the range and looks right in photos, and reconsideration of the exciple being thin throughout might be correct, although I don’t think I understand “immersed” apothecia…I’m probably not the only one!


Copyright © 2015 40x in microscope with Amscope DSLR adapter
Copyright © 2015
Copyright © 2015 80x in microscope with Amscope DSLR adapter
Copyright © 2015
Copyright © 2015
Copyright © 2015

Proposed Names

76% (2)
Eye3 Eyes3
Used references: Nash Volume 2 and Consortium of NA Lichen Herbaria

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I’m uploading two observations of C. pinicola for comparison
By: Jason Hollinger (jason)
2015-01-31 17:42:44 MST (-0700)

I’m a bit behind on uploads…

observation 197610
observation 197611

Still confused…
By: J-Dar
2015-01-31 17:22:42 MST (-0700)

Thanks for the info Jason, maybe after a few more years and a few more specimens I’ll get it!

Example of immersed apothecium
By: Jason Hollinger (jason)
2015-01-31 17:13:50 MST (-0700)

Look at the small apothecium in the bottom-middle of the third photo, I think that’s the clearest. I think an oblique shot may show the character off better, though.

I think you got it first try
By: Jason Hollinger (jason)
2015-01-31 17:09:46 MST (-0700)

I was equally (more?) confused about what they really meant by “sessile” and “immersed” in this context. But finally after several years, after seeing a couple specimens of each plus many photos, I believe the key is whether the apothecia are ever immersed. The thallus can erode in age, and the mazaedium itself will extrude upward and make it look for all the world like it’s superficial. Ignore all that! Look for the young apothecia. And I see one which is clearly immersed, the proverbial smoking gun.

Created: 2015-01-31 16:30:53 MST (-0700)
Last modified: 2015-01-31 17:04:39 MST (-0700)
Viewed: 63 times, last viewed: 2017-06-19 17:46:45 MST (-0700)
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