Observation 70676: Physcia clementei (Sm.) Lynge
When: 2011-06-25
Who: zaca
No herbarium specimen

Notes: I was not able to find a description or photos of a Physcia species with the following features, present in this specimen:
- No cilia; Coarsely sorediate, at least at the center of thallus; With plenty of brown-black apothecia.

Dimensions of the spores:
(16.1) 16.9 – 20.3 (22.6) x (7.3) 8.2 – 9.7 (10) µm
Q = (1.8) 1.9 – 2.4 (2.6) ; N = 36
Me = 18.6 × 8.8 µm ; Qe = 2.1.

Images

155149
155150
155151
155152
apothecia – magnification: ~30×.
155153
Chemical reactions.
155154
Apothecial sections, Asci and spores.

Proposed Names

29% (1)
Based on microscopic features
Based on chemical features
58% (1)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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I think you are right.
By: zaca
2011-07-06 13:28:27 PDT (-0700)

Even the spores are very similar to those of the other observation.
Thanks, Jason.

Maybe, but it could just be normal variation, too
By: Jason Hollinger (jason)
2011-07-06 08:25:41 PDT (-0700)

If it just rained really hard, it could wash some pruina off causing the apothecia to be darker. The change in color could just be the difference between taking photos on a clear day and an overcast day.

Probably right,
By: zaca
2011-07-04 11:34:50 PDT (-0700)

but seemed to be different from the one in observation MO70329, especially more bluish and darker apothecia.

Looks like Physcia clementei to me
By: Jason Hollinger (jason)
2011-07-01 17:53:25 PDT (-0700)

The pustulate soralia are very distinctive, and the spores agree with the description in CNALH. The medulla should be K+y? (And as we know from your excellent posts, it is a common species there! :)

Created: 2011-07-01 11:12:03 PDT (-0700)
Last modified: 2011-07-06 13:29:02 PDT (-0700)
Viewed: 69 times, last viewed: 2016-10-21 09:43:45 PDT (-0700)
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