Observation 216831: Rhizocarpon badioatrum (Flörke ex Sprengel) Th. Fr.

When: 2015-05-02

Collection location: Serra de São Mamede, Portugal [Click for map]

Who: zaca

No specimen available

Growing on siliceous rock.
This observation refers to the lichen (Rhizocarpon) at the bottom part of the 1st photo. At the center we have a small yellow Rhizocarpon and at the upper part one can see (an infertile) Miriquidica deusta.
This specimen is very similar to those in observation 202029 and observation 216829, so I refer to these observations for most of the details and references.
Concerning the chemistry the main feature of this specimen is the generalized purple-red reaction of the epihymenium and of the exciple (and in less extent also to the hypothecium) under the addition of KOH. Using the discussion in the above mentioned observations and taking into account the spores dimensions:
(23.7) 27.2 – 32.9 (37) x (12.1) 13.6 – 17.5 (18.9) µm
Q = (1.6) 1.7 – 2.2 (2.3) ; N = 27
Me = 30 × 15.4 µm ; Qe = 2 ,
I think that most probably this is Rhizocarpon badioatrum.

Proposed Names

58% (1)
Eye3 Eyes3
Based on microscopic features
Based on chemical features

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
No one has commented yet.

Created: 2015-09-23 17:15:36 CDT (-0400)
Last modified: 2015-09-23 17:15:44 CDT (-0400)
Viewed: 26 times, last viewed: 2017-11-27 06:13:53 CST (-0500)
Show Log