Notes: Growing on siliceous rock together with Rhizocarpon spp. and Miriquidica deusta (I believe).
The spores of this Rinodina are clearly of Physcia-type (see observation 204088, where some spore-types of Rinodina are illustrated). According to the Bristish Flora in the British islands (and by extension, I suppose that the same happens here) only three species have this feature:
R. confragosa, R. mniaraea and R. parasitica;
The last one can be eliminated, since it lives parasitic on Aspicilia; R. mniaraea is a rare species with orangish medulla due a K+ purple pigment and warted thallus. Therefore, only R. confragosa seems plausible. Looking to the description it fits very well on this species. For the spores I got the following dimensions:
(20.8) 23.1 – 27.3 (31.5) x (8.3) 8.9 – 11.3 (12.3) µm
Q = 2.2 – 3 (3.1) ; N = 25; Me = 25.1 × 10 µm ; Qe = 2.5 .
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Created: 2015-09-20 18:34:37 CDT (-0400)
Last modified: 2015-09-20 18:36:46 CDT (-0400)
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