When: 2016-06-04

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

Who: zaca

No specimen available

Notes:
See the notes of observation 241353.
As already mentioned at a former observation previously this species was considered as a variety of R. aspersa, sharing with it many features including the chemistry. However, the C+ red reaction that is usually clear in R. aspersa sometimes is dubious in R. atrocinerea leading to a possible confusion with R. beccariana , which reacts C- and as similar spores of the so-called Pachysporaria-type.
In the case of this observation the C+ red reaction was well visible.

Images

Close uo of the center of thallus;
The specimen and its c+ red reaction.
Microscopy: Asci and spores.

Proposed Names

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Comments

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Microscopy added: Rinodina atrocinerea confirmed.
By: zaca
2016-06-20 19:38:19 BST (+0100)

Dimensions of the spores:
(15.9) 16.9 – 20.6 (23.2) × (8.3) 10 – 13.6 (14.9) µm
Q = (1.4) 1.5 – 1.7 (2) ; N = 27
Me = 19 × 11.9 µm ; Qe = 1.6 .