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