Another species that is variable in colour, making it difficult to separate it from the other similar looking species, namely G. lilacinoides, G. versicolor and G. ostrinus. Fortunately, it's the only species in this group that has cheilocystidia. The cheilocystidia can be seen as a glossy edge on the gills. A hand lens can be useful here (see the image to the right).
It's interesting, when looking at my photos, I see this species falls into two quite distinct colour ranges. I am left to wonder if we have two species hiding under the same name.