Pluteus concentricus
This Pluteus species is quite large, this specimen being 10cm in diam. It had conspicuous concentric 'wrinkles' on its cap.
The gills have a conspicuous brown edge. This is caused by the large cells along the gill edge having brown pigment in them.
These large brown cells along the gill edge are known as cheilocystidia.

They are filled with a brown pigment.

These thickwalled cells are found along the side of the gill and are known as pleurocystidia.

Note the 'hooks' that are on the the ends of the pleurocystidia.

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