Stropharia caerula

Blue Rounded



Meaning belted.





Means sky blue.


When seen fresh it is a striking species, but ideal specimens can be harder to find than slightly 'worn' ones. Fresh it has a wonderful blue-green colouring on the cap which should have small white woolly scales around the edge. The stem appears pale, almost white when it emerges too. Even within a few hours these fade, the scales can disappear from the cap, the stem shows more of the flesh colour and even the cap begins to fade to a yellow-green colour, in some instances with no blue-green colour on the cap at all - although the stem retains some. Often confused with the Verdegris Agaric (Stropharia aeruginosa).


Not distinctive.



Habitat & Distribution

Woodland edges, grassland and frequently on mulched flower beds and gardens. It is common across the UK, and probably often mis-reported as the Verdegris Agaric (Stropharia aeruginosa).


Poisonous. It is also known to contain psilocybin properties which are hallucinogenic, it was also cause gaustric upset.  

Confusion Species


7-9 x 4-5µ, smooth, ellipsoid.

Spore Print Colour


There are two species this could be confused with. The first is the Verdegris Agaric (Stropharia aeruginosa), the main feature to look for is a white edge to gills, which the Verdegris Agaric has, the Blue Roundhead does not. 

The Peppery Roundhead (Stropharia pseudocyanea) is very similar occuring in grassland, but has a distinctive peppery smell, which the Blue Roundhead does not. 

Tel. 07533 132 129 


Manchester, Cheshire, Deeside & North Wales

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