FOUND IT!
N.B. I want to reassure you, that I, Bouncing Bertie Boffin, Scientific Advisor to Blogville etc. etc., have identified the specimen of fungus in the photo above as a 'fly agaric', more formally Amanita muscaria, of the phylum Basidiomycota. This type of toadstool is known to contain psychoactive substances, which may explain (scientifically of course) its cultural association with fairies and such like!
