According to literature, the manganese content of most basidiomycetes
fluctuates between 10 and 60 mg/kg, whereas the iron levels range from
100-500 mg/kg (both expressed on dry weight). The present authors rep
ort that bioconcentration of manganese is a distinguishing feature of
the Panaeoloideae, as demonstrated by the analysis of 44 collections r
epresenting 15 taxons. Carpophores generally contain between 250 and 2
500 mg/kg on dry weight, and, with the notable exception of Panaeolus
semiovatus, P. antillarum and P. phalaenarum, their iron content is 2
to 3 times lower. This phenomenon was not observed in members of relat
ed genera such as Psathyrella and Coprinus.