 Both amanitins were quantified in "G. autumnalis" (1.5 mg/g dry weight) and "G. marginata" (1.1 mg/g dry weight).Later experiments confirmed the occurrence of γ-amanitin and β-amanitin in German specimens of "G. autumnalis" and "G. marginata" and revealed the presence of the three amanitins in the fruit bodies of "G. unicolor".Although some mushroom field guides claim that the species (as "G. autumnalis") also contains phallotoxins (however phallotoxins cannot be absorbed by humans), scientific evidence does not support this contention.