The toxicity of certain "Galerina" species has been known for a century. In 1912, Charles Horton Peck reported a human poisoning case due to "G. autumnalis". In 1954, a poisoning was caused by "G. venenata". Between 1978 and 1995, ten cases caused by amatoxin-containing Galerinas were reported in the literature. Three European cases, two from Finland and one from France were attributed to "G. marginata" and "G. unicolor", respectively. Seven North American exposures included two fatalities from Washington due to "G. venenata", with five cases reacting positively to treatment; four poisonings were caused by "G. autumnalis" from Michigan and Kansas, in addition to poisoning caused by an unidentified "Galerina" species from Ohio. Several poisonings have been attributed to collectors consuming the mushrooms after mistaking them for the hallucinogenic "Psilocybe stuntzii".