
North America (Pacific Northwest, California), Europe, and other temperate regions. Same distribution as G. marginata since they are now considered conspecific.
Saprotrophic on decaying hardwood and conifer logs, stumps, and woody debris. Grows in clusters on rotting wood in forests.
Autumn (as the name suggests), though can fruit from late summer through early winter.
Amatoxins
Overview: Identical to Galerina marginata amatoxin poisoning. Phase 1 Gastrointestinal: 6-24 hours post-ingestion: severe abdominal pain, vomiting, diarrhea. Mechanism: RNA polymerase II inhibition by amatoxins.