"Amatoxin poisoning from Lepiota Castanea shows a biphasic clinical pattern. An initial (12–24 hours) period of acute symptoms is followed by a period of relative wellness that lasts for 12–24 hours. After this period, hepatic and renal failure supervene with death typically occurring from day 2 onwards.

The estimated minimum lethal dose is 0.1 mg/kg or 7 mg of toxin in adults. Their swift intestinal absorption coupled with their thermostability leads to rapid development of toxic effects in a relatively short period of time. The most severe effects are toxic hepatitis with centrolobular necrosis and hepatic steatosis, as well as acute tubulointerstitial nephropathy, which altogether induce a severe hepatorenal syndrome."

I have had these in my yard. No more