fnord wrote:

Notice how many of these toxins are common garden plants.  There are many others that weren’t named.  Very tiny amounts of some plant poisons can be administered several times, resulting in an earlier death than would be expected because of cumulative damage to the person being poisoned and giving the appearance of a natural death.

Good to know.

Also note, re the above species of fungi:

Death caps have been reported to taste pleasant. This, coupled with the delay in the appearance of symptoms—during which time internal organs are being severely, sometimes irreparably, damaged—makes it particularly dangerous. Initially, symptoms are gastrointestinal in nature and include colicky abdominal pain, with watery diarrhea and vomiting which may lead to dehydration, and, in severe cases, hypotension, tachycardia, hypoglycemia, and acid-base disturbances.

These first symptoms resolve two to three days after the ingestion. A more serious deterioration signifying liver involvement may then occur—jaundice, diarrhea, delirium, seizures, and coma due to fulminant hepatic failure and attendant hepatic encephalopathy caused by the accumulation of normally liver-removed substance in the blood. Renal failure (either secondary to severe hepatitis or caused by direct toxic renal damage) and coagulopathy may appear during this stage. Life-threatening complications include increased intracranial pressure, intracranial hemorrhage, pancreatitis, acute renal failure, and cardiac arrest

Death generally occurs six to sixteen days after the poisoning.

For some particularly irritating individuals, only a nice, lingering death will really do.  Don't you agree?