If you have the great opportunity of walking in the woods today, look closely. I'll bet you can find some blood root. Look for stark white petals poking up through brown leaves.
Bloodroot contains alkaloids similar to those of the opium poppy, including sanguinarine, which can depress the central nervous system. Overdoses cause vomiting, irritation of mucous membranes, diarrhea, fainting, shock, and coma. Most poisonings reported were from medicinal preparations.
~Steven Green and Roger Caras, Venomous Animals & Poisonous Plants