viride is also know as Corn Lily, American White Hellebore,
Indian Poke, and Itch-weed. Wikipedia
tells us the plant is highly toxic, causing nausea and vomiting.
If the poison is not evacuated, cold sweat and vertigo appears,
respiration slows, cardiac rhythm and blood pressure falls, eventually
leading to death. It is used by several native American nations
for external treatment. Although it is rarely ever used in modern
herbary due to its concentration of various alkaloids, it has
been used in the past against high blood pressure and rapid heartbeat.
The root contains even higher concentrations than the aerial parts.
to "A Campsite Lost and Found"