Melanthium laetum

About

Amianthium is a genus of perennial monocot plants found in eastern North America. The genus contains only one species, known as Amianthium muscitoxicum. Its common names include "fly poison" and "stagger grass". The species name muscitoxicum comes from a direct Latin translation of "fly poison": muscae = flies, toxicum = poison. The entire plant is poisonous to an array of species, including humans, and the bulb is particularly toxic. A. muscitoxicum was first recorded by Thomas Walter in his work Flora Caroliniana in 1788.

Summary from Wikipedia