Zigadenus is a genus once considered to belong to Liliaceae and now being proposed for the Melanthiaceae family. Once considered to be a North American genus with about 18 to 20 species, it has been broken apart on molecular grounds (supported by morphology and distribution) and the former species are now found in five different genera. The four additional genera with species once included in this genus are Amianthium, Anticlea, Stenanthium, and Toxicoscordion. Only one species is left in this genus, Zigadenus glaberrimus known as the sandbog death camas. This species grows in pine bogs, savannas and sandy pine lands in the southeastern United States. Growing from thick, twisted rhizomes, it flowers mid summer to early fall and has many white to cream colored flowers in a loose panicle. Distinguishing characteristics from the other genera are the rhizome and two conspicuous glands per tepal.
Zigadenus fremontii (syn. Toxicoscordion fremontii)
Zigadenus muscaetoxicus (syn. Amianthium muscaetoxicum)
Zigadenus venenosus (syn. Toxicoscordion venenosum)