Cicuta may be confused with a number of other edible and poisonous plants. The common name hemlock may also be confused with poison hemlock ("Conium maculatum"), or with the Hemlock tree. Water hemlock is considered one of North America's most toxic plants, being highly poisonous to humans. Three members of the genus contain a toxin named cicutoxin which causes central nervous system stimulatory effects including seizures following ingestion. Medical treatment of poisoning may include the use of activated charcoal to decrease gastrointestinal absorption of the toxic principle along with supportive care including anticonvulsant drugs such as a benzodiazepine. High doses of
Cooperia (plant) Cooperia (plant) Cooperia was a genus of tender herbaceous perennials native to South America and the southern reaches of North America. They were closely related to "Zephyranthes" and "Habranthus", all of which are members of the amaryllis family, Amaryllidaceae. All three genera were commonly known as rain lilies because of their propensity for blooming after rains. "Cooperia" blooms in summer and fall. Although "Cooperia" was considered distinguishable from the better known rain lily genus, "Zephyranthes", by its fragrance similar to primroses, its white or yellow pollen, its tolerance for drout and desert conditions (Howard 2001:54) and tendency to be night-blooming