Water Hemlock (Cicuta maculata L.)
The clinical signs of water hemlock poisoning often follow a rather definite sequence. Frothing at the mouth may occur first, but this is quickly followed by uneasiness, frenzied movements, and other evidence of intense abdominal pain. Jerking of the muscles, twisting backward of the head and neck (opisthotonus), together with stiffening of the limbs, dilated pupils, and rolling eyeballs are followed by spasms of the diaphragm (in some species this may be associated with vomiting), convulsions, and death. The poison acts so quickly that the affected animal may die 15 minutes after the first abnormalities are noticed.
| Description & image | Distribution | Conditions of poisoning | Control | Toxic principle |
| Plant Lists: Scientific or Common | Veterinary Medicine Library | UIUC Library |