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Water hemlock is the most violently toxic plant that grows in North America. Only a small amount of the toxic substance in the plant is needed to produce poisoning in livestock or in humans. The toxin cicutoxin, acting directly on the central nervous system, is a violent convulsant.
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water hemlock, (genus Cicuta), genus of four species of poisonous plants in the parsley family , common throughout the north temperate zone. Water hemlocks typically grow in wet, marshy places and are often confused with nonpoisonous members of the family, such as wild carrots or parsnips.
Cicuta, commonly known as water hemlock, is a genus of four species of highly poisonous plants in the family Apiaceae. They are perennial herbaceous plants which grow up to 2.5 meters (8 ft) tall, having distinctive small green or white flowers arranged in an umbrella shape (umbel).
All parts of water hemlock are toxic, but the poison is especially virulent from the roots. The lower stem and upper roots of Cicuta contain numerous internal partitions or air spaces that can be revealed if sliced lengthwise.
The leaves of Cicuta douglasii (left), along with those of Conium maculatum (poison hemlock); both species are extremely poisonous. The plant's roots are thick and tuberous, with many smaller tubers on the main one, [2] allowing survival in wet conditions.
The ingestion of water hemlock can lead to serious complications that may be fatal. Prognosis is good, however, if prompt supportive care is provided.
25 cze 2017 · The active toxic compound in water hemlock is cicutoxin. The hemlock water dropwort (Oenanthe crocata) belongs to the family Apiaceae (Umbelliferae), genus Oenanthe. It is native to Europe but has been introduced to some parts of the United States.
