water hemlock


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Related to water hemlock: water parsnip

water hemlock:

see poison hemlockpoison hemlock,
lethally poisonous herbaceous plant (Conium maculatum) of the family Umbelliferae (parsley family). It has rank, finely divided foliage, flat-topped clusters of small white flowers, and a hollow, purple-mottled stem.
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Water Hemlock

 

(Cicuta), a genus of plants of the family Umbelliferae. Perennial water or marsh grasses with double or quadruple pinnate leaves. Small white blossoms, gathered into compound umbels. Fruit mostly rounded with mericarps slightly compressed on the sides. About ten (by other data, up to 20) species, mainly in North America.

In the USSR, the Eurasian species, C. virosa, is widespread: stalk hollow, height 50-150 cm; leaves double or triple pinnate; vertical rhizome divided into chambers by septa. The plant grows in marshes, on wet meadows, in alder thickets, and along swamped banks of rivers, lakes, and ditches. This is one of the most poisonous plants of the flora of the USSR. Especially dangerous are the rhizome and roots, which contain the poisonous substance cicutoxin. Domestic animals (chiefly cattle and sheep) are poisoned most frequently in autumn or spring. In intoxication, there is salivation, restlessness, distention of the rumen, frequent discharge of feces and urine, and convulsive contraction of the jaws. Characteristic are repeated tonic spasms (with prolonged contraction of muscles) and collapse of the animal, rapid pulse, and slow respiration. Death results from suffocation. Treatment consists of the immediate use of tannin, carbon, and laxative and cardiac (caffein) drugs; in the event of convulsions, chloral hydrate is used.

REFERENCE

Atlas lekarstvennykh rastenii SSSR. Moscow, 1962.
References in periodicals archive ?
As a preventative, pull water hemlock plants from the soil during the summer when they can readily be found and destroy them.
Aconite, Allspice, Black Snakeroot, Bloodroot, Blue Cohosh, Boxwood, Celandine, Common Poppy, Crotalaria, Crow Poison, Death Camas, Dicentra, False Hellebore, False Jessamine, Fume wort, Hellebore, Hemp, Horse Nettle, Indian Hemp, Indian poke, Jimson weed, Larkspur, Lobelia, Lupines, Marijuana, Monkshood, Moonseed, Night shade, Pink Death, Camas Poison, Darnel, Poison Hemlock, Poison rye grass, Rattleweed, Rock Poppy, Spider Lily, Spotted cowbane, Spotted Water Hemlock, Stagger grass, Staggerweed, Sweet Shrub, Thorn Apple, Varebells, Wild Parsnip, Wolfs-bane, Yellow Jessamine.