WATER-HEMLOCK, Common. This plant is very common in England. It is a well known fact in Sweden, that horses will eat it, and that it frequently proves fatal to them by inducing a palsy: this effect, nevertheless, is judged to be owing to an insect which inhabits in great plenty the stalks of this herb, and from this singular effect is called by Linnaeus curculio paraplecticus, when in its perfect state, as the larva only exists in this vegetable. The same caterpillar is found in the water-parsnip also in England.