[A S. hemleac.] A plant of the genus Coniutm, whose leaves and root are poisonous. The common or spotted hemlock is from 2 to 7 feet in height, and grows by waysides and on heaps of rubbish. It is common in Europe and in some parts of Asia, and is now also a naturalized plant in North America and Chili. A valuable medicine is obtained from the leaves and fruit. Water hemlock grows in ditches, on the margins of ponds and on wet grounds in Europe and the north of Asia. It is a very poisonous plant, and is the cause of many deaths. Hemlock spruce is an evergreen cone bearing tree, common in North America. It is a beautiful tree, often growing to the height of 100 feet. The bark is largely used in tanning leather.