Plants

The Columbia Encyclopedia, 6th ed. A Dictionary of Nursing Further reading

hemlock

The Columbia Encyclopedia, 6th ed. | 2008 | Copyright

hemlock any tree of the genus Tsuga, coniferous evergreens of the family Pinaceae ( pine family) native to North America and Asia. The common hemlock of E North America is T. canadensis, an ornamental tree (sometimes cultivated as a hedge) with small cones and short, dark green leaves so arranged as to give the branchlets a flattened appearance. The tree has been highly valued as a source of tanbark but is now seriously reduced in number. Its wood is soft and light. One of the two Western hemlocks ( T. heterophylla, the tallest tree of the genus) has more valuable wood, which is used in construction work. The ground hemlock is a species of yew . The poison hemlock and water hemlock are herbs of the family Umbelliferae ( carrot family) of the division Magnoliophyta . True hemlock is classified in the division Pinophyta , class Pinopsida, order Coniferales, family Pinaceae.

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hemlock

A Dictionary of Nursing | 2008 | Copyright

hemlock (hem-lok) n. the plant Conium maculatum, found in Britain and central Europe. It is a source of the poisonous alkaloid coniine.

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"hemlock." A Dictionary of Nursing. 2008. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>.

"hemlock." A Dictionary of Nursing. 2008. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O62-hemlock.html

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Free newspaper and magazine articles

	Hemlock: the graceful conifer of the West. (tree) (Wood of the Month) Magazine article from: Wood & Wood Products; 3/1/1995
	Hemlock Semiconductor Joint Ventures to Invest up to $3.0 Billion to Expand... PR Newswire; 12/15/2008
	DYING HEMLOCKS CHANGE MOUNTAIN'S CHARACTER.(DAILY BREAK) Newspaper article from: The Virginian-Pilot (Norfolk, VA); 7/25/2002