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...at Lakes]] region and was first spotted in 1843<ref>{{cite web |title=List of invasive species in the Great Lakes Great Lakes United / Union Saint-Lauren ...shaped, and often lobed at the base. The [[flower]]s are in loose clusters of 3–20, (1–1.5&nbsp;cm) across, star-shaped, with five purple petals and

...] and southwest [[Asia]].<ref name=rushforth>Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.</ref> It is the tree orig ...th the leaf bases twisted to align the leaves in two flat rows either side of the stem, except on erect leading shoots where the spiral arrangement is mo

...ermplasm Resources Information Network |publisher=United States Department of Agriculture |date=1998-03-09 |accessdate=2010-06-26}}</ref> ...m the old Latin name for the flower. Oleander is one of the most poisonous of commonly grown garden plants, and can be very toxic if ingested in sufficie

.... ''Manual of cultivated trees and shrubs hardy in North America exclusive of the subtropical and warmer temperate regions''. Macmillan publishing Co., I ...ria]] east through [[Turkey]] to the [[Caucasus Mountains]] and northern [[Iran]].<ref>Euro+Med Plantbase Project: [http://ww2.bgbm.org/_EuroPlusMed/PTaxon

...Genome Sciences |publisher=[[University of Maryland, Baltimore|University of Maryland Medical School]] |accessdate=2009-03-09}}</ref> Castor seed is the source of [[castor oil]], which has a wide variety of uses. The seeds contain between 40% and 60% oil that is rich in [[triglycer

..., northern [[Africa]], and [[North America]], and is the best-known member of the [[nettle]] genus ''[[Urtica]]''. ...e]], [[5-HT]] or [[serotonin]], and possibly [[formic acid]]. This mixture of chemical compounds cause a painful sting or [[paresthesia]] from which the