Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!turpin From: turpin@cs.utexas.edu (Russell Turpin) Newsgroups: sci.bio Subject: Re: Ecosystemic Contamination Summary: Johnson grass. Message-ID: <7012@cs.utexas.edu> Date: 10 Oct 89 19:29:48 GMT References: <8909272147.AA01656@aristotle.Jpl.Nasa.Gov> <2035@frog.UUCP> <11681@burdvax.PRC.Unisys.COM> Organization: U. Texas CS Dept., Austin, Texas Lines: 11 In article <11681@burdvax.PRC.Unisys.COM>, overt@antony (Christian Overton) writes: > I'm glad this came up on the net. I was trying to explain to my seven-year old > son about the problems that can arise when plants and animals are introduced to > new environments by man; he got excited by the idea and wanted me to compile a > list of recent invaders mostly to N. America (n.a.). I'm looking for any > interesting additions to my current list... Johnson grass was introduced in the last century. Is this late enough? Russell