User:Gerald A. Mulligan

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I have been studying the biology of weeds for over half a century, especially the common weeds of the northern United States and Canada, and have accumulated much biological information and many colored photos. I have put some of this on the website http://www.cwss-scm.ca/Weeds/index.html. Included, on this wewbsite, are short descriptions and pertinent information on the economic and other impacts caused by the common weeds of the northern United States and Canada. This includes their life durations, breeding systems, means of seed production and/or vegetative spread, methods of seed dispersal and/or vegetative establishment, growth habits, and any special properties. The account, for each weedy species, is accompanied by one, and sometimes many colored photographs. The many colored photographs showing the morphological variation of poison ivy, western poison-oak, and poison sumac can be accessed directly by going to http://www.cwss-scm.ca/Weeds/cashew.html. Common plants of the northern United States and Canada reported to have caused poisonings, a dermatitis, or hay fever in humans is at http://www.cwss-scm.ca/Weeds/poisonous_weeds.htm, Plants of Canada and the northern United States that are poisonous to livestock, or that have tainted animal products is at http://www.cwss-scm.ca/Weeds/plants_poisonous_animals.htm, and Weedy mustards, Brassicaceae (Cruciferae) of Canada is at http://www.cwss-scm.ca/Weeds_mustards.htm.