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| | Poison Ivy |
 | | It was he who coined the name "Poison Ivy." Ever since then, there has been confusion regarding this plant and its cousins. |
 | | Woodlands with poison ivy present in the understory include Bur Oak (Quercus macrocarpa), Green Ash (Fraxinus pennsylvanica), Green Ash/American Elm (Ulmus americana), Bur Oak/Green Ash, and Quaking Aspen (Populus tremuloides). |
 | | Over two hundred years ago, plant taxonomists, starting with Linnaeus himself, lumped the poisonous ivies, oaks, and sumac in with the other less-poisonous varieties of the Rhus genus. |
| www.rook.org /earl/bwca/nature/shrubs/toxicodendron.html (701 words) |
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