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From: Aguanga, CA
Region: California
Topic: Poisonous Plants
Title: Native plants and possible poisonous plants in Aguanga, California
Answered by: Nan Hampton
Now for the poisonous native plants in southern California I actually found a couple of lists. One list by Owen E. Dell, The Big Ten: Southern California Plants Seriously Poisonous to Humans, as its name suggests lists ten highly toxic plants. Only one of these, however, Toxicodendron diversilobum (Pacific poison oak), is native to southern California and North America. You certainly would want to recognize those nine other toxic plants so I suggest that you do an internet search on each of them using their scientific name to see photos and read more about them. Another list (also by Owen E. Dell), Poisonous Plants Commonly Occurring in Southern California, is a more extensive list that includes plants with various degrees of toxicity—some mild and some severe. This list does contain many plants native to southern California that you can find by searching in our Native Plant Database. There is also a small book, Poisonous plants of southern California, published in 1998 by the Los Angeles County Department of Parks and Recreation that should be available in a nearby library or is possibly still in print.
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