Livestock and Range
Livestock and Range
Livestock and Range
University of California
Livestock and Range

Poisonous Plants


UCCE Advisors and Specialists write many papers summarizing research projects, monitoring procedures, and general management practices.  All papers are peer-reviewed, meaning before they can be published, another set of people within the University review to ensure the papers are scientifically valid and not someone’s opinion.  Here you will find free publications (available as a PDF) from the University of California, as well as links to larger publications you may purchase, each with a summary.  In addition, each of the publications are available at your local UC Cooperative Extension office for your convenience. 


Poisonous Plants

Many hundreds of species of poisonous plants grow in the United States. Some of the most beautiful trees, shrubs, vegetables, and vines are poisonous under certain conditions. They provide shade, colorful flowers, or food, but parts of the plant (sap, leaves, seed, flowers, stems) may also contain toxic compounds. Using this publication, you will learn how to identify plants associated with poisonings and other health problems. Included is a table of poisonous plants commonly found around the home and garden and instructions on making a plant identification file. 8560 Poisonous Plants">Click here for full text.

Livestock-Poisoning Plants of California

Horses, goats, sheep, and cattle can sicken or die if they eat from a poisonous plant. The best strategy is just to keep these plants out of reach. Here are photos, ID info, and poisoning symptoms for more than 30 hazardous ornamental and range plants. Click here for full text.

Common Groundsel: Pest Notes for Home and Landscape

Common groundsel or old-man-of-the-spring is found throughout California. It can cause chronic liver poisoning to horses, cattle, and swine, even if only a small amount is eaten over a few weeks. Click here for full text.

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