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Cornell University Poisonous Plants
Searchable database includes plant images, pictures of affected animals and presentations concerning the botany, chemistry, toxicology, diagnosis and prevention of poisoning of animals by plants and other natural flora.
www.ansci.cornell.edu/

Guide to Poisonous Plants
Includes a search mechanism and links.
www.vth.colostate.edu/

List of Plants Poisonous to Dogs and Ccats
List compiled by the ASPCA Animal Poison Control Center.
www.aspca.org/

Plants Causing Sudden Death
Article by A. P. Knight and R. G. Walter on plants that can cause sudden death in animals.
www.ivis.org/

Poisonous Plants for Small Animals
Plants that are poisonous and possible deadly to your dog, cat, or pocket pet.
www.peteducation.com/

Plants Dangerous to Your Reptile or Amphibian
Plants that are poisonous and possible deadly to your reptile or amphibian.
www.peteducation.com/

Plants Which Are Potentially Poisonous
Common plants, their fruits, and seeds that can be poisonous to cats.
www.peteducation.com/

Poisonous Plants for Birds
A listing of plants which are poisonous for birds, and a listing of those that are safe.
www.peteducation.com/

Poisonous Plants in Indiana
Purdue University list of plants poisonous to animals, clinical signs, and species affected.
vet.purdue.edu/

Plants Poisonous to Livestock in Minnesota
This bulletin describes their appearance, where they grow, the parts of the plant that are poisonous, when they are most poisonous, poisoning symptoms, and names of the toxic compounds present in the plant. For livestock owners.
www.extension.umn.edu/