Common Plants or Flowers that are Toxic

Cats and dogs seem to always be finding strange things inside and outside to eat. Chocolate is a known toxin but the plants in your garden or flowers on your table could also be harmful to your pet. Just because the plant is no longer growing in the ground does not mean it has lost it toxicity.

Aloe Vera: Symptoms your pet has eaten this are vomiting, diarrhea, and change in urine color. Consumption could lead to depression, anorexia and tremors.
Azalea: It only takes a few leaves to cause serious problems. Illness may pass after two or more days but if no improvement is seen, your pet may become comatose and die. Symptoms include: excessive drooling, loss of appetite, loss of coordination, weak heart rate, diarrhea, depression, leg paralysis.
Carnations: Although not the most poisonous this is still a quite common flower. Symptoms: Mild gastrointestinal signs and mild dermatitis.
Daffodil: Grown in late winter and early spring. The bulb is the most poisonous part of the plant. The bulb is what the flower grows from and is in the ground. If you see your pet digging around these flowers make sure you stop them immediately. Symptoms: vomiting, excessive salivation, diarrhea; when consumed in large quantities they can cause convulsions, low blood pressure, tremors and cardiac arrhythmias.
Lilies: This beautiful plant is a giant no for cats! They are very poisonous to cats even in small quantities and every cat owner knows how much cats love to munch on plants. Causing kidney failure in cats.
Morning Glory: While cats on catnip are funny the hallucinogens caused by morning glory are not. Cats and dogs experience a rubber realty. Symptoms: agitation, tremors, disorientation, anorexia, hallucinations.
Poinsettia: If you enjoy putting these festive holiday flowers out it’d be best to get fake ones. While it is a myth that it will kill your cat that doesn’t mean it won’t make it sick. Symptoms: Irritating to the mouth and stomach, sometimes causes vomiting.
Tomato Plant: Who doesn’t enjoy juicy home grown tomatoes in the summer? Your pet. If your pet finds their way into your tomatoes it will not prove lethal but will cause a nasty stomach ache and behavioral change. Symptoms: severe gastrointestinal distress, diarrhea, drowsiness, depression, confusion, behavioral change, weakness, dilated pupils, slow heart rate.
Oleander: This pretty flower is pretty poisonous. Ingesting any part of the flower affects cats, dogs, and even horses. Symptoms: Diarrhea, sweating, incoordination, difficult breathing, muscle tremors, recumbency, and possibly death from cardiac failure.
Yew: Digestion of any part of the tree, except the berries, can be very poisonous to animals. Horses especially have a very low tolerance for it. Symptoms: Central nervous system effects such as trembling, incoordination, and difficulty breathing.

http://www.vetmed.ucdavis.edu/ccah/health_information/plants_pets.cfm