There are several plants poisonous to cats and dogs in your garden. Some plants can make animals sick, and some are lethal.

According to Dana Farbman, Senior Manager of Client and Professional Relations within the ASPCA Animal Poison Control Center, the top four plant poisoning calls in 2003 were Cannabis sativa (marijuana), Cycas revoluta (sago palm), Spathiphyllum (peace lily) and Philodendron. "Depending on the plant and exposure situation involved, potential long-term or residual effects from plant poisonings could possibly occur", she says. "For example, in certain situations, ingestion of cycads (such as Sago Palm) could potentially result in liver failure or residual neurological effects." Other plants with potential for sickness and toxicity are:

• Xanthium strumarium (common Cocklebur)
  From the daisy family, this plant has a high toxicity rating for cattle, less so for house pets. Signs include gastrointestinal disorders, cardiac symptoms, behavioral and breathing changes. Care should be taken that the plant isn't in grazing fields or hasn't fallen into feed containers. Buying seed and feed from reputable dealers is a better and safer bet.

• Hydrangea macrophylla (Hydrangea)
  Contains the toxic chemical cyanogenic glycoside. Signs of a poisoning by Hydrangea include loss of weight, high heart rate, fever, vomiting and diarrhea.

• Caladium hortulanum (Elephant Ears)
  Contains calcium oxalate crystals which clinically produces intense oral irritation and burning. Signs will include excessive drooling, vomiting, increased difficulty in swallowing and general mouth and throat problems.

• Euphorbia pulcherrima (Poinsettia)
  Once considered a highly toxic plant, the Christmas favorite still has enough bite to sufficiently ruin your pet's holiday. The sap from the leaves contains an irritant that will make your pet vomit and have head tremors. Take care and leave this one in a safe place in your house.

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