There are many common houseplants that are poisonous to our pets. Because pets are curious creatures they will tend to get into everything and then proceed to put it in their mouths. If they smell a sweet scent or distinct taste they may ingest it and it could become fatal. It is important to identify the ingested plant and get emergency help immediately. The ASPCA animal poison control will give you more specific information than your local poison control as they specialize with animal poisons however they do have a minimal charge.