Here are a couple of links that you will find helpful. One is a link to a site that has a comprehensive list of plants that are poisonous to dogs. It also has a link to another site where you can view pictures of the plants to help identify them if you don't know the kinds of plants you have.
The other link is the ASPCA's National Animal Poison Control Center site, where you can also list of common substances and plants poisonous to dogs.
Remember if your pup does ingest any poison, always call the national animal poison control hotline at +(888) 426-4435 right away.
This site lists all the different possible poisonous plant for dogs and the signs of being poisoned. At the bottom of the page you will find a link for the national animal poison control center. Check it out. Www.cybercanine.com/toxicplants.htm