If you haven't already checked out this out I would highly recommend it. Pet Poison Helpline now offers a handy iPhone application that contains an extensive database of foods, drugs, chemicals and plants commonly found in the home and yard that are poisonous to pets.
The iPhone application’s comprehensive database includes more than 250 toxins, each with a description, list of symptoms and a full color photo, which is very helpful for identifying poisonous plants and flowers. The photos can be expanded to full screen size for easy identification with just the tap of a button. Each toxin entry has a bright yellow banner across the top that indicates the potential severity of the toxin, from “mild to moderate,” to “moderate to severe.” When in the midst of a potential emergency, users can dial Pet Poison Helpline directly from the application on their phone.
I spent the $0.99 for the app and I feel better prepared. Search "Pet Poison Help" in the app store on iTunes to find it.