I bought a book on poisoness trees, shrubs, etc and it scared the heck out of me. Seems like just about anything overindulged is bad.... Apple seeds being one example. One trend I noticed was stuff with colorful stalks - red especially were deadly. And often it's a certain part of the plant: nightshade it's the berries, others the leaves or stalks. It's good idea to pick up a book and get familiar with the ones in your region. One horrible one we have in Fla is the Roseary pea. It's a vine that grows all over other plants, has a brown pod that opens up and there is a red hard shelled pea with a black spot on it. ONE pea if crushed and swallowed will kill a horse and of there's NO CURE. It's deadly to all animals. I never let my horse munch along the trails as you see this stuff everywhere. We work hard to get rid of it, but I remember seeing it growing up in the 60's... so we're not winning the battle. | 
poisionous plants
