ASPCA listed so many toxic plants (The link is in my previous blog on the subject) that I couldn't even read them all, let alone make any intelligent decisions based on the list.
Here is a list of the 5 deadliest--all common in Southern California:
If the subject weren't so serious, the article would be amusing for its incredibly mangled English. I wonder what the writer's native language is.
Here's a synopsis of their list:
1. Lilies of all varieties. They can cause cardiac arrest and are so toxic that you shouldn't even let your dog swim in a pond with water lilies in it. Lilies, apparently account for 45% of all dog poisonings, so they're a serious threat.
2. Azaleas and Rhododendrons of all varieties. Symptoms include loss of balance and projectile vomiting, followed by coma and death.
3. Sago Palms are toxic both to dogs and to humans, resulting in death for 75% of the dogs who ingest it, and liver damage for those who survive.
4. Castor Bean Plants contain the deadly poison, ricin. Symptoms include convulsions, followed by paralysis and death. There is no known treatment.
5. Oleander is lethal to both dogs and humans. The different parts of the plant apparently contain different toxins, all lethal.
I'll try to verify this information.