Several common household plants can be toxic to dogs if ingested. Here are some examples:

1. Sago Palm: All parts of the sago palm are toxic to dogs and can cause symptoms ranging from vomiting and diarrhea to liver failure and even death.

2. Aloe Vera: While aloe vera is known for its medicinal properties for humans, it can cause vomiting, diarrhea, and lethargy in dogs if ingested.

3. Philodendron: This popular houseplant contains calcium oxalate crystals, which can cause irritation and swelling of the mouth and throat if chewed by dogs.

4. Pothos (Devil's Ivy): Similar to philodendron, pothos contains calcium oxalate crystals and can cause oral irritation, vomiting, and difficulty swallowing if ingested.

5. Dieffenbachia (Dumb Cane): Another plant containing calcium oxalate crystals, dieffenbachia can cause intense burning and swelling of the mouth and throat, leading to difficulty breathing if ingested by dogs.

6. Snake Plant (Mother-in-Law's Tongue): While not typically severe, ingestion of snake plant can cause gastrointestinal upset in dogs, including vomiting and diarrhea.

7. Peace Lily: Peace lilies contain calcium oxalate crystals, which can cause oral irritation, drooling, vomiting, and difficulty swallowing if ingested by dogs.

8. Amaryllis: All parts of the amaryllis plant are toxic to dogs and can cause vomiting, diarrhea, abdominal pain, and tremors if ingested.

9. Rubber Plant: Rubber plants contain compounds that can be toxic to dogs, causing gastrointestinal upset, vomiting, and drooling if ingested.

10. Jade Plant: Ingestion of jade plant by dogs can cause vomiting, depression, and incoordination due to its toxic compounds.

It's important for pet owners to research any plants they have in their homes and ensure they are safe for their dogs. If you suspect your dog has ingested a toxic plant, contact your veterinarian immediately for guidance.