Jade plant (Crassula ovata) is mildly toxic to dogs through an unknown compound.
Common as a houseplant; ingestion causes vomiting, lethargy and incoordination.
The specific toxin in jade plant is not fully characterised, but ingestion reliably causes vomiting, ataxia and depression in dogs. The bradycardia sometimes reported suggests a cardiac glycoside-like effect.
Fuentes
Moderate ingestions warrant veterinary assessment, especially in small dogs.