What vegetables are toxic to dogs?

Hello there, I'm curious about a specific aspect of pet care. Could you please shed some light on the question of which vegetables are potentially harmful or toxic to dogs? I've heard that some commonly consumed veggies by humans might not be suitable for our furry friends. Could you enumerate a few examples and perhaps explain why they're dangerous for dogs? Understanding this would certainly help many pet owners ensure their dogs' health and safety. Thank you in advance for your insights.