Tomatoes plants ARE poisonous. The leaves and stems will cause violent gastric distress and have even caused death in livestock (deadstock?).

I just read last night that a bamboo tube containing seeds 2,000 years old was wrapped in wet cloth to protect it and two days later the seeds sprouted. The plants turned out to be tomatoes, different shape to modern ones, but the same red-to-green colour as they ripened. Sounds a bit fishy to me -- I was always led to believe the plant came originally from Central America. I'll see what else I can unearth ...