Forgive me if this has been done but I read somewhere in these forums that someone had a link to a site that ranked poisonous flowers used to commit suicide or something along those lines. If anyone knows the site, I would love that link! And in general, anyone have any experience/insight about trying this method. I know it probably isn't very reliable but I'm trying to gauge the effectiveness of a whole cocktail of poisonous flowers.
There is a flower that can poison you. It is the seeds that kill. I tried that many years ago and it did not work. I vomited, bled, and ended up in the hospital after crawling 2 blocks to the road. It was supposed to take a few hours to die, but twelve hours later I realized that it was not going to work and managed to find someone to call an ambulance. I would never advise anyone to try that route. A nightmare.
There are some types of Yew, cherry trees/cherry laurel, Queen Anne's Lace, Hemlock. With all of these you need to separate the active ingredient from the rest. The strength of the poison is directly related to growing conditions, and time of year. Ei. The greater the amount of traffic near a growing Cherry Laurel, the greater the amount of cyanide. But you do need to synthesize the active ingredient. In this case cyanide.