Believe it or not, it is a rose. Obviously not the typical rose, but it is in the same family. The poison is very potent, yet passes slowly and agonizingly through a person's bloodstream, working its way to the heart. From what he told me, it takes a person a week to die once they are poisoned, and there is no antidote.
However, I am attempting to creating an antidote for it. Also I am making a more concentrated form of the poison to learn more about its properties. It truly is a fascinating species of plant, the likes of which are not found on Earth.