The last time someone near and dear to me ate pyracantha berries was more tha 50 years ago. Our son and his playmate had made a bet to see who could eat the more berries. By the time I knew about it, they were both green. I called the local hospital, they sent an ambulance and told me, "While you're waiting, make them drink dirty dishwater and give them syrup of ipecac to induce vomiting." That was before the days of Poison Control at 1-800 So, I think before I'd make pyracantha jelly a call to that 1-800 number might be in order. Besides, George, you have such an extensive and bounteous garden that you should have no lack of stuff to preserve or can or freeze, and you wouldn't have to sink to something as disgusting sounding as pyracantha. Agarita, now, that's a different story. Pat, who hopes you'll post whatever the poison control people say.