There is no inherently poisonous acorn. Livestock may graze on leafs and young acorns and die from tannic poisoning. Cases of people eating unleeched acorns suffering poisoning after several days are also recorded. Virtually all species of quercus require leeching. Taste of individual species varies greatly but all are edible. It is an acquired taste regardless. Acorns are the single richest plant food source known. A paper by Brian Herzog gave a nutritional analysis and comparison to our other main food crops. When you collect your mast ( the correct name for the seed as a crop) don't forget that they support many animals, from a parasitic worm to deer and bear. * this is Chris Kavanaugh. I was working on Fox10s account and failed to relog <img src="/images/graemlins/blush.gif" alt="" />