Seed when castor beans have been ingested by animals. In addition, seeds containing amygdalin—apple, apricot, bitter almond, peach, plum, cherry, quince, and others—when consumed in sufficient amounts, may cause cyanide poisoning. Other seeds that contain poisons include annona, cotton, custard apple, datura, uncooked durian, golden chain, horse-chestnut, larkspur, locoweed, lychee, nectarine, rambutan, rosary pea, sour sop, sugar apple, wisteria, and yew. The seeds of the strychnine tree are also poisonous, containing the poison strychnine. The seeds of many legumes, including the common bean ("Phaseolus vulgaris"), contain proteins called lectins which can cause gastric distress if the beans are eaten without cooking.
Seed Savers Exchange "most diverse farm in the world" by ethnobotanist Gary Paul Nabhan. At Heritage Farm, more than 25,000 rare fruit, vegetable, and plant varieties are regenerated, refrigerated and preserved in a central collection. It has its own underground seed vault held at below-freezing temperatures. Heritage Farm keeps a historical record of each variety it maintains. A herd of White Park Cattle as well as 900 apple tree varieties are also maintained on the farm. Heritage Farm holds a visitors' center that offers events and classes. In December 2007, Seed Savers Exchange made an inaugural deposit of nearly 500 varieties to the