Plant Galls

A much-needed study on plant galls – growths on plants formed of plant tissue that are caused by other organisms. Most naturalists have come across oak apples, robin’s pincushions, marble galls and witches’ brooms, a few of the more familiar examples of the strange growths that are plant galls. They are beautiful, often bizarre and colourful, and amazingly diverse in structure and in the organisms which cause them. They have been known since ancient times and have attracted superstitions and fol