Here is the story of the remarkable evening primrose, and the uses to which the oil from its seeds can be put--one of the major ones being in the treatment of premenstrual tension. It is a story which could turn out to be one of the most fantastic in plant history. Like foxglove (digitalis), cinchona bark (quinine) and rauwolfia (reserpine) it promises to take its place in the hall of fame of plants and herbs with important medicinal properties. But, unlike these other natural products which are on the whole useful for one condition only, the oil of the evening primrose has properties which make it useful for a wide range of conditions