EVENING PRIMROSE Oenothera biennis Biennial medicinal sow: late spring late summer or early autumn Oil - in seeds - contains gammalinolenic acid (GLA), p precursor of prostaglanden E, which is very active biologically regulating such functions as the vessel and immune systems. By supplementing the diet with GLA, one can bypass a blockage of prostaglandin E, production caused by aging, poor diet, alcoholism. PMS complaints disappear. Roots: can be eaten, steamed, as a vegetable Shoots: in salads