Among the largest-flowered and handsomest of all known types of herbaceous vegetation. The yellow species, and varieties like and allied to the common Evening Primrose (CE. biennis), may be readily naturalised in any position, from a rubbish-heap to a nice, open, sunny copse ; while such prostrate ones as Œ. marginata and Œ. macrocarpa will prove very fine among dwarf herbs on banks or in open sunny places, in light or calcareous soil. These noble and delicately-scented flowers are very easily grown and very beautiful in any position. They, however, from their height and boldness, and the freedom with which they grow in almost any soil, are peculiarly suited for the wild garden, for shrubberies, copses, and the like, sowing themselves freely.