Oenothera Biennis (Evening Primrose)

Whilst being no relation to the true primrose, this is the original "Evening Primrose" beloved by gardeners and herbalists alike. Furthermore the epithet 'biennis' is not necessarily strictly true, this plant often behaves as a perennial, producing large, floppy, gently-perfumed, primrose yellow flowers on robust stems, until the late autumn. A final contrariness: the flowers actually do open during the day!