Daphne bholua ‘Alba’, the white flowered form of this intoxicatingly sweet scented shrub. Typically evergreen and growing 6′ to 10′ high, less in spread. Reading from Michael Dirr’s Encyclopedia ‘The Daphnes are great garden plants and several species offer the sweetest fragrance… Daphne culture is akin to voodoo medicine, and many different recommendations are given. From my experience, it is best to provide well drained soils and adequate organic matter and even moisture, in shade or partial sun. A pH range of 6 to 7 is recommended, but daphnes will grow in soils with pH of 4.5. Once planted, do not move, prune, or abuse in any way’.
Look out for other species – daphne odora aureomarginata with yellow margined leaves and reddish purple flowers, Daphne mezereum which flowers rose-purple on bare stems. Daphne x transatlantica a hybrid and cultivars that will flower sporadically throughout the summer and are all the rage (and expensive).
This image taken at RHS Wisley on a crisp snowy January afternoon. If I had taken a different path, I might not have come across it.