I had to look these up and found a nice article about these:
"SARCOCOCCAS should be better-known. Also called Christmas or sweet box, even these inviting names have failed to make them popular and they remain the most neglected of evergreens. Amazingly easy to grow, more reliable and glossier than box, with shinier leaves and incredible-smelling flowers, sarcococcas could be the plants to choose for edging formal beds, especially in shade. Why have they never caught on?
Visitors who come to the garden here in the winter months always remark on the glorious smell of the sarcococcas. Near the back door, a bush of Sarcococca confusa makes a fountain of green all year. This is the largest and bushiest of the sweet boxes. It can grow as high as 6ft but 4ft is a more usual height. It spreads a bit, but who cares when it is such an obliging plant? A bush that is healthy all year, flowers during the dreariest season and is so cheerful and sweet smelling deserves some space. After the tiny white-scented threads fall, confusa has black berries.
Smaller than S. confusa is S. ruscifolia var. chinensis, which has flowers all the way up the stem, followed by red berries. It came from China in the late 19th century and looks as polished as porcelain. Flower-arrangers like the fact that it can last for as long as a fortnight in water, while gardeners praise its neat elegance.
more to read here
All the best Jan