5-and-a-half-acres:

Winter or fragrant honeysuckle which is a great plant for January/February as it has very fragrant lemon scented flowers. I just read it is invasive in some areas of the US. 

Lonicera fragrantissima. 

http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=d970