Devon Cream Jasmine. This is an improved selection of Common Jasmine which has larger flowers than the species and also a more intense fragrance, if one can imagine as much. The flowers are a distinct soft yellow which contrasts with the species of pure white flowers. One may see it also see this cultivar listed as 'Clotted Cream,' so I don't know the priority of its "first naming." This is a great semi-evergreen vine with fine texture and climbs by twining. Plant it close enough to the home so that everyone can appreciate the overwhelming fragrance. It's really quite vigorous and can reach heights of 10-15', but Dirr says that if trained on a wall, it can reach heights up to 40'. The leaves are opposite and pinnately compound as one can see by the pictures. It can flower from June to October in the Deep South. Many give a zone of 8-10, but I have seen it growing outside in Raleigh, NC, and it has done well. So that would be zone 7b.