Swamp jessamine is the only jessamine you might encounter in a swamp. This is a north Florida species and is present only in the Panhandle counties as well as Hamilton and Nassau Counties along the Georgia border. It also occurs in the states of the Southeast Coastal Plain - from Louisiana to North Carolina.
Like its close cousin, swamp jessamine is an evergreen vine without tendrils. It climbs throughout the adjacent vegetation by twining up and over it. The lanceolate leaves are opposite each other on the stems.
Blooming occurs in late winter/early spring. These photos were taken on March 8 in Tate's Hell State Forest, Franklin County. The blooms are a rich yellow, but without the characteristic fragrance that makes yellow jessamine so spectacular as a home landscape plant. Despite this, they are visited by much the same pollinators.
Swamp jessamine has not been offered by nurseries associated with FANN - the Florida Association of Native Nurseries. I do not have experience with it in my landscape and do not know how adaptable it might be to non-wetland conditions or regions of the state outside its natural range. This is a beautiful wildflower for wetland sites in north Florida. For other situations, yellow jessamine is a better choice.