Genus: Gelsemium (jel-SEM-ee-um)
Species: sempervirens (sem-per-VY-renz)
Native to Florida, blooming early (despite the cold) in the Florida Panhandle. A familiar site in spring. Vines do not aggressively choke, but do send streamers of chrome yellow up into the treetops.
This was taken in Bayou George, FL (Florida panhandle).