Fragrant yellow flowers grace the twining stems of Carolina jasmine (Gelsemium sempervirens), also called Carolina jessamine. This native flower grows in U.S. Department of Agriculture plant hardiness zones 7 through 9 with moderate to rapid growth. Dark green leaves turn to bronze tones in winter. It's drought tolerant once established, and all parts of the plant are toxic. The variety "Plena" has double flowers. The dainty yellow flowers of butterfly vine (Mascagnia macroptera) are 1 inch wide and look rather orchid-like. Dark green leaves cover the vines, which reach 10 to 12 feet high. This vine can clamber over a trellis or be used as a ground cover in USDA zones 8 through 10. The main blooming period is spring, but it can flower again in fall.
Profuse showy flowers carpet yellow trumpet vine (Macfadyena unguis-cati), also called cat's claw vine, in spring. Pronged claw-like holdfast organs attach the plant firmly to the substrate. The flowers attract hummingbirds, butterflies and bees. Fast-growing, the vines can grow 20 to 25 feet long in USDA zones 9 through 11. The cheerful yellow tubular flowers of black-eyed Susan vine (Thunbergia alata) are 1.5 inches wide and have a central brownish-purple eye. Hardy in U.S. Department of Agriculture plant hardiness zones 10 through 12, this tender plant is treated as an annual in colder areas. Vines reach 8 feet tall as an annual and 20 feet tall where it is hardy.
A late-flowering vine, Russian virgin's bower "Golden Tiara" (Clematis tangutica "Golden Tiara") produces bright golden-yellow flowers in midsummer to late fall. Flowers start out bell-shaped but fully open to show central crimson stamens. Native to China, the vine grows to 15 or 20 feet in USDA zones 5 through 11. Sporting huge 6- to 10-inch-wide cup-shaped open flowers, cup of gold vine (Solandra maxima) has heavy ropy stems that need strong support. Yellow flowers turn to gold over time. The fast-growing vines are hardy in USDA zones 10 through 11.
For pleasant garden fragrance, choose Italian jasmine (Jasminum humile), which has yellow flowers in summer. Slender stems create a mounded appearance, with growth 5 to 7 feet high. This vine can be grown against trellises. Growing in USDA zones 7 through 9, the plant is semi-evergreen to evergreen. Trailing stems of primrose jasmine (Jasminum mesnyi) are covered with open, almost 2-inch-wide double yellow flowers. The fragrant flowers appear in spring in USDA zones 8 through 10. Use it as a fountaining shrub that reaches 5 to 10 feet wide; train the stems through trellises or let them grow to cover walls and fences.