Campsis radicans (trumpet creeper, also known as cow itch vine or hummingbird vine), is a large and vigorous deciduous woody perennial vine of the family Bignoniaceae, alternate scientific names have included Tournefort's Bignonia radicans and Tecoma radicans.
It is notable for its showy trumpet-shaped flowers. It is native to woodlands and riverbanks of the southeastern United States, but is a popular garden subject especially in Mediterranean area. Some cultivars are hardy to as low as -34 °C. The leaves are opposite, ovate, pinnate, 3–10 cm long, and emerald green when new, maturing into a dark green. The flowers come in terminal cymes of 4–12, orange to red in color with a yellowish throat, and generally appear after several months of warm weather. It grows to 3–10 m. The flowers are very attractive to hummingbirds, and many types of birds like to nest in the dense foliage. The flowers are followed by large seed pods. As these mature, they dry and split. Hundreds of thin, brown, paper-like seeds are released. These are easily grown when stratified.
The vigor of the trumpet vine should not be underestimated. In warm weather, it puts out huge numbers of tendrils that grab onto every available surface, and eventually expand into heavy woody stems several centimeters in diameter. It grows well on arbors, fences, telephone poles, and trees, although it may dismember them in the process. Ruthless pruning is recommended. Outside of its native range this species has the potential to be highly invasive.