Campsis radicans, the trumpet vine, yellow trumpet vine, or trumpet creeper (also known in North America as cow itch vine or hummingbird vine), is a species of flowering plant in the family Bignoniaceae, native to the eastern United States, and naturalized elsewhere. Growing to 10 m (33 ft), it is a vigorous, deciduous woody vine, notable for its showy trumpet-shaped flowers. It inhabits woodlands and riverbanks, and is also a popular garden subject.
The leaves are opposite, ovate, pinnate, 3–10 cm (1+3⁄16–3+15⁄16 in) 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.
Campsis radicans is native to the eastern United States and extreme southern Ontario. It is naturalized in parts of the western United States as well as in Ontario and southern Quebec, parts of Europe, and scattered locations in Latin America.
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 Latin specific epithet radicans means "with stems that take root". The plant is commonly known as cow-itch vine because skin redness and itching is experienced by some people after coming in contact with the leaves.
The flamboyant flowering of Campsis radicans made it obvious to even the least botanically-minded of the first English colonists in Virginia. Consequently, the plant quickly made its way to England early in the 17th century. Its botanical parentage, as a hardy member of a mostly subtropical group, made its naming problematic: according to John Parkinson, the Virginia settlers were at first calling it a jasmine or a honeysuckle, and then a bellflower; he classed it in the genus Apocynum (dogbane). Joseph Pitton de Tournefort erected a catch-all genus Bignonia in 1700, from which it has since been extricated.
The trumpet vine grows vigorously. 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, even as far north as New England. The trumpet vine thrives in many places in southern Canada as well.
- Kew World Checklist of Selected Plant Families
- "Campsis radicans". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 December 2017.
- "RHS Plant Selector - Campsis radicans f. flava". Retrieved 15 April 2020.
- John Tveten; Gloria Tveten (5 July 2010). Wildflowers of Houston and Southeast Texas. University of Texas Press. p. 184. ISBN 978-0-292-78687-5.
- Dale Mayer (12 November 2010). The Complete Guide to Companion Planting: Everything You Need to Know to Make Your Garden Successful. Atlantic Publishing Company. p. 246. ISBN 978-1-60138-345-7.
- Biota of North America Program, 2013 county distribution map
- "Campsis radicans (Cow-itch, Cow Vine, Devil's Shoestring, Foxglove Vine, Hellvine, Trumpet Creeper, Trumpet Vine) | North Carolina Extension Gardener Plant Toolbox". plants.ces.ncsu.edu. Retrieved 2021-12-22.
- Harrison, Lorraine (2012). RHS Latin for gardeners. United Kingdom: Mitchell Beazley. p. 224. ISBN 9781845337315.
- "Campsis radicans - Plant Finder". www.missouribotanicalgarden.org. Retrieved 2021-12-22.
- Alice M. Coats, Garden Shrubs and Their Histories (1964) 1992, s.v. "Campsis".
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