The trumpet vine or trumpet creeper (Campsis radicans), also known as "cow itch vine" and (in horticulture

Horticulture

Horticulture is the industry and science of plant cultivation including the process of preparing soil for the planting of seeds, tubers, or cuttings. Horticulturists work and conduct research in the disciplines of plant propagation and cultivation, crop production, plant breeding and genetic...

) as "hummingbird vine

Hummingbird vine

Hummingbird vine is a colloquial term for certain climbing plants whose flowers are pollinated by hummingbirds. They are often planted in American gardens to attract these birds.* Campsis radicans of the trumpet-creeper family...

", is a large and vigorous woody vine

Vine

A vine in the narrowest sense is the grapevine , but more generally it can refer to any plant with a growth habit of trailing or scandent, that is to say climbing, stems or runners...

 of the family Bignoniaceae

Bignoniaceae

The Bignoniaceae, or Trumpet Creeper Family, is a family of flowering plants comprising about 650-750 species in 116-120 genera. Members of the family are mostly trees and lianas , shrubs and more rarely herbaceous plants. As climber plants, they are twine climbers or tendril climbers, and rarely...

, notable for its showy trumpet-shaped flower

Flower

A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...

s. It is native to woodlands and riverbanks of the southeastern

Southeastern United States

The Southeastern United States, colloquially referred to as the Southeast, is the eastern portion of the Southern United States. It is one of the most populous regions in the United States of America....

 United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, but is a popular garden perennial plant

Perennial plant

A perennial plant or simply perennial is a plant that lives for more than two years. The term is often used to differentiate a plant from shorter lived annuals and biennials. The term is sometimes misused by commercial gardeners or horticulturalists to describe only herbaceous perennials...

 across much of the US and southern Canada, as some cultivar

Cultivar

A cultivar'Cultivar has two meanings as explained under Formal definition. When used in reference to a taxon, the word does not apply to an individual plant but to all those plants sharing the unique characteristics that define the cultivar. is a plant or group of plants selected for desirable...

s are hardy to as low as -30°F/-34°C.
The leaves

Leaf

A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....

 are opposite, ovate, pinnate

Pinnate

Pinnate is a term used to describe feather-like or multi-divided features arising from both sides of a common axis in plant or animal structures, and comes from the Latin word pinna meaning "feather", "wing", or "fin". A similar term is pectinate, which refers to a comb-like arrangement of parts...

, 3–10 cm long, and emerald green when new, maturing into a dark green.