The genus name honors the English botanist William Vernon, who did fieldwork in North America. Back of a moist wildflower garden. Can also use on the edges of natural or created wetlands and streams.

Natural range is restricted to coastal areas. Native borders, foundation plant, especially in salty environments. Can be trimmed.

Three subspecies occur in Florida.  The subspecies ranges somewhat overlap.  Subspecies cruiseana is listed as Endangered by the State of Florida. Informal wildflower garden.

The entire state excepting the keys falls within the range of this plant which extends from North Carolina to Texas.   Herbarium specimens document occurrence, at least sporatically, throughout the peninsula but not in the Florida keys.  Counties without documented specimens are ones with heavy urbanization, dominance by unsuitable habitats, intensive farming or silviculture, or generally a lack of public access for botanizing. Moist meadows

The name 'passion' is a reference to the crucifixion of Jesus of Nazareth. Parts of the flower are said to resemble instruments used during the crucifixion. Given the proper support this plant makes an excellent climbing vine hedge.

Less aggressive growth than similar Asian species. Blooms only on new wood. At least one cultivar has white flowers. Good trellis, post or fence vine. It's a legume, so it can grow in poor soils, but blooms much better with a richer soil mixture.