Vinca is European. We have an old cemetery on our property up in the mountains. Vinca was planted around it a hundred years or so ago, now it covers a several acre area under giant tulip poplars. Looks nice, but not native. You stumble across all kinds of exotics up here when you get close to old settler homesites in the mountains.
Perinkle was often used as a 'groundcover' which did not require mowing in cemetaries - giving it the common name grave yard vine. Periwinkle also remains aesthetically pleasing most of the year, as it tends to bloom with a light blue-violet flower throughout the spring and summer months.