Catharanthus roseus 'Titan Polka Dot'

It does look more like Oenothera filiformis than the other bee-blossoms; if so, I wonder how it got to my yard in SC? I kept looking at the Oenothera/Gaura species that should be in my area, and they don't quite look right either. I was somewhat reassured, though, to read this statement at the Lady Bird Johnson Wildflower site: "The genus is easily recognized, but the species are sometimes difficult, due partly to a great deal of hybridization." I had trouble finding info about the usual height of these various species. Also, some seem to have leaves all along the stalk, while my plant has leaves at the bottom, then a stalk that is free of leaves, but plenty of those odd-looking buds and flowers. Sometimes I am pretty slow on the uptake... I did not realize until I read a blurb at the Smithsonian web site that these things bloom at dusk. So I was discounting images with fully opened flowers because I hadn't looked at this plant with the flowers fully open. Duh! Looks different by flashlight... So I guess I'll go with O. filiformis or a hybrid with no "upper foliage". Thanks, Virginia

tough straight down pix ... i recognized the flower..but boy it wasnt easy seeing the leaves beyond ... plant structure i mean .... should be fragrant.. especially when the other flowers open ken

" is that photo a bit photo-shopped? .. or was it taken at the precise moment of time at dusk with pink sky.. when you can capture this type of color pic? " It was edited with Photoscape, but I didn't adjust the colours.....I cropped it, increased the sharpness, and decreased the contrast a bit to keep the white flowers from overpowering the purple and pink ones. Otherwise, it was taken with a Sony mirrorless Alpha 6000, on a sunny day, sometime before lunch. Thank you to everyone for your help. I'd only ever previously seen the "mophead" hydrangeas.