@chhari55 I wonder if this pic, all of your beautiful pics, uploaded to "Vinca" may be these:
Vinca (Catharanthus roseus)
It's possible they are one of the species in Vinca genus I've never seen before. The ones I have seen, V. major and V. minor, are vines with periwinkle blue blooms. That's why those also share the nickname of "periwinkle."
