Hewittia malabarica ?

Hewittia malabarica ?; 

Convulvulaceae ID from Bangladesh SM 196 : 4 posts by 2 authors. Attachments (1)
To me it seems to be Ipomoea obscura.
Hewittia malabarica based on the frontal view of the bloom and some of the leaves visible in the photo, although I would like to remind that sepal views should be considered as essential...
Ipomoea obscura
All the characters are not clear, may be Hewittia malabarica or Ipomoea obscura.
It's Hewitia sp.