"
I think Saroj ji's Leea from Singapore is Leea rubra Bl.ex Spreng. Its petals are red inside as in Singapore Govt. Agency site - https://www.nparks.gov.sg/florafaunaweb/flora/2/1/2192
As for all red coloured cultivated / ornamental
Leaa, I would go for
Leea guineensis G. Don, for they all feature petals creamy-white inside. And leaves are quite different - wavy, shiny, cuneate at base .... as in Singapore Govt. Agency site -
https://www.nparks.gov.sg/florafaunaweb/flora/4/3/4371. All other sites might have mixed up
L. rubra and
L. guineensis.
It is expected that flowers of L. guineensis would be "creamish yellow" when open, because the "paper", while describing Leea setuligera Clarke, notes. "very similar to L. guineensis in general appearance, and possibly frequently overlooked and confused with that species. ......""