Got the ID from Dr. YC Wee (who asked from a forum:Appreciation Plants NSS [NSSPlantsAppreciation@yahoogroups.com] ).
Abroma augusta (Common name ; Devil's cotton)
Sterculiaceae (now re-classified as Malvaceae)
The same flower here from Mable Lee of Singapore. Here again
Look like this plant have a medicinal properties, and use in homeopathic practice.