SK1706 08 Jan 2019 : 7 posts by 4 authors. Attachments (1)- 5 Mb. 

Location : Sentosa , Singapore
Date : 18 October 2012
Altitude  131 m.
Habit : Cultivated
Malvaviscus arboreus var. drummondii (Torr. & A.Gray) Schery. 
or some other  ??

Also check 

Possibly Malvaviscus arboreus var. drummondii ?? 

I checked and could not differentiate.

Pl. go through the discussions herein. 

first the flower is past its prime and both are open. the calyx and epicalyx of the front one covered by an invading catterpillar i think.
though i suspect the calyx and epicalyx may have been the same size as seen in pictures of Texas mallow.
leaves are three veined from the base in this case, and i suspect in the picture of texas mallow i cited above.
i suspect this could be temporirily put under Texas mallow, as per … opinion and not our regular Lanka joba or Malvaviscus arboreus Cav. 
… had this as diagnostic feature
Flowers erect, less than 4 cm long, leaves nearly ovate, 5-veined from base..Malvaviscus arboreus Cav.  
there is no way to follow this up. so we are stuck with: possible diagnosis