Wildflowers: Sarawak flower identification

Can someone help me identify this flower?

These were taken at the end of May 2014 at the Annah Reis Longhouse in Padawan, Sarawak.

I think these are all the same flower. That said, I am not sure that the last photo here is from the same plant. They were all together but it doesn't look quite the same.

Can someone help me with this. Thank you.

 

Costus of some kind.

 

Thank you but can you suggest which type of Costus this is?

 

Costus woodsonii.

 

Costus woodsonii is it exactly. Thank you for your help.

 

Is the last photo also costus woodsonii?

 

The last photo does not look familiar to me.