What's Dillenia?

Dillenia or much known as 'simpoh' or 'chimpoh' by the locals has very large and attractive flowers with huge leaves that are toothed. Besides that, fallen leaves of 'simpoh' will leave horse-shoe scars on it's twig. The bark of the tree are usually red to pinkish red or brown-orangey though the dead outer bark may be greyish in colour (Ridley 1922). The name 'simpoh' that had been given by the locals is believed being obtained through the hissing sound made by the tree trunk when being slashed using 'parang'. Please take note that the sound can only be heard when one stuck his or her ear at the area that is being slashed. The hissing sound is obtained due to the process of air being sucked through the empty spaces in the wood when water is being sent from the trunk to the leaves.