Aralidium pinnatifidum is NOT 'Nationally Extinct'. It should not be.
I am surprised the newly revised Red Data Book (2nd edition, 2008) still listing it as such.
Quite a few of these rare small trees are to be found barely inches away from the boardwalk at MacRitchie Nature Trail. Historically, they were only reported through collections from Bukit Timah and Jurong. Leaves are lobed as shown below but they can be entire too. The entire-leafed trees are also found at the boardwalk.